taxonID	type	description	language	source
D40B8780CA44FFE0D7F1F8FAFC90FEEF.taxon	description	urn: lsid: zoobank. org: act: A 2 AFDE 14 - 33 A 0 - 4061 - A 934 - 7 B 0 EA 79 ECBC 5	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA44FFE0D7F1F8FAFC90FEEF.taxon	description	Redescription. Male. Length from front of head to tips of folded forewings: 2.0 – 4.5 mm. General color, light brown or brown, usually with spots of green setae on head, thorax, and wings. Head usually unmodified; when modifications present, with membranous protuberances, covered by setae. Ocelli 2 or 3. Antenna 19 – 21 articulated, scape cylindrical; pedicel cylindrical; flagellomeres cylindrical, unmodified. Forewings each with costal vein unmodified or bearing short basal bulla. Abdominal segment VII bearing one or two ventromesal processes. Male genitalia. Segment VIII shorter dorsally than ventrally. Segment IX mostly within segment VIII, ventrally open, with or without posterior processes. Preanal process present or absent. Inferior appendages short and paired or fused to each other basally or fused to each other completely as a conspicuous plate. Subgenital plate present and broad. Tergum X membranous, simple or bilobed. Phallus tubular basally, bearing midlength complex, with dorsal window and basal loop; apical portion with or without spines and sclerites.	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA44FFE0D7F1F8FAFC90FEEF.taxon	distribution	Distribution. Argentina, Brazil, Ecuador, French Guiana, Peru, Suriname, Uruguay, and Venezuela (Fig. 16).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA44FFE0D7F1F8FAFC90FEEF.taxon	discussion	Remarks. As indicated by Santos et al. (2016), Acostatrichia probably is not a monophyletic group, but the relationships of species included in this genus remain uncertain. Currently, adult males of Acostatrichia can be distinguished from those of other Leucotrichiini genera by the combination of the following features: (1) antennal articles are simple, with the scape usually twice as long as wide; (2) each forewing costal vein is simple or bears a short bulla (not reflexed); (3) abdominal segment VII has a long ventromesal process or has two ventromesal processes; (4) abdominal segment VIII or IX bears paired posterior processes. Here, Acostatrichia species are divided into three species groups: The A. plaumanni Group (including the type species), the A. brevipenis Group, and the A. cerna Group. These groups are defined based on a combination of morphological features as an attempt to understand better the diversity in this genus. The characteristics chosen here to distinguish the species groups are based on the morphological characters provided by Santos et al. (2016) and also on the re-examination of Acostatrichia specimens. Even so, some species are still difficult to allocate, since they do not necessarily have all defining features of their groups.	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA46FFE0D7F1FE76FDCAFD47.taxon	discussion	Remarks. This species group includes the type species and another 5 species: A. araca sp. nov., A. elvesta Oláh & Flint 2012, A. fluminensis (Santos & Nessimian 2010), A. plaumanni Mosely 1939, A. simulans Mosely 1939, and A. spinifera Flint 1974. Males of these species share the following morphological features: (1) a short costal bulla usually on each forewing (absent in A. fluminensis); (2) abdominal segment VII with two short ventromesal processes; (3) inferior appendages short and completely separated from each other; and (4) segment IX with a conspicuous pair of dorsolateral processes.	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA46FFE7D7F1FCEEFD99FECC.taxon	description	Figs. 1 – 2, 16	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA46FFE7D7F1FCEEFD99FECC.taxon	description	urn: lsid: zoobank. org: act: 60 DAE 957 - B 3 B 7 - 45 C 5 - BADC-B 5 AB 13 B 7 D 303	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA46FFE7D7F1FCEEFD99FECC.taxon	description	Description. Male. Length: 2.2 – 2.5 mm (n = 7). General color, in alcohol, light brown. Head modified, in dorsal view with dorsal triangular protuberance and frontal membranous protuberance both covered by setae (Figs. 1 A, 1 B). Ocelli 2 (Fig. 1 B). Antenna 19 - articulated, scape cylindrical and more than twice as long as wide, inner margin slightly produced posteromesad in dorsal view (Fig. 1 B); pedicel cylindrical; flagellomeres cylindrical, unmodified. Forewings each with costal vein bearing short basal bulla (Fig. 1 C). Abdominal segment VII bearing two short, acute ventromesal processes in tuft of long setae (Figs. 2 A, 2 C). Male genitalia. Segment VIII shorter dorsally than ventrally; in ventral view, posterior margin of sternum produced as transverse bar with acute posterolateral angles (Fig. 2 A); in lateral view, as truncate process (Fig. 2 C); without lateral processes; tergum with row of long setae (Figs. 2 B, 2 C). Segment IX mostly within segment VIII, ventrally open, with pair of elongate dorsolateral processes, curved inwards apically in dorsal and ventral views (Figs. 2 A, 2 B), gradually upturned in lateral view, each one with short basodorsal spine (Fig. 2 C). Preanal process absent. Inferior appendages paired, short and digitate in ventral view, with few apical and subapical spines but without apical or basal processes (Fig. 2 A). Subgenital plate with transverse process on basal area and round at apex in ventral view (Fig. 2 A); in lateral view, with narrow and downturned apex (Fig. 2 C). Tergum X membranous, posterior margin convex in dorsal view (Fig. 2 B). Phallus tubular basally, bearing midlength complex, with dorsal window and basal loop shorter than basal portion of phallus (Figs. 2 D, 2 E); apical portion with long thick internal spine (Fig. 2 E) which is plate-like in dorsal view (Fig. 2 D).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA46FFE7D7F1FCEEFD99FECC.taxon	materials_examined	Material examined. HOLOTYPE male: Brazil, Amazonas, base Serra do Aracá, Igarapé da Cobra, 00 ° 52 ’ 34 ” N 63 ° 27 ’ 04 ” W, 02. viii. 2009, J. O. da Silva, J. L. Nessimian, U. G. Neiss, light trap (INPA); PARATYPES: same data, 3 males (DZRJ), 3 males (INPA).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA46FFE7D7F1FCEEFD99FECC.taxon	discussion	Remarks. Males of Acostatrichia araca sp. nov. have unusual modifications on the head (Figs. 1 A, 1 B), which are not found in other Acostatrichia species. The new species is also peculiar for having only two ocelli, in the genus this condition is found only in A. elvesta. The holotype, which is the unique known specimen of A. elvesta, was not located and we were not able to confirm the presence or absence of modifications on the head of the species, but nothing about these modifications is mentioned in the original description. Related to other morphological features, the new species shares with other Acostatrichia species the presence of a costal bulla on each forewing and the similar general aspect of male genitalia. It is included in the A. plaumanni Species Group due to segment VII bearing two short ventromesal processes; segment IX bearing a pair of long dorsolateral processes; and the inferior appendages being short and not fused mesally. Acostatrichia araca sp. nov. can be distinguished from all other species in the genus by the head with a setose dorsal triangular lobe and a setose frontal lobe (Fig. 1 B); from other Acostatrichia in the A. plaumanni Group, the new species differs by having the dorsolateral processes of segment IX long, curved upwards (Fig. 2 C), and each bearing a basodorsal spine; it also differs by having a strong apical spine on the phallus (Figs. 2 D, 2 E), which is plate-like in dorsal view (Fig. 2 D).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA46FFE7D7F1FCEEFD99FECC.taxon	etymology	Etymology. The species is named in allusion to the type locality, Serra do Aracá, a mountain range in northern Brazil, Barcelos municipality, Amazonas State.	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA46FFE7D7F1FCEEFD99FECC.taxon	distribution	Distribution. Brazil (Fig. 16).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA41FFE7D7F1FE5AFD99FC49.taxon	description	Fig. 16	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA41FFE7D7F1FE5AFD99FC49.taxon	discussion	Remarks. This species was described from only one specimen collected in Northern Brazil. Although in the original description, the unique specimen, the holotype, was said to be in the NMNH, it was not found in this collection. Based on the features provided in the original description, this species agrees with the definition of the A. plaumanni Group as I proposed here. The male has a short costal bulla on each forewing, segment VII bears a double ventral process, segment IX bears paired dorsolateral processes, and the inferior appendages are relatively short and not fused mesally. Acostatrichia elvesta and A. araca sp. nov. share the condition of having two ocelli, whereas all other Acostatrichia species have three. The male genitalia of these two species are quite different, especially with segment IX apparently bearing two pairs of dorsolateral processes in A. elvesta and the subgenital plate being divided longitudinally.	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA41FFE7D7F1FE5AFD99FC49.taxon	distribution	Distribution. Brazil (Fig. 16).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA41FFE4D7F1FBDDFD99FD47.taxon	description	Figs. 3, 16	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA41FFE4D7F1FBDDFD99FD47.taxon	description	Redescription. Length from front of head to tips of folded forewings 2.8 – 3.0 mm (n = 3). General color, in alcohol, brown. Head unmodified. Ocelli 3. Antenna 19 - articulated; scape cylindrical, more than twice as long as wide, inner margin not produced; pedicel cylindrical; flagellomeres cylindrical, unmodified. Forewings each with costal vein simple, unmodified. Abdominal segment VII bearing two acute ventromesal processes, basal one shorter (Figs. 3 A, 3 C). Male genitalia. Segment VIII shorter dorsally than ventrally (Fig. 3 C); in ventral view, posterior margin of sternum very slightly emarginated (Fig. 3 A), without lateral processes; tergum with scattered setae. Segment IX mostly within segment VIII, ventrally open; with pair of elongate dorsolateral processes, converging apically in dorsal view (Fig. 3 B); downturned in lateral view (Fig. 3 C), each one with very long apical seta. Preanal processes each digitate and bearing very long seta (Fig. 3 C). Inferior appendages paired, short and triangular in ventral view, without apical or basal processes other than few setae (Fig. 3 A). Subgenital plate, in ventral view, broad, with pointed and moresclerotized apex (Fig. 3 A); in lateral view, triangular with pointed apex (Fig. 3 C). Tergum X membranous, bilobed, quadrangular in dorsal view (Fig. 3 B). Phallus tubular basally, bearing midlength complex with dorsal window and with basal loop indistinct; apical portion with spatulate sclerite (Figs. 3 D, 3 E).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA41FFE4D7F1FBDDFD99FD47.taxon	materials_examined	Material examined. HOLOTYPE male: Brazil, Rio de Janeiro, Mangaratiba, Reserva Ecológica Rio das Pedras, 22 ° 59 ’ 29 ” S 44 ° 06 ’ 03 ” W, 23. v. 2009, J. L. Nessimian, light trap (DZRJ); PARATYPE: Brazil, Rio de Janeiro, Macaé, Córrego Duas Barras, 22 ° 15 ’ 52 ° S 42 ° 03 ’ 44 ” W, el. 217 m, 21. iii. 2009, B. H. L. Sampaio, G. A. Jardim, I. C. Gonçalves, V. P. Alecrim, J. L. Nessimian, light trap, 1 male (DZRJ). Additional material: Brazil, Paraná, Morretes, afl. do Rio Nhundiaquara, 25 ° 25 ’ 04 ” S 48 ° 54 ’ 05 ” W el. 91 m, 23. i. 2011, A. P. M. Santos, D. M. Takiya, J. L. Nessimian, L. L. Dumas, light trap, 1 male (DZRJ).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA41FFE4D7F1FBDDFD99FD47.taxon	discussion	Remarks. This species was originally described in Costatrichia, but other than the absence of a bulla in the costal vein of each forewing, it presents the features of the A. plaumanni Group, such as segment VII with a double ventromesal process (Fig. 3 A), a pair of long dorsolateral processes on segment IX (Fig. 3 C), and the inferior appendages short and not fused mesally (Fig. 3 A). The species has been transferred to Acostatrichia by Santos et al. (2016) based on phylogenetic studies, which indicated that both morphology and molecular data supported a close relationship between A. fluminensis and A. simulans (Santos et al. 2016). Santos & Nessimian (2010) also mentioned the absence of a subgenital plate in the original description, but the paratype and the additional specimen observed, which agree in all other aspects with the holotype, clearer present this structure. Acostatrichia fluminensis shares with A. plaumanni and A. simulans the similar general aspect of male genitalia, particularly the long and digitate pair of dorsolateral processes of segment IX, the presence of short preanal processes, each one with a long apical seta, and short and triangular inferior appendages. This species can be distinguished from these other two and from others in the A. plaumanni Group due to the dorsolateral processes of segment IX being strongly curved downward in lateral view (Fig. 3 C), and the phallus having an apical spatulated sclerite (Fig. 3 D).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA41FFE4D7F1FBDDFD99FD47.taxon	distribution	Distribution. Brazil (Fig. 16).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA42FFEBD7F1FCEFFCB2FEA8.taxon	description	Figs. 4 – 5, 16	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA42FFEBD7F1FCEFFCB2FEA8.taxon	description	Redescription. Length from front of head to tips of folded forewings 2.0 – 3.0 mm (n = 10). General color, in alcohol, light brown. Head unmodified. Ocelli 3 (Fig. 4 A). Antenna 19 - articulated; scape cylindrical, twice as long as wide, inner margin not produced; pedicel cylindrical (Fig. 4 A); flagellomeres cylindrical, unmodified. Forewings each with costal vein bearing short basal bulla (Fig. 4 B). Abdominal segment VII bearing two acute ventromesal processes, basal one shorter (Figs. 5 A, 5 E). Male genitalia. Segment VIII shorter dorsally than ventrally (Fig. 5 E); in ventral view, posterior margin of sternum truncate, without lateral processes (Fig. 5 A); tergum with scattered setae. Segment IX mostly within segment VIII, ventrally open; with pair of elongate dorsolateral processes, almost straight in ventral view (Fig. 5 A); in dorsal (Fig. 5 B) and lateral views (Fig. 5 C), each one with very long and stout apical seta. Preanal process digitate, each bearing very long seta (Fig. 5 C). Inferior appendages paired, short and triangular in ventral view (Fig. 5 A); without apical or basal processes. Subgenital plate, in ventral view quadrangular (Fig. 5 A); in lateral view triangular (Fig. 5 C). Tergum X membranous, posterior margin convex in dorsal view (Fig. 5 B); in lateral view slightly bilobed (Fig. 5 C). Phallus tubular basally, bearing midlength complex, with dorsal window and basal loop shorter than basal portion of phallus; apical portion with plate-like sclerite and more than 8 internal spines.	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA42FFEBD7F1FCEFFCB2FEA8.taxon	materials_examined	Material examined. Brazil, Sta. Catarina, Nova Teutonia, i. 1963, F. Plaumann, Flint det., 10 males (NMNH); Brasilien, Nova Teutonia, 27 ° 11 ’ B 52 ° 23 ’ L, xi. 63, Fritz Plaumann, Flint, 1975 det., 1 male (NMNH). Uruguay, Artigas, Arroyo de la Invernada, 24. ii. 1954, CS Carbonell leg., Flint 1982 det., 13 males (NMNH); Tacuarembó, Puntas Arroyo Laureles, 10. ii. 1954, CS Carbonell leg. Flint det., 16 males (NMNH).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA42FFEBD7F1FCEFFCB2FEA8.taxon	discussion	Remarks. Although the types were not examined, several specimens in the NMNH from the type locality and previously identified by Dr. Flint were studied. In addition, the illustrations and description provided by Mosely (1939) are with sufficient detail to recognize the species correctly. This species is the type species of the genus and in the phylogeny of Leucotrichiinae (Santos et al. 2016) has been found in a distinct clade, referred to here as the A. plaumanni Group. In this group, Acostatrichia plaumanni, A. simulans, and A. fluminensis share the presence of preanal processes, each one with a very long seta; and the long and digitate dorsolateral processes on segment IX, each one with a stout spine (Figs. 3 C, 5 C, 6 C). Acostatrichia plaumanni and A. simulans also share a short basal bulla on the costal vein of each forewing, absent in A. fluminensis. Acostatrichia plaumanni differs from these two and from other species in this group by the dorsolateral processes of segment IX (Figs. 5 A, 5 B, 5 C), which are shorter, posteriorly directed, and almost straight (in A. simulans, they are curved inwards in ventral and dorsal views), and by the phallus bearing about 8 apical spines (Figs. 5 D, 5 E).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA42FFEBD7F1FCEFFCB2FEA8.taxon	distribution	Distribution. Argentina, Brazil, and Uruguay (Fig. 16).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA4DFFEAD7F1FB78FCB2FD23.taxon	description	Figs. 6, 16	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA4DFFEAD7F1FB78FCB2FD23.taxon	description	Redescription. Length from front of head to tips of folded forewings 2.0 – 3.0 mm (n = 9). General color, in alcohol, light brown. Head unmodified. Ocelli 3. Antenna 19 - articulated; scape cylindrical, twice as long as wide, inner margin not produced; pedicel cylindrical; flagellomeres cylindrical, unmodified. Forewings each with costal vein bearing short basal bulla. Abdominal segment VII bearing two acute ventromesal processes, basal one shorter (Figs. 6 A, 6 C). Male genitalia. Segment VIII shorter dorsally than ventrally (Fig. 6 C); in ventral view, posterior margin of sternum with shallow median V-shaped incision (Fig. 6 A), without lateral processes; tergum with scattered setae. Segment IX mostly within segment VIII, ventrally open; with pair of elongate dorsolateral processes, gradually curved inwards in dorsal and ventral views (Figs. 6 A, 6 B), almost straight in lateral view (Fig. 6 C), each one with sinuous subapical spine (Figs. 6 A, 6 B, 6 C). Preanal processes digitate and each bearing very long seta (Fig. 6 C). Inferior appendages paired, short and triangular in ventral view, without apical or basal processes (Fig. 6 A). Subgenital plate, in ventral view broad and concave at apex (Fig. 6 A); in lateral view, triangular (Fig. 6 C). Tergum X membranous, posterior margin convex in dorsal view (Fig. 6 B), slightly bilobed in lateral view (Fig. 6 C). Phallus tubular basally, bearing midlength complex with dorsal window and basal loop shorter than basal portion of phallus; apical portion with Y-shaped sclerite and internal spine (Figs. 6 D, 6 E).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA4DFFEAD7F1FB78FCB2FD23.taxon	materials_examined	Material examined. Brazil, Santa Catarina, Nova Teutonia, ix. 1963, F Plaumann leg., Flint 1975 det., 1 male (NMNH); Nova Teutonia, i. 1963, F. Plaumann, Flint det., 6 males (NMNH). Argentina, Província Misiones, Salto Encantado Provincial Park, Arroyo Azul, 23 - 28. i. 2008, Angrisano & Sganga leg., Sganga 2012 det., 1 male (DZRJ). Uruguay, Artigas, Rio Cuareim, Sepulturas, 15. xii. 1952, CS Carbonell, Flint det., 1 male (NMNH).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA4DFFEAD7F1FB78FCB2FD23.taxon	discussion	Remarks. Acostatrichia simulans shows typical features of the A. plaumanni Species Group, such as the following: (1) a costal bulla in each forewing, (2) a double ventromesal process on segment VII, (3) the inferior appendages short and not fused to each other, and (4) a pair of long dorsolateral processes on segment IX. In the A. plaumanni Group, A. simulans shares more similarities in male genitalia with A. plaumanni and A. fluminensis, but it can be distinguished from those by a shallow median incision on the posterior margin of segment VIII in ventral view (Fig. 6 A); and by the dorsolateral processes of segment IX curved inwards in ventral and dorsal views, each one with a short sinuous subapical spine (Figs. 6 A, 6 B). This is the only Acostatrichia species with immature stages described (Angrisano & Sganga 2010). According to Angrisano & Sganga (2010), the larva is similar to those described for other Leucotrichiini genera, in particular to larvae of Zumatrichia Mosely 1937, but the A. simulans larva differs by having the frontoclypeus with a reticulate sculpturing and each tarsal claw with an enlarged basal seta.	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA4DFFEAD7F1FB78FCB2FD23.taxon	distribution	Distribution. Argentina, Brazil, and Uruguay (Fig. 16).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA4CFFEAD7F1FAFEFF5EF8E0.taxon	discussion	Remarks. In the descriptions of A. brevipenis Flint 1974 and A. fimbriata Flint 1974, Flint (1974) indicated that these two species constituted a particular group within the genus, differing in several aspects from the other species known until that time. Here, together with another 3 species (A. buborektala Oláh & Johanson 2011, A. digitata Thomson & Holzenthal 2012, A. tuskera Oláh & Flint 2012), they are placed into the A. brevipenis Group. This group is characterized by having the following features: (1) a costal bulla is usually absent from each forewing (present in A. brevipenis and A. tuskera); (2) abdominal segment VII has one long and somewhat capitate ventromesal process, usually with a rugose apex; (3) segment VIII has a pair of conspicuous ventrolateral processes; (4) the inferior appendages are fused to each other, usually with a pair of digitate apicolateral processes. In the phylogenetic analysis presented by Santos et al. (2016), species in the A. brevipenis Group did not cluster with those of the A. plaumanni Group. However, the placement of the A. brevipenis Group remained unclear, since the analyses had no resolution at this point (Santos et al. 2016). It is likely that the A. brevipenis Group will become a new genus or that its species will be transferred, but with the currently limited knowledge of Leucotrichiinae diversity and phylogeny, I prefer to clarify the morphological and taxonomic aspects before proposing a new genus name.	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA4CFFEAD7F1FD33FDC6FB69.taxon	description	Fig. 16	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA4CFFEAD7F1FD33FDC6FB69.taxon	discussion	Remarks. This species was described from Suriname and is known only from its holotype (not studied here). The male of A. spinifera has a costal bulla on each forewing, probably two small ventromesal processes on segment VII, a pair of long dorsolateral processes on segment IX, and inferior appendages short and not fused to each other (Flint 1974), being allocated here in the A. plaumanni Group. However, the male genitalia in A. spinifera are very distinctive, and can be easily distinguished from those of other Acostatrichia species by segment VIII having an acute median process on the posterior margin in ventral view, by bifid inferior appendages, and by the divided subgenital plate.	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA4CFFEAD7F1FD33FDC6FB69.taxon	distribution	Distribution. Suriname (Fig. 16).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA49FFEFD7F1FF56FCCCFA27.taxon	description	Figs. 7, 16	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA49FFEFD7F1FF56FCCCFA27.taxon	description	Redescription. Length from front of head to tips of folded forewings 2.0 – 2.5 mm (n = 3). General color, in alcohol, brown. Head unmodified. Ocelli 3. Antenna 20 - articulated; scape cylindrical, twice as long as wide, inner margin not produced; pedicel cylindrical; flagellomeres cylindrical, unmodified. Forewings each with costal vein bearing short basal bulla. Abdominal segment VII bearing very long ventromesal process, with fimbriate and capitate apex (Figs. 7 A, 7 C). Segment VIII shorter dorsally than ventrally; in ventral view, posterior margin of sternum slightly emarginated (Fig. 7 A); with pair of acute ventrolateral processes (Fig. 7 C); tergum with row of long setae (Fig. 7 B). Segment IX mostly within segment VIII, ventrally open; without dorsolateral processes (Fig. 7 C). Preanal process globose and bearing very long setae (Fig. 7 B). Inferior appendages fused with each other as plate, with shallow Ushaped incision on posterior margin in ventral view (Fig. 7 A); with pair of very long digitate lateral processes rising from apex (Fig. 7 A), upturned in lateral view (Fig. 7 C). Subgenital plate, in ventral view, broad, with V-shaped incision on posterior margin (Fig. 7 A); in lateral view, downturned (Fig. 7 C). Tergum X membranous, bilobed, dorsal lobe triangular, ventral lobe trapezoidal in dorsal view (Figs. 7 B, 7 C). Phallus tubular basally, bearing midlength complex, with dorsal window and basal loop as long as basal portion (Fig. 7 D); apical portion with slightly sclerotized sclerite and several very short internal spines (Figs. 7 D, 7 E).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA49FFEFD7F1FF56FCCCFA27.taxon	materials_examined	Material examined. PARATYPES: Surinam, Lawa R., Anapaike, 14 Nov. 1963, S. Ligorie at light, 2 males (NMNH). Additional material. Brazil, Bahia, Rio São Francisco, Sobradinho, 16. ii. 1989, E Rosa & W Terra leg., Flint, 1990 det., 1 male (NMNH). Roraima: Amajari, Est. Ecológica de Maracá, Alojamento, N 03 ° 21 ’ 44 ” W 61 ° 26 ’ 03 ”, el. 103 m, 24. iii. 2016, DM Takiya & APM Santos leg., light trap, APM Santos det., 1 male (DZRJ).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA49FFEFD7F1FF56FCCCFA27.taxon	discussion	Remarks. Acostatrichia brevipenis Flint 1974 was described from Suriname and then recorded from northern Brazil (Flint 1992) and from French Guiana (Oláh & Johanson 2011). Acostatrichia brevipenis shares with A. tuskera a short and acute ventromesal process on segment VIII (Fig. 7 B), which is long and not acute in the other 3 species in the A. brevipenis Group. This species can be also distinguished from the others by the apicolateral processes of the inferior appendages, which are very long, digitate, without spines or other processes, and directed upwards in lateral view (Fig. 7 C). Flint (1974) mentioned 2 internal spines in the posterior portion of the phallus, but it seems to be several very short spines (Figs. 7 D, 7 E). This also helps to differentiate this species from the others in the group, since these spines are absent (A. buborektala Oláh & Johanson 2011 and A. digitata Thomson & Holzenthal 2012) or longer (A. fimbriata Flint 1974 and A. tuskera Oláh & Flint 2012) in all other species.	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA49FFEFD7F1FF56FCCCFA27.taxon	distribution	Distribution. Brazil, French Guiana, Suriname (Fig. 16).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA49FFECD7F1F9CFFD03FB9C.taxon	description	Figs. 8, 16	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA49FFECD7F1F9CFFD03FB9C.taxon	description	Redescription. Length from front of head to tips of folded forewings 2.3 mm (n = 1). General color, in alcohol, light brown. Head unmodified. Ocelli 3. Antenna 20 - articulated; scape cylindrical, twice as long as wide, inner margin not produced; pedicel cylindrical; flagellomeres cylindrical, unmodified. Forewing with costal vein simple, unmodified. Abdominal segment VII bearing very long ventromesal process, with slightly capitate apex (Figs. 8 A, 8 E). Segment VIII shorter dorsally than ventrally (Fig. 8 C); in ventral view, posterior margin of sternum truncate (Fig. 8 A); with a pair of long ventrolateral processes, each bearing extremely long seta on basal third and slightly enlarged at apex (Figs. 8 A, 8 C); tergum with transverse row of long setae (Fig. 8 B). Segment IX mostly within segment VIII, ventrally open; without dorsolateral processes (Figs. 8 B, 8 C). Preanal process globose and bearing very long setae (Fig. 8 B). Inferior appendages paired but fused with each other basally, elongate, narrowing to apex in lateral view (Fig. 8 A); without apical or basal processes (Fig. 8 A). Subgenital plate, in ventral view, broad, with truncate apex (Fig. 8 A); in lateral view, slightly downturned (Fig. 8 C). Tergum X membranous, triangular in dorsal view (Fig. 8 B). Phallus tubular basally, bearing midlength complex, with dorsal window and basal loop shorter than basal portion of phallus (Fig. 8 D); apical portion with slightly sclerotized sclerite and with no internal spines (Figs. 8 D, 8 E).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA49FFECD7F1F9CFFD03FB9C.taxon	materials_examined	Material examined. Brazil: Amazonas, AM 010, km. 246, 15 – 16 Jul 1979, J. Arias leg., Oláh det., 1 male (NMNH).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA49FFECD7F1F9CFFD03FB9C.taxon	discussion	Remarks. Oláh & Johanson (2011) described this species based only on the holotype from Peru. Oláh & Flint (2012) recorded this species from northern Brazil, indicating 8 males in NMNH, but only one specimen of A. buborektala Oláh & Johanson, 2011 was located in this collection. This non-type specimen from Brazil agrees with the original description and it was used here to provide illustrations and the description above. Due to the long and capitate ventromesal process on segment VII (Fig. 8 C), the presence of a pair of ventrolateral processes on segment VIII (Figs. 8 A, 8 E), and the inferior appendages fused with each other, at least basally (Fig. 8 A), this species is placed in the A. brevipenis Group. However, A. buborektala is very distinctive from the others in this group and in the genus as a whole. Acostatrichia buborektala differs from other species in the A. brevipenis Group by the inferior appendages fused to each other only basally (Fig. 8 A), instead of completely fused as a plate. In this respect, this species is similar to those in A. cerna Group, but in A. buborektala the inferior appendages lack a rod-like lateral process, typical for the A. cerna Group. Acostatrichia buborektala can be easily distinguished from other Acostatrichia species by the long ventrolateral processes of segment VIII, each one with an extremely long seta arising from basal half of the process (Figs. 8 A, 8 C).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA49FFECD7F1F9CFFD03FB9C.taxon	distribution	Distribution. Brazil and Peru (Fig. 16).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA4AFFECD7F1FBAAFDCFF9E5.taxon	description	Fig. 16	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA4AFFECD7F1FBAAFDCFF9E5.taxon	discussion	Remarks. This species is known only from its holotype collected in Venezuela. The original description and illustrations are quite detailed, and they are not duplicated here (see Thomson & Holzenthal 2012). Acostatrichia digitata shows the main features of the A. brevipenis Group: the long and somewhat capitate ventromesal process on segment VII; segment VIII with ventrolateral processes; and the inferior appendages fused to each other with an apicolateral projection. The species is easily distinguished from the others by the ventrolateral processes of segment VIII each bearing a digitate lobe (Thomson & Holzenthal 2012) and in addition, the subgenital plate is divided into two arms, in ventral view.	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA4AFFECD7F1FBAAFDCFF9E5.taxon	distribution	Distribution. Venezuela (Fig. 16).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA4AFFF3D7F1F971FDC6FC90.taxon	description	Figs. 9, 16	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA4AFFF3D7F1F971FDC6FC90.taxon	description	Redescription. Length from front of head to tips of folded forewings 2 mm (n = 1). General color, in alcohol, light brown. Head unmodified. Ocelli 3. Antennae broken. Forewings each with costal vein simple, unmodified. Abdominal segment VII bearing very long ventromesal process, with fimbriate and capitate apex (Fig. 9 A). Segment VIII shorter dorsally than ventrally; in ventral view, posterior margin of sternum truncate; with pair of long ventrolateral processes, each bearing acute projection on median area and fimbriate projection at apex; tergum with scattered setae. Segment IX mostly within segment VIII, ventrally open; without dorsolateral processes. Preanal process obliquely truncate and bearing very long setae (Fig. 9 A). Inferior appendages fused with each other as plate, with shallow U-shaped incision on posterior margin in ventral view (Fig. 9 B); with pair of very long digitate lateral processes rising from apex (Fig. 9 B); in lateral view, upturned. Subgenital plate, in ventral view, broad and rounded at apex; in lateral view, slightly downturned (Fig. 9 A). Tergum X membranous, bilobed, both lobes rounded in dorsal view. Phallus tubular basally, bearing midlength complex, with dorsal window, basal loop indistinct; apical portion with pair of long internal spines.	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA4AFFF3D7F1F971FDC6FC90.taxon	materials_examined	Material examined. PARATYPE: Surinam, Coppename River, Raleigh Falls, 9 July 1963, D. C. Geijskes leg., 1 male, partially damaged (NMNH).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA4AFFF3D7F1F971FDC6FC90.taxon	discussion	Remarks. This species is known from the male type specimens from Suriname. The paratype studied is partially damaged and missing some genital structures, preventing preparation of a complete set of illustrations. The description provided above was made based on this specimen and on the original description. Acostatrichia fimbriata is closely related to A. brevipenis as mentioned by Flint (1974). This species is easily distinguished from A. brevipenis and other Acostatrichia species by the ventrolateral processes of segment VIII each having a dorsal acute projection and a fimbriate apex.	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA4AFFF3D7F1F971FDC6FC90.taxon	distribution	Distribution. Suriname (Fig. 16).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA55FFF1D7F1FA30FD99FC90.taxon	description	Figs. 10, 16	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA55FFF1D7F1FA30FD99FC90.taxon	description	Redescription. Length from front of head to tips of folded forewings 3 mm (n = 3). General color, in alcohol, dark brown. Head unmodified. Ocelli 3. Antennae each 20 - articulated; scape cylindrical, as long as wide, inner margin not produced; pedicel cylindrical; flagellomeres cylindrical, unmodified. Forewings each with costal vein bearing short basal bulla. Abdominal segment VII bearing very long ventromesal process, with capitate apex (Figs. 10 A, 10 C). Segment VIII shorter dorsally than ventrally (Fig. 10 C); in ventral view, posterior margin of sternum truncate (Fig. 10 A); with pair of ventrolateral processes with acute apices (Figs. 10 A, 10 C); tergum with transverse row of long setae (Fig. 10 B). Segment IX mostly within segment VIII, ventrally open; without dorsolateral processes (Figs. 10 B, 10 C). Preanal processes globose and bearing very long setae (Figs. 10 B, 10 C). Inferior appendages fused with each other as plate with shallow U-shaped incision on posterior margin in ventral view (Fig. 10 A); each with very long digitate lateral process rising from apex and bearing 3 – 4 subapical spine-like projections at midlength (Fig. 10 A); in lateral view, upturned (Fig. 10 C). Subgenital plate, in ventral view, broad, rounded and with small median triangular projection at apex (Fig. 10 A); in lateral view, slightly downturned (Fig. 10 C). Tergum X membranous, bilobed, both lobes rounded in dorsal view (Fig. 10 B). Phallus tubular basally, bearing midlength complex, with dorsal window and basal loop shorter than basal portion of phallus (Fig. 10 D); apical portion without conspicuous sclerites and with several internal spines (Figs. 10 D, 10 E).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA55FFF1D7F1FA30FD99FC90.taxon	materials_examined	Material examined. PARATYPES: Brazil, Sao Paulo, Piracicaba, 12. III. 1965, C. A. Triplehorn leg., 3 males (NMNH).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA55FFF1D7F1FA30FD99FC90.taxon	discussion	Remarks. As mentioned before, within the A. brevipenis Group, Acostatrichia brevipenis and A. tuskera appear to be closely related to each other, sharing similarities in the general aspect of male genitalia. Both species have the ventrolateral processes of segment VIII short and acute (Figs. 7 C, 10 C), whereas for the other species in the group those processes are much longer and not acute. Acostatrichia tuskera can be distinguished from A. brevipenis and other Acostatrichia species by the long apicolateral processes of the inferior appendages, which are curved inwards, in ventral view (Fig. 10 A), and have 3 or 4 spines at midlength (Figs. 10 A, 10 C).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA55FFF1D7F1FA30FD99FC90.taxon	distribution	Distribution. Brazil (Fig. 16).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA57FFF1D7F1FCA6FEE8FA4B.taxon	discussion	Remarks. The four species here included in the A. cerna Group were only recently described by Oláh & Flint (2012) and they are very similar in the general aspect of male genitalia. This species group is defined by the adult male having the following characteristics: (1) segment VII with a long ventromesal process; (2) the posterior margin of segment VIII has a deep U-shaped or V-shaped incision in ventral view; (3) segment IX has a pair of long dorsolateral processes, each ending in one or more robust spines; and (4) the inferior appendages are fused to each other only in their basal area and (5) each has a long rod-like lateral process. In some morphological features, e. g. the inferior appendages with lateral processes, the conspicuous subgenital plate, the internal spines in the phallus, this group resembles species of Zumatrichia. In fact, the phylogenetic hypotheses from Bayesian Inference presented by Santos et al. (2016) indicate this, with “ Leucotrichiinae genus B ” (= Acostatrichia ujasa Oláh & Flint 2012) as sister group to the Zumatrichia clade. However, this species (and others in the group) lacks the synapomorphic features of Zumatrichia, as the modified scape and the presence of preanal processes (Santos et al. 2016). On the other hand, the results of parsimony analyses presented by Santos et al. (2016) show “ Leucotrichiinae genus B ” closely related to Acostatrichia species. Because of the uncertainty about their phylogenetic affinities, the original assignment to Acostatrichia is followed here, but the A. cerna Group probably constitutes a distinct lineage within the leucotrichiines.	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA57FFF7D7F1F9DAFDB0FC0C.taxon	description	Figs. 11, 16	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA57FFF7D7F1F9DAFDB0FC0C.taxon	description	Redescription. Length from front of head to tips of folded forewings 4 mm (n = 2). Specimens examined completely cleared. General color, in alcohol, according to Oláh & Flint (2012), brown. Head unmodified. Ocelli 3. Antenna broken; scape cylindrical, twice as long as wide, inner margin not produced; pedicel cylindrical. Forewings each with costal vein simple, unmodified. Abdominal segment VII bearing long ventromesal process, with acute apex (Figs. 11 A, 11 C). Segment VIII shorter dorsally than ventrally (Fig. 11 C); in ventral view, posterior margin of sternum with two lobes forming median deep U-shaped incision surrounded by short setae (Fig. 11 A); without lateral processes, but with apicoventral margins projecting in lateral view (Fig. 11 C); tergum with short stout setae (Fig. 11 B). Segment IX mostly within segment VIII, ventrally open; with pair of long digitiform dorsolateral processes with slightly dilated apices, almost straight in ventral and dorsal views (Figs. 11 A, 11 B), slightly upturned in lateral view (Fig. 11 C); each with four long, strong, and curved apical spines (Figs. 11 A – 11 C). Preanal process absent (Fig. 11 B). Inferior appendages fused with each other only basally, distal portions free, each short, apically rounded and with incision on inner margin (Fig. 11 A); with pair of very long rod-like lateral processes rising from basal area, in ventral view slightly dilated at apex (Fig. 11 A); in lateral view, sinuous and slightly upturned (Fig. 11 C). Subgenital plate, in ventral view, broad, with a sclerotized belt basally and concave at apex (Fig. 11 A); in lateral view, directed posterad and rounded apically (Fig. 11 C). Tergum X membranous, pentagonal in dorsal view (Fig. 11 B). Phallus tubular basally, bearing midlength complex, with dorsal window and basal loop as long as basal portion (Fig. 11 D); apical portion with conspicuous sclerite trifid at apex and two pairs of long straight internal spines (Figs. 11 D, 11 E).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA57FFF7D7F1F9DAFDB0FC0C.taxon	materials_examined	Material examined. HOLOTYPE male: Ecuador, Los Rios Prov., Quevedo (56 km N), Rio Palenque Biological Station, 250 m, blacklight at riverbed, 28 – 29 July 1976, Jeffrey Cohen leg. (NMNH); PARATYPE: Ecuador, Cotop. Quevedo (36 km NE), 21. VII. 1976, blacklight, Jeffrey Cohen leg., 1 male (NMNH).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA57FFF7D7F1F9DAFDB0FC0C.taxon	discussion	Remarks. Within this species group, Acostatrichia cerna Oláh & Flint 2012 is more similar to A. ujasa, both species having four conspicuous apical spines on each of the dorsolateral processes of segment IX (Figs. 11 A, 14 A), whereas A. darda and A. kihara Oláh & Flint 2012 have only one apical spine on each of these processes (Figs. 12 A, 13 A). Acostatrichia cerna can be distinguished from A. ujasa by the smaller spines on each dorsolateral process of segment IX and by the number and size of internal spines in the phallus: four long spines in A. cerna and several smaller spines in A. ujasa.	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA57FFF7D7F1F9DAFDB0FC0C.taxon	distribution	Distribution. Ecuador (Fig. 16).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA51FFF5D7F1FC1AFD1BFC2F.taxon	description	Figs. 12, 15 A, 16	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA51FFF5D7F1FC1AFD1BFC2F.taxon	description	Redescription. Length from front of head to tips of folded forewings 3.5 – 4.0 mm (n = 2). General color, in alcohol, brown. Pinned specimen brown, with spots of green setae on head, thorax, and wings (Fig. 15 A). Head unmodified. Ocelli 3. Antennae each 20 - articulated; scape cylindrical, twice as long as wide, inner margin not produced; pedicel cylindrical; flagellomeres cylindrical, unmodified. Forewings each with costal vein simple, unmodified. Abdominal segment VII bearing long ventromesal process, with acute apex (Figs. 12 A, 12 C). Segment VIII shorter dorsally than ventrally (Fig. 12 C); in ventral view, posterior margin of sternum with two lobes forming deep U-shaped incision medially surrounded by short setae (Fig. 12 A); without lateral processes, but with apicoventral margin projecting in lateral view (Fig. 12 C); tergum with scattered setae (Fig. 12 B). Segment IX mostly within segment VIII, ventrally open; with pair of long digitiform dorsolateral processes with small projection on apex, slightly curved inwards in ventral and dorsal views (Figs. 12 A, 12 B), upturned in lateral view (Fig. 12 C); each with strong geniculate apical spine (Fig. 12 A). Preanal processes absent (Fig. 12 B). Inferior appendages fused with each other only basally, distal portion free, each club-shaped, apically rounded with acute internal corner (Fig. 12 A); with pair of very long rod-like lateral processes rising from basal area (Fig. 12 A); in lateral view, upturned (Fig. 12 C). Subgenital plate, in ventral view, broad, with V-shaped incision on posterior margin (Fig. 12 A); in lateral view, directed posterad and obliquely truncate at apex (Fig. 12 C). Tergum X membranous, pentagonal in dorsal view (Fig. 12 B). Phallus tubular basally, bearing midlength complex, with dorsal window and basal loop as long as basal portion (Fig. 12 D); apical portion with conspicuous, median sclerite downturned at apex (Fig. 12 E), and a pair of long curved internal spines forming forceps in dorsal view (Fig. 12 D).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA51FFF5D7F1FC1AFD1BFC2F.taxon	materials_examined	Material examined. HOLOTYPE male: Peru, Cusco, Pilcopata, premontane moist forest, 600 m, 8 – 10. XII. 1979, J. B. Heppner leg. (NMNH); PARATYPE: Ecuador, Past., Puyo, 18 May 1977, blacklight, P. J. Spangler & D. R. Givens leg., # 56, 1 male (only the abdomen) (NMNH). Acostatrichia hosulaba specimens: HOLOTYPE male: Ecuador, Past., Puyo, 14 May 1977, blacklight, P. J. Spangler & D. R. Givens leg. # 44 (NMNH); PARATYPE: Ecuador, Past., Puyo, 9 May 1977, blacklight, P. J. Spangler & D. R. Givens leg. # 23, 1 male (NMNH). Acostatrichia pika specimens: HOLOTYPE male: Ecuador, Pich., Sto. Domingo de los Colorados, 14 Km E, 5 July 1975, Langley & Cohen leg. (NMNH); PARATYPE: same data, 1 male pinned (NMNH).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA51FFF5D7F1FC1AFD1BFC2F.taxon	discussion	Remarks. The subjective synonymy of Acostatrichia darda, A. hosulaba, and A. pika is proposed here based on the examination of the type material of these three nominal species. In the original description, Oláh & Flint (2012) presented differences between A. darda and A. pika, but those differences are not evident in the specimens. Nothing is mentioned about similarities among A. hosulaba and these other two species. Since these 3 names were proposed in the same paper, in accordance to the Article 24.2 of the International Code of Zoological Nomenclature (ICZN), the precedence of the name Acostatrichia darda is fixed here over the other two names. Acostatrichia darda can be distinguished from A. cerna and A. ujasa by the dorsolateral processes of segment IX each having only one apical spine (Fig. 12 A) — with four spines in these other two species — and by the phallus with 2 long and curved internal spines (Fig. 12 D) — four in A. cerna and several smaller spines in A. ujasa. In the A. cerna Group, A. darda is more similar to A. kihara, but can be distinguished from that species by the dorsolateral processes of segment IX, with a geniculate apical spine and a small spine-like projection in A. darda (Fig. 12 A) and only a straight apical spine in A. kihara (Fig. 13 A), and by the lateral processes of the inferior appendages slightly lanceolate at apex in A. darda (Fig. 12 A) and more digitiform in A. kihara (Fig. 13 A).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA51FFF5D7F1FC1AFD1BFC2F.taxon	distribution	Distribution. Ecuador and Peru (Fig. 16).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA53FFFBD7F1FC37FD5BFE27.taxon	description	Figs. 13, 15 B, 16	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA53FFFBD7F1FC37FD5BFE27.taxon	description	Redescription. Length 3.3 – 3.5 mm (n = 2). General color, in alcohol, brown. Pinned specimen brown, with spots of green setae on head, thorax, and wings (Fig. 15 B). Head unmodified. Ocelli 3. Antennae each 20 - articulated; scape cylindrical, twice as long as wide, inner margin not produced; pedicel cylindrical; flagellomeres cylindrical, unmodified. Forewings each with costal vein simple, unmodified. Abdominal segment VII bearing long ventromesal process, with acute apex (Figs. 13 A, 13 C). Segment VIII shorter dorsally than ventrally (Fig. 13 C); in ventral view, posterior margin of sternum with two lobes forming a median deep V-shaped incision surrounded by short setae (Fig. 13 A); without lateral processes, but with apicoventral margin projecting in lateral view (Fig. 13 C); tergum with scattered setae (Fig. 13 B). Segment IX mostly within segment VIII, ventrally open, with pair of long digitiform dorsolateral processes, slightly curved inward in ventral and dorsal views (Figs. 13 A, 13 B), slightly upturned in lateral view (Fig. 13 C); each with strong apical spine (Fig. 13 C). Preanal process absent (Fig. 13 B). Inferior appendages fused with each other only basally, each distal portion free, club-shaped, apically rounded with acute internal corner (Fig. 13 A); with pair of very long rod-like lateral processes rising from basal area (Fig. 13 A); in lateral view, straight and posteriorly directed (Fig. 13 C). Subgenital plate, in ventral view, broad and concave at apex (Fig. 13 A); in lateral view, directed posterad and rounded apically (Fig. 13 C). Tergum X membranous, bilobed, dorsal lobe quadrangular, ventral lobe pentagonal in dorsal view (Fig. 13 B). Phallus tubular basally, bearing midlength complex, with dorsal window and basal loop as long as basal portion (Fig. 13 D); apical portion with conspicuous sclerite having U-shaped incision at apex, several short internal spines (Figs. 13 D, 13 E), and pair of long curved internal spines, forming forceps in dorsal view (Fig. 13 D).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA53FFFBD7F1FC37FD5BFE27.taxon	materials_examined	Material examined. HOLOTYPE male: Ecuador, Napo, Pano, 580 m, 12 Sep 1990, blacklight at stream, P. J. Spangler leg., colln # 19 (NMNH); PARATYPES: Venezuela, BA., Rio Sto. Domingo, Barinas, 17 February 1976, C. M. & O. S. Flint, Jr. leg., 1 male pinned, 1 male alcohol (NMNH).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA53FFFBD7F1FC37FD5BFE27.taxon	discussion	Remarks. As mentioned before, within the A. cerna Group, this and the preceding species share several features of male genitalia, for example, the presence of an apical spine on each dorsolateral process of segment IX (Figs. 12 A, 13 A), the general aspect of inferior appendages (Figs. 12 A, 13 A), and the phallus with a pair of long and curved internal spines (Figs. 12 D, 13 D). However, A. kihara can be recognized by the spines of the dorsolateral processes of segment IX being straight (Fig. 13 A), not geniculate (Fig. 12 A), by the lateral processes of the inferior appendages being more digitiform in ventral (Fig. 13 A) and lateral views (Fig. 13 C), and by the presence of several short spines in the phallus near the base of the internal sclerite (Fig. 13 D).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA53FFFBD7F1FC37FD5BFE27.taxon	distribution	Distribution. Ecuador and Venezuela (Fig. 16).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA5DFFFBD7F1FE3AFD1BF965.taxon	description	Figs. 14, 15 C, 16	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA5DFFFBD7F1FE3AFD1BF965.taxon	description	Redescription. Length from front of head to tips of folded forewings 4.0 – 4.5 mm (n = 6). General color, in alcohol, brown. Pinned specimen brown, with spots of green setae on head, thorax, and wings (Fig. 15 C). Head unmodified. Ocelli 3. Antennae each 21 - articulated; scape cylindrical, twice as long as wide, inner margin not produced; pedicel cylindrical; flagellomeres cylindrical, unmodified. Forewings each with costal vein simple, unmodified. Abdominal segment VII bearing long ventromesal process, with acute apex (Figs. 14 A, 14 C). Segment VIII shorter dorsally than ventrally (Fig. 14 C); in ventral view, posterior margin of sternum with two lobes forming deep median U-shaped incision surrounded by short setae (Fig. 14 A); without lateral processes, but with apicoventral margin projecting in lateral view (Fig. 14 C); tergum with transverse row of long setae (Fig. 14 B). Segment IX mostly within segment VIII, ventrally open, with pair of long digitiform dorsolateral processes with slightly dilated apices, slightly curved gradually laterad except apices curved slightly inwards in ventral and dorsal views (Figs. 14 A, 14 B), slightly upturned in lateral view (Fig. 14 C); each with four very long, strong, and curved apical spines (Figs. 14 A – 14 C). Preanal process absent (Fig. 14 B). Inferior appendages fused with each other only basally, distal portions free, each short, apically rounded and with subapical incision on inner margin (Fig. 14 A); with pair of very long rod-like lateral processes rising from basal area, dilatated at apices (Fig. 14 A); in lateral view, upturned (Fig. 14 C). Subgenital plate, in ventral view, broad, with sclerotized belt basally and with V-shaped incision on posterior margin (Fig. 14 A); in lateral view, directed posterad and rounded apically (Fig. 14 C). Tergum X membranous, bilobed, dorsal lobe quadrangular, ventral lobe pentagonal in dorsal view (Fig. 14 B). Phallus tubular basally, bearing midlength complex, with dorsal window and basal loop as long as basal portion (Fig. 14 D); apical portion with plate-like sclerite and more than eight internal spines (Figs. 14 D, 14 E).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA5DFFFBD7F1FE3AFD1BF965.taxon	materials_examined	Material examined. HOLOTYPE male: Ecuador, Past., Puyo (27 Kms. N.) Est. Fluv. Metrica, 4 February 1976, Spangler et al. leg. (NMNH); PARATYPE: same data, 1 male pinned (NMNH). Additional material. Peru, Cusco, Quincemil, stream, S 13 ° 13 ’ 03 ” W 73 ° 43 ’ 40 ”, el. 633 m, 20. viii. 2012, light trap, APM Santos & DM Takiya leg., 3 males (DZRJ).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA5DFFFBD7F1FE3AFD1BF965.taxon	discussion	Remarks. This species shares with A. cerna similarities in the general aspect of the male genitalia, particularly, the presence of three or four conspicuous apical spines on each dorsolateral process of segment IX (Figs. 11 A, 14 A). However, these two species can be distinguished from each other by those apical spines, much longer in A. ujasa, and also by phallus, in A. ujasa with more than eight internal spines (Fig. 14 D), whereas in A. cerna the phallus has four long internal spines (Fig. 11 D).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA5DFFFBD7F1FE3AFD1BF965.taxon	distribution	Distribution. Ecuador and Peru (Fig. 16).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA5FFFF9D7F1FB29FBB1F8C7.taxon	materials_examined	Material examined. Costatrichia nelsonferreirai: HOLOTYPE male: Brazil, Pará: Canaã dos Carajás (Floresta Nacional — FLONA — de Carajás, lagoa Redonda, 06 ° 21 ’ 20.7 ” S, 50 ° 23 ’ 26.7 ” W, 705 m). Acostatrichia ketvilla: PARATYPE: Brazil: Pará State, Rio Xingu Camp, circa. 60 km South Altamira, 52 ° 22 ’ W, 3 ° 39 ’ S, 13 – 21. X. 1986, leg. P. J. SPANGLER & O. S. FLINT, Jr. 1 male, pinned (NMNH).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA5FFFF9D7F1FB29FBB1F8C7.taxon	discussion	Remarks. Costatrichia nelsonferreirai was described from northern Brazil (Pará State), as the same state as Acostatrichia ketvilla. In the original description of A. ketvilla, a small bulla on each forewing costal vein and “ no dilatation ” on antennal articles were mentioned (Oláh & Flint 2012). However, examination of a paratype revealed a typical antennal modification of Costatrichia species: the median articles of the antennae are flattened and expanded dorsoventrally. In addition, the forewing shows a conspicuous reflexed costal vein, another Costatrichia feature. There are no differences in the male genitalia of these two named species, so that I propose here the subjective synonymy of Acostatrichia ketvilla with senior synonym Costatrichia nelsonferreirai.	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA5EFFF8D7F1FF56FEAFFD99.taxon	materials_examined	Material examined: HOLOTYPE male: Guayna: Moco-Moco, 30 km East Lethem, 3 ° 18.2 ’ N 59 ° 39.0 ’ W, 3 – 6. IV. 1994, taken by net in daytime, leg. O. S. Flint Jr. (NMNH). PARATYPES: Guyana, Karanambo, Rupununi River, 3 ° 45.1 ’ N, 59 ° 19.6 ’ W, 31. III- 2. IV. 1994, at MV light, O. S. Flint Jr. 3 males, pinned (NMNH).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA5EFFF8D7F1FF56FEAFFD99.taxon	discussion	Remarks. Although the specimens have simple antennae, they have the reflexed costal vein on each forewing, typical of Costatrichia species. Male genitalia are also more similar to the Costatrichia pattern than to any Acostatrichia. The species is probably related to C. hamulifera (Flint 1983) and therefore it is being transferred to Costatrichia.	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA59FFFFD7F1FF56FD3AFE65.taxon	materials_examined	Material examined: HOLOTYPE male: Venezuela: Bolivar State, Rio Caroni at Paso Caruachi, 9. II. 1976, leg. C. M. & O. S. Flint. PARATYPES: same data as holotype, 2 males (NMNH).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA59FFFFD7F1FF56FD3AFE65.taxon	discussion	Remarks. This species also has the typical forewing modification of Costatrichia (costal vein reflexed) and the male genitalia are very similar to those of Costatrichia hamulifera, if not identical. For this reason, this species is also removed from Acostatrichia to Costatrichia.	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA59FFFFD7F1FDF1FD26FC77.taxon	materials_examined	Material examined: HOLOTYPE male: Panama, Barro Colorado Island, Snyder-Molino trail, marker 3, light trap, 2 – 8. XII. 1987, leg. H. Wolda (NMNH).	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
D40B8780CA59FFFFD7F1FDF1FD26FC77.taxon	discussion	Remarks. Based on male genitalia, this species seems to belong to an intriguing group of species, now assigned to Leucotrichia, including L. zopilote (Holzenthal & Harris 1999) and L. falsa (Santos, Takiya & Nessimian 2013). Those species are very distinctive from any other Leucotrichia species, but phylogenetic analyses with morphological and molecular data strongly support this placement (Santos et al. 2016). Due to the similarities in male genitalia of Acostatrichia topora and these two Leucotrichia species, especially the processes of segments VIII and IX, this species is formally transferred to Leucotrichia.	en	Santos, Allan Paulo Moreira (2020): A review of the Neotropical microcaddisfly genus Acostatrichia Mosely, 1939 with description of a new species from Brazil (Trichoptera: Hydroptilidae: Leucotrichiinae). Zootaxa 4755 (2): 201-230, DOI: 10.11646/zootaxa.4755.2.1
