Barolineocerus dercyae, Praciano & Dietrich & Takiya, 2025

Praciano, Daniel Lucas, Dietrich, Christopher H. & Takiya, Daniela Maeda, 2025, Taxonomic revision of the Neotropical leafhopper genus Barolineocerus Freytag, 2008 (Hemiptera: Cicadellidae: Eurymelinae: Chiasmodolini), with descriptions of three new species and an updated key to species, Zootaxa 5653 (4), pp. 451-485 : 470-473

Barolineocerus dercyae sp. nov.

( Figs. 3G–I , 12A–N )

Type locality: Reserva Florestal Adolpho Ducke, Manaus, Amazonas, Brazil.

Diagnosis. Pronotal macula almost extends to hind margin of pronotum ( Fig. 3G ). Claval macula extends to scutellum apex ( Fig. 3G ). Abdominal sternite II apodeme extending slightly beyond posterior margin of sternite III ( Fig. 12B ). Pygofer posterior margin without ventral process; with short median process, with subapical portion globular with a spine-like process ( Figs. 12C–E ). Valve with anterior and posterior margins sinuous ( Figs. 12F ). Subgenital plate without dorsal process; apex rounded ( Figs. 12G–H ).Aedeagus with dorsal median process; without dorsal subapical ridge; with pair of preapical lateral rounded processes ( Figs. 12L–N ). Anal tube, laterobasal process with base sinuous at anterior margin, apex angulate at anterior margin ( Figs. 12C–D ).

Measurements (mm). Holotype male, total length (to apex of forewing): 4.84; median length of crown: 0.23; length of crown close to eyes: 0.21; width of head: 1.91; width of crown between eyes: 1.11; length of pronotum: 0.48; length of scutellum: 1.04; width of pronotum: 1.75; width of scutellum: 1.42; length of face: 1.10; width of face between eyes: 1.11; distance between ocelli: 0.29; ocellocular distance: 0.37; length of clypeus: 0.40; basal width of clypeus: 0.27; apical width of clypeus: 0.32; length of forewing: 4.35. Males (n= 7), total length (to apex of forewing): 4.84–5.25; median length of crown: 0.23–0.29; length of crown close to eyes: 0.21–0.24; width of head: 1.86–1.93; width of crown between eyes: 1.11–1.18; length of pronotum: 0.48–0.73; length of scutellum: 0.93–1.04; width of pronotum: 1.74–1.86; width of scutellum: 1.28–1.52; length of face: 1.10–1.21; width of face between eyes: 1.11–1.14; distance between ocelli: 0.29–0.36; ocellocular distance: 0.34–0.37; length of clypeus: 0.40–0.43; basal width of clypeus: 0.25–0.27; apical width of clypeus: 0.32–0.38; length of forewing: 4.16–4.45.

Coloration (holotype). Body color pattern following genus description, with following exceptions. Gena light brown laterally, and white close to the eye ( Figs. 3I ). Pronotum macula extended almost to posterior margin ( Fig. 3G ). Forewing claval macula extended to scutellum apex ( Fig. 3G ).

Description (holotype). Crown short, median length 0.21x shorter than interocular width; slightly wider (1.1x) than pronotum. Face approximately as long as wide between eyes; distance between ocelli approximately 0.2x shorter than ocellocular distance. Clypeus approximately 1.2x wider apically than basally. Pronotum 3.7x longer than wide; approximately 1.1x longer than crown. Scutellum approximately 1.4x longer than wide. Hind tibia AD row with 6 cucullate setae; PD row with 16 cucullate setae. Other characters as in generic description.

Male terminalia. Pygofer triangular, in lateral view; posterior margin without ventral process; with short median process, directed dorsally, which has subapical portion inflated and globular with a spine-like process projected internally ( Figs. 12C–E ). Valve with anterior and posterior margins sinuous ( Fig. 12F ). Subgenital plate reniform, in lateral view; without dorsal process; apex rounded in lateral view ( Figs. 12G–H ). Connective stem short and broad ( Figs. 12I–J ). Style slender and long; apex truncated ( Figs. 12I, K ). Aedeagus with dorsal median process; without dorsal subapical ridge; with pair of preapical lateral rounded processes ( Figs. 12L–N ). Anal tube, laterobasal process with base sinuous at anterior margin, apex without angulate at anterior margin ( Figs. 12C–D ). Other characters as in generic description.

Etymology. Maria Dercy Godinho Guimarães (1949–2019) was a dedicated Amazonian woman who staunchly defended a peasant community in the heart of the Amazon Rainforest. She actively fought against the expansion of soya monoculture in Santarém, Pará. Her commitment extended to family agricultural production, where she played a vital role in the Sindicato dos Trabalhadores e Trabalhadoras Rurais de Santarém. Maria Dercy’s environmental activism and tireless efforts have inspired the naming of this species of leafhopper, ensuring that her legacy endures for eternity.

Remarks. Paratypes have hind tibia AD row with 5–6 cucullate setae and PD row with 9–16 cucullate setae.

Barolineocerus dercyae sp. nov. shares similarities with B. chiasmus , B. furcatus , B. ornatus , B. chicomendesi sp. nov., and B. digitatus sp. nov. as mentioned earlier. This species is very close to B. furcatus , especially in the general shape and size of the pygofer posterior process. However, B. dercyae sp. nov. distinguishes itself from other species by the following unique combination of characteristics: apex of median pygofer processes inflated and globular with a spine-like process ( Figs. 12C–E ) and subgenital plates with rounded apex ( Fig. 12G ).

Distribution. Brazil (Amazonas, Rondônia); Ecuador (Orellana); Peru (Madre de Dios).

Type material. 1♂, holotype, Brazil “AM [Amazonas]: Manaus, R. [Reserva Florestal Adolpho] Ducke \ 14– 18.xi.2009 \ O. EVANGELISTA”, INPA .

Paratypes: 1♂, “ BRASIL, Amazonas State \ Rio Abacaxis, Paxiúba \ 04°28'48"S 058°34'24"W \ 02–03.VI.2008 \ D.M. Takiya light”, INPA ; 1♂, “ Brasil , AM, Novo Airão \ 02°38'39"S 60°56'07"W; \ 27–28. viii. 2011. \ Armadilha luminosa móvel, \ 21:00–24:00 h. J.A.Rafael, D. \ Takiya & J.T.Câmara ”, DZRJ ; 2♂, 1♀, “ Brasil : AM [ Amazonas ], Coari , Rio \ Urucu Fogging, 04º52'23"S,\ 065º16'46"W, 81m \ 01.XI.2008, JAM Fernandes”, DZUP ; 1♂, “AM

[Amazonas], MANAUS\ RDS [Reserva de Desenvolvimento Sustentável] AMANÃ\ 14–17.IX.2023 \ LUZ F. ORLANDIN”, DZUP; 2♂, “BRASIL: Amazonas, Barcelos \ Rio Aracá , boca do R. [ Rio ] Curuduri \ 00.09734ºN 063.28952ºW \ Takiya, Cavichioli & Rafael et al. ”, “ 18–19.vi.2010 \ Luz Sub-bosque\ Hora: 3–5:30h”, DZRJ ; 1♂, same data as preceding, except: “Hora: 21h.”, INPA ; 1♂, “BRASIL: Amazonas, Barcelos \ Rio Padauari , Ararão / Ararinha \ 00.50487ºN 064.05831ºW \ Takiya, Cavichioli& Rafael et al. ”, “ 07–08.vi.2010 \ Luz Sub-bosque\ Hora: 03–06h”, INPA ; Rondônia 1♂, “ Flona [Floresta Nacional] do Jamari \ Preto 30.05.ix.\ 2012, luminosa”, “ G. Melo &\ RR Cavichioli”, DZUP . ECUADOR: 1♂, “ECUADOR: ORELLANA Province,\ Reserva Étnica Waorani, Transect \ Ent. , 1km S. Onkone Gare Camp,\ 220m 00 o 39'10"S 076 o 26'00"W ”, “ 21-Oct-1998, Erwin\ transect T/9 T. L. Erwin \ et. Al. Fogging terra firme\ forest, lot#1980”, MEPN .

Material examined: 1♂, “ PERU: Madre de Dios;\ Rio Tambopata Res ; 30 air\ km. SW Pto. Maldonado, 290m. \ 16–20 XI 1979 J.B. Heppner \ subtropical moist forest”, USNM .

Figures

FIGURE 3. Barolineocerus habitus. A, D, G, dorsal habitus. B, E, H, lateral habitus. C, F, I, face, ventral view. A–C, Barolineocerus chiasmus Freytag, 2008 specimen from French Guiana. D–F, Barolineocerus chicomendesi sp. nov. specimen from Brazil, Amazonas. G–I, Barolineocerus dercyae sp. nov. specimen from Brazil, Amazonas. Scale bars: A–B, D–E, G–H= 1.0 mm; C, F, I: 0.5 mm.

FIGURE 12. Barolineocerus dercyae sp. nov., male from Brazil, Amazonas, INPA. A, forewing. B, apodemes of sternite II, dorsal view. C, pygofer and anal tube, lateral view. D, pygofer and anal tube, posterior view. E, pygofer process apex in detail, posterior view. F, valve, ventral view. G, subgenital plate, lateral view. H, subgenital plate, ventral view. I, connective and style, dorsal view. J, connective, lateral view. K, style, lateral view. L, aedeagus, lateral view. M, aedeagus, posterior view. N, aedeagus apex in detail, posterior view. ADS: aedeagal dorsal median spine. Scale bars: A= 1.0 mm, B–M= 0.2 mm, N= 0.1 mm.