taxonID	type	description	language	source
03C387F6ED38FE49FE5B25D3FDF6D8ED.taxon	description	(Figs. 1, 2, 6, 7, 11, 12, 16, 17, 21)	en	Griswold, Terry (2025): New Neotropical cleptoparasites in the genus Austrostelis (Hymenoptera: Megachilidae: Anthidiini). Journal of Melittology 2025 (126): 1-11, DOI: 10.17161/jom.vi126.22851, URL: https://doi.org/10.17161/jom.vi126.22851
03C387F6ED38FE49FE5B25D3FDF6D8ED.taxon	diagnosis	DIAGNOSIS: This species differs from other northern species by the more angulate axillae (Figs. 11, 12), short labrum, T 2 with coarser punctation and broader impunctate margin (Figs. 16, 17), and absence of submedial, longitudinal stripes on the scutum (Figs. 11, 12). From the potentially co-occurring A. flava (Friese) it differs in tergal punctation finer and impunctate tergal margins narrower.	en	Griswold, Terry (2025): New Neotropical cleptoparasites in the genus Austrostelis (Hymenoptera: Megachilidae: Anthidiini). Journal of Melittology 2025 (126): 1-11, DOI: 10.17161/jom.vi126.22851, URL: https://doi.org/10.17161/jom.vi126.22851
03C387F6ED38FE49FE5B25D3FDF6D8ED.taxon	description	DESCRIPTION: Female. Body length, 5.6 mm; intertegular distance, 1.58 mm. Body with black marks limited to head and mesosoma, metasoma dorsally orange with yellow markings (Fig. 1). Forewing smoky apically including marginal cell, stigma and veins surrounding marginal cell dark brown (Fig. 1). Labrum short, not reaching full length of fossa, mouthparts in repose exposed apically. Mandible 4 - toothed, third tooth weak, obtuse, gap dorsal to it deeper than one ventral to it. Clypeus with moderate, nearly contiguous punctures. Subantennal suture convex (Fig. 6). Juxtantennal carinae with even flare. Flagellum dark except F 1, F 2 yellow; penultimate segment slightly longer than broad. Pronotal collar lacking narrow groove laterally. Scutum polished; punctation dense, not contiguous; punctures regular (Fig. 11). Scutellum with apical margin very broadly, evenly convex, carinate except medially; laterally, at margin with axilla, exceeding the axillar length. Axilla angulate laterally (Fig. 11). Mesepisternum with punctation dense, punctures medially no larger than those on scutum laterally. Metapleuron with puncture row along anterior margin, disc without punctures on ventral half, posterior margin distinctly angulate near middle. Forewing unicolored, venation dark; marginal cell darkly cloudy in contrast to surrounding areas (Fig. 1). T 2 with lateral margin in dorsal view slightly convex; punctation of subapical band slightly smaller than on disc, not fine; apical impunctate margin moderately wide (Fig. 16). T 3 – T 6 with rather dense, subappressed white pubescence. T 6 with small preapical pit medially, with very fine indistinct transverse preapical striae. Male. Body length, 5.3 mm; intertegular distance, 1.52 mm. As female except: Mandible apically reduced, 3 - toothed. Labrum with apical margin truncate, not angled medially. Additional flagellomere. T 2 shape as in female but punctation medially less dense, less coarsely punctate, only slightly finer than on disc (Fig. 17). T 7 apical margin slightly convex with hint of emargination medially. S 2 short, disc flat, apical zone translucent, concolorous (Fig. 21). S 3 apical margin slightly incurved on middle two-thirds, laterally slightly angled anteriorly, fringe on margin dense, straight medially becoming long laterally, curled toward midline. S 4, S 5 with similarly configured fringes but shorter. S 5, S 6 with small apicolateral slightly acute angle	en	Griswold, Terry (2025): New Neotropical cleptoparasites in the genus Austrostelis (Hymenoptera: Megachilidae: Anthidiini). Journal of Melittology 2025 (126): 1-11, DOI: 10.17161/jom.vi126.22851, URL: https://doi.org/10.17161/jom.vi126.22851
03C387F6ED38FE49FE5B25D3FDF6D8ED.taxon	materials_examined	TYPE MATERIAL: Holotype female: “ Venezuela Merida Los Araques 13 km W Lagunillas 18 - VII- 1991 L. Stange & C. Porter ” (HOLO 103). Paratypes: same data, 1 female, 7 males. Holotype deposited in FSDA, paratypes in FSDA and BBSL.	en	Griswold, Terry (2025): New Neotropical cleptoparasites in the genus Austrostelis (Hymenoptera: Megachilidae: Anthidiini). Journal of Melittology 2025 (126): 1-11, DOI: 10.17161/jom.vi126.22851, URL: https://doi.org/10.17161/jom.vi126.22851
03C387F6ED38FE49FE5B25D3FDF6D8ED.taxon	discussion	COMMENTS: This is the first record of Austrostelis from Venezuela. It runs to couplet 5, A. flava, in Parizotto et al. (2018) but differs as indicated in the diagnosis. It is worth noting that both species from northern South America, this species and A. flava from Colombia, have a pale metasoma unlike the largely dark metasomal coloration in all known species from more southerly parts of South America. A single male from the type locality has the basal zone of T 2 black. This specimen is also larger than the other specimens and may not be conspecific, so is not included here. The markings, body size and shape of A. bicolor are virtually identical with Hypanthidium magdalenae Urban of adjacent northern Colombia.	en	Griswold, Terry (2025): New Neotropical cleptoparasites in the genus Austrostelis (Hymenoptera: Megachilidae: Anthidiini). Journal of Melittology 2025 (126): 1-11, DOI: 10.17161/jom.vi126.22851, URL: https://doi.org/10.17161/jom.vi126.22851
03C387F6ED3FFE4DFEB820F1FC6AD875.taxon	description	(Figs. 5, 10, 15, 20)	en	Griswold, Terry (2025): New Neotropical cleptoparasites in the genus Austrostelis (Hymenoptera: Megachilidae: Anthidiini). Journal of Melittology 2025 (126): 1-11, DOI: 10.17161/jom.vi126.22851, URL: https://doi.org/10.17161/jom.vi126.22851
03C387F6ED3FFE4DFEB820F1FC6AD875.taxon	diagnosis	DIAGNOSIS: Unique among known Austrostelis in the bicolored wings with yellow veins and dark tips and the entirely yellow and reddish metasoma (Fig. 5). Presumably this would apply to males since markings do not differ significantly between sexes in Austrostelis. Additionally, it differs from A. mexicana and A. bicolor in F 10 white, F 9 no longer than broad instead of longer than broad and subantennal suture nearly straight (Fig. 10). Figures 16 – 20. Austrostelis metasoma T 1 and T 2. 16. A. bicolor female holotype. 17. A. bicolor male paratype (BBSLID 116102). 18. A. mexicana female holotype. 19. A. mexicana male paratype (BBSLID 116107). 20. A. costaricensis female holotype. Scale bar = 0.25 mm.	en	Griswold, Terry (2025): New Neotropical cleptoparasites in the genus Austrostelis (Hymenoptera: Megachilidae: Anthidiini). Journal of Melittology 2025 (126): 1-11, DOI: 10.17161/jom.vi126.22851, URL: https://doi.org/10.17161/jom.vi126.22851
03C387F6ED3FFE4DFEB820F1FC6AD875.taxon	description	DESCRIPTION: Female. Body length, 5.6 mm; intertegular distance, 1.50 mm. Body with black marks limited to head and mesosoma, metasoma dorsally largely orange with yellow markings (Figs. 5, 10, 15). Forewing bicolored, smoky apically, yellow in marginal cell, stigma yellow, veins surrounding marginal cell light (Fig. 5). Labrum long, extending full length of fossa, completely covering mouthparts in repose. Mandible 4 - toothed, third tooth weak, obtuse, gap dorsal to it no deeper than one ventral to it. Clypeus with moderate, nearly contiguous punctures. Subantennal suture nearly straight (Fig. 10). Juxtantennal carinae with convex flare dorsally. Flagellum black except dark red on F 1, white on F 10 (Fig. 5) and sometimes F 9; penultimate segment no longer than broad. Pronotal collar extending medially as narrow groove nearly to the level of the parapsidal suture. Scutum polished; punctation dense but not contiguous, punctures regular (Fig. 15). Scutellum with apical margin very broadly, evenly convex, carinate except medially; laterally, at margin with axilla, exceeding the axillar length. Axilla broadly rounded laterally, not angulate (Fig. 15). Mesepisternum with punctation dense, punctures medially larger than those on scutum laterally. Metapleuron with puncture row along anterior margin, disc without punctures on ventral half, posterior margin distinctly angulate near middle. T 2 with lateral margin in dorsal view strongly convex; punctation of subapical band slightly smaller than on disc, not fine; apical impunctate margin narrow (Fig. 20). T 3 – T 6 with rather dense, suberect golden pubescence. T 6 with small preapical pit medially, without transverse preapical striae. Male: unknown.	en	Griswold, Terry (2025): New Neotropical cleptoparasites in the genus Austrostelis (Hymenoptera: Megachilidae: Anthidiini). Journal of Melittology 2025 (126): 1-11, DOI: 10.17161/jom.vi126.22851, URL: https://doi.org/10.17161/jom.vi126.22851
03C387F6ED3FFE4DFEB820F1FC6AD875.taxon	etymology	ETYMOLOGY: Name recognizes the country of origin of this species.	en	Griswold, Terry (2025): New Neotropical cleptoparasites in the genus Austrostelis (Hymenoptera: Megachilidae: Anthidiini). Journal of Melittology 2025 (126): 1-11, DOI: 10.17161/jom.vi126.22851, URL: https://doi.org/10.17161/jom.vi126.22851
03C387F6ED3FFE4DFEB820F1FC6AD875.taxon	distribution	DISTRIBUTION: Costa Rica.	en	Griswold, Terry (2025): New Neotropical cleptoparasites in the genus Austrostelis (Hymenoptera: Megachilidae: Anthidiini). Journal of Melittology 2025 (126): 1-11, DOI: 10.17161/jom.vi126.22851, URL: https://doi.org/10.17161/jom.vi126.22851
03C387F6ED3FFE4DFEB820F1FC6AD875.taxon	materials_examined	TYPE MATERIAL: Holotype female: “ COSTA RICA, San José Ciudad Colón, 800 m VI-VII 1990 col. Luis Fournier ”. Paratype female: “ COSTA RICA Guanacaste Maritza Biol. Sta. Volcan Orosi, 12 - II- 1995 F. D. Parker ” (HOLO 102). Holotype deposited in Museo de Zoologia, Universidad de Costa Rica (MZUCR); paratype in BBSL.	en	Griswold, Terry (2025): New Neotropical cleptoparasites in the genus Austrostelis (Hymenoptera: Megachilidae: Anthidiini). Journal of Melittology 2025 (126): 1-11, DOI: 10.17161/jom.vi126.22851, URL: https://doi.org/10.17161/jom.vi126.22851
03C387F6ED3FFE4DFEB820F1FC6AD875.taxon	discussion	COMMENTS: Austrostelis costaricensis runs to couplet 3 in Parizotto et al. (2018), where it agrees with A. appendiculata, known only from Brazil, in the entirely yellow mandible but the mesepisternum lacks the black discal spot. The markings and body size of A. costaricensis make it almost impossible to distinguish visually from the co-occurring Hypanthidioides (Saranthidium) panamensis (Cockerell).	en	Griswold, Terry (2025): New Neotropical cleptoparasites in the genus Austrostelis (Hymenoptera: Megachilidae: Anthidiini). Journal of Melittology 2025 (126): 1-11, DOI: 10.17161/jom.vi126.22851, URL: https://doi.org/10.17161/jom.vi126.22851
03C387F6ED3DFE42FE4D20BBFB69D8F9.taxon	description	(Figs. 3, 4, 8, 9, 13, 14, 18, 19, 22)	en	Griswold, Terry (2025): New Neotropical cleptoparasites in the genus Austrostelis (Hymenoptera: Megachilidae: Anthidiini). Journal of Melittology 2025 (126): 1-11, DOI: 10.17161/jom.vi126.22851, URL: https://doi.org/10.17161/jom.vi126.22851
03C387F6ED3DFE42FE4D20BBFB69D8F9.taxon	diagnosis	DIAGNOSIS: The combination of rounded axillae (Figs. 13, 14); black basal and apical bands on the terga (Figs. 18, 19); and frons, vertex, and scutum (Figs. 13, 14) with punctation confluent, is distinctive. In addition, the female mandible is largely black (Fig. 8).	en	Griswold, Terry (2025): New Neotropical cleptoparasites in the genus Austrostelis (Hymenoptera: Megachilidae: Anthidiini). Journal of Melittology 2025 (126): 1-11, DOI: 10.17161/jom.vi126.22851, URL: https://doi.org/10.17161/jom.vi126.22851
03C387F6ED3DFE42FE4D20BBFB69D8F9.taxon	description	DESCRIPTION: Female. Body length, 7.1 mm; intertegular distance, 1.70 mm. Body black with yellow markings on head, mesosoma, and extensively on metasoma dorsally (Figs. 3, 8, 13). Forewing smoky apically, yellowish smoky in marginal cell, stigma dark amber, veins surrounding marginal cell dark. Labrum long, extending full length of fossa, completely covering mouthparts in repose. Mandible 4 - toothed, third tooth weak, strongly obtuse, gap dorsal to it no deeper than one ventral to it. Clypeus with coarse, contiguous punctures. Subantennal suture weakly convex. Juxtantennal carina with convex flare dorsally. Flagellum black except yellow on F 1, brown on distal half of F 10; penultimate segment longer than broad. Pronotal collar extending medially as narrow groove nearly to the level of the parapsidal suture. Scutum with surface shiny but not polished; punctation contiguous, punctures irregular. Scutellum with apical margin very broadly, evenly convex, carinate except medially; laterally, at margin with axilla, exceeding the axillar length. Axilla slightly rounded laterally, not angulate (Fig. 13). Mesepisternum with punctation dense, punctures medially no larger than those on scutum laterally. Metapleuron with row of punctures along anterior margin, disc without punctures on ventral half; posterior margin distinctly angulate near middle. Forewing unicolored, venation dark; marginal cell darkly cloudy in contrast to surrounding areas (Fig. 3). T 2 with lateral margin in dorsal view only slightly convex; subapical band finely, densely punctate, much finer than on disc, apical impunctate margin narrow (Fig. 18). T 3 – T 6 with rather dense, suberect golden pubescence. T 6 with small preapical pit medially, without transverse preapical striae. Male. Body length, 7.1 mm; intertegular distance, 1.82 mm. As female except: Mandible apically reduced, 3 - toothed, mostly yellow (Fig. 9). Labrum with apical margin angled medially. Additional flagellomere. T 2 shape as in female but punctation of subapical zone more coarsely punctate, only slightly finer than on disc (Fig. 19). T 7 apical margin slightly convex with hint of emargination medially. S 2 short, disc raised into rounded transverse ridge, apical zone translucent, not pigmented (Fig. 22). S 3 apical margin distinctly incurved on middle two-thirds, laterally distinctly angled anteriorly, fringe on margin dense, straight medially becoming long laterally, curled toward midline. S 4, S 5 with similarly configured but shorter fringes. S 5, S 6 with small apicolateral acute angle.	en	Griswold, Terry (2025): New Neotropical cleptoparasites in the genus Austrostelis (Hymenoptera: Megachilidae: Anthidiini). Journal of Melittology 2025 (126): 1-11, DOI: 10.17161/jom.vi126.22851, URL: https://doi.org/10.17161/jom.vi126.22851
03C387F6ED3DFE42FE4D20BBFB69D8F9.taxon	etymology	ETYMOLOGY: Name recognizes the country of origin of this species.	en	Griswold, Terry (2025): New Neotropical cleptoparasites in the genus Austrostelis (Hymenoptera: Megachilidae: Anthidiini). Journal of Melittology 2025 (126): 1-11, DOI: 10.17161/jom.vi126.22851, URL: https://doi.org/10.17161/jom.vi126.22851
03C387F6ED3DFE42FE4D20BBFB69D8F9.taxon	distribution	DISTRIBUTION: Central to southern Mexico.	en	Griswold, Terry (2025): New Neotropical cleptoparasites in the genus Austrostelis (Hymenoptera: Megachilidae: Anthidiini). Journal of Melittology 2025 (126): 1-11, DOI: 10.17161/jom.vi126.22851, URL: https://doi.org/10.17161/jom.vi126.22851
03C387F6ED3DFE42FE4D20BBFB69D8F9.taxon	materials_examined	TYPE MATERIAL: Holotype female: “ Mex [ico]. Chis. Acacovaqua. 15 ° 15.37 N. 032 ° 23 26 W 2005 / VII / 11 M. Rincón, R. Ayala, R. Vandame, M. Guzman ” (HOLO 101). Paratype males: MEXICO: 1 male, San Luis Potosi Tlamaya (nr. Xilitla) 900 m alt., 24 Aug. 1988, D. Yanega on Hyptis; 1 male, Veracruz, Loma Ventura, El Mirador, 1170 m, 24 - 09 - 06, 19 1234.3 N 96 54 08.3 W En Bidens pilosa, M. Bonet, 0000006158. Holotype deposited in ECOSUR; paratypes in SEMC and CNIN.	en	Griswold, Terry (2025): New Neotropical cleptoparasites in the genus Austrostelis (Hymenoptera: Megachilidae: Anthidiini). Journal of Melittology 2025 (126): 1-11, DOI: 10.17161/jom.vi126.22851, URL: https://doi.org/10.17161/jom.vi126.22851
03C387F6ED3DFE42FE4D20BBFB69D8F9.taxon	discussion	COMMENTS: The female runs to couplet 5 in Parizotto et al. (2018), where it fails both sets of characters: scape and F 1 are reddish but scutellum is largely yellow as are T 3 – T 6. In the key to males (Parizotto et al., 2018), the male runs to A. flava in couplet 5. The inclusion of images of the holotype of A. flava in Parizotto et al. (2018) suggests that A. mexicana differs in narrower impunctate tergal margins and T 2 with basal third black.	en	Griswold, Terry (2025): New Neotropical cleptoparasites in the genus Austrostelis (Hymenoptera: Megachilidae: Anthidiini). Journal of Melittology 2025 (126): 1-11, DOI: 10.17161/jom.vi126.22851, URL: https://doi.org/10.17161/jom.vi126.22851
