Stomopogon Malloch 1930
Creators: name: Fogaça, João M.
name: Gomes, Lucas R. P.
name: Couri, Márcia S.
name: Rodríguez-Fernandez, Jaime I.
name: De Carvalho, Claudio J. B.
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Muscidae
Stomopogon

description: Stomopogon Malloch, 1930
(Figs 1–27)
Type-species: Coenosia albiseta Stein (orig. desc.).
Diagnosis. Ground-color black, silver dust on head; thorax and abdomen grey. Frons broad in both sexes (Figs 13B, 14B). Epistoma not protruding (Figs 1C, D). One pair of upper orbital setae directed backwards (Fig. 1B). Inner and outer vertical setae longer than ocellar seta; ocellar seta shorter or similar to postocellar seta. Fronto-orbital plate narrow and bare, except for S. capribarba (Fig. 14B) and S. inculta (Fig. 20B). Postpedicel with pointed apex, not reaching epistoma (Fig. 1D). Arista short pubescent (Fig. 1C), long pubescent (Fig. 16B) or bare. Palpus slender. Prosternum bare. Dorsocentral setae 1+3; intra-alar setae 1+2, except for S. inculta 1+1; supra-alar setae 1+1; 1 postalar seta; 2 basal postpronotal setae; 2 notopleural setae; prealar seta absent. Lateral margin of scutellum bare; basal scutellar seta subequal in length to the apical scutellar seta, except for S. garleppi. Lower proepisternal seta directed downward; 2 proepisternal setae; anepisternum with 4–6 setae; katepisternal setae 1+1+1 forming an equilateral triangle. Halter yellowish, except for S. nigrisquama sp. nov. Vein R 4+5 parallel apically (Fig.1G); vein r-m almost straight. Calypteres developed, upper calypter glossiform and lower elongated, about twice as long as the upper one (Fig. 1E). Sternite 1 bare. Tergites 3 to 5 with developed lateral marginal seta; tergite 5 with developed discal seta. Male: cercus rectangular (Figs 3B, E, H and 4B, E, H); surstylus long, longer than cercus in ventral view
(Figs 3B, E, H and 4B, E, H); hypandrium tubular (Figs 2A, 2 C–F, 3C, F, I and 4C, F, I); distiphallus curved and membranous on apical half (Figs 2 E–F, 3C, F, I and 4C, F, I); epiphallus usually longer than postgonite (Figs 3F, I and 4F, I), except for S. albiseta and S. capribarba (3C and 4C, respectively) that are equal or subequal; postgonite comma-like (Figs 3C, F, I and 4C, F, I). Female: ovipositor long, with microtrichia (Figs 5 A–E), tergites 6 and 7 slender; cerci long and slender; epiproct three times longer than wide; three spermathecae pear-shaped.
Key to species of Stomopogon Malloch
1 Antenna with arista long pubescent (Fig. 16B). Apical scutellar seta smaller than basal scutellar setae (Fig. 16C). Abdomen with the two first visible segments translucent yellow (Fig. 16A, C).............................. S. garleppi (Stein, 1911)
- Antenna with arista short pubescent or bare. Apical and basal scutellar setae subequal in length. Two first visible abdomen segments not translucent.................................................................................. 2
2(1) Scutum with two large brown vittae (Figs 14C, 15C)......................................................... 3
- Scutum without vittae, if present, three thin vittae (Figs 25C, 26C).............................................. 4
3(2) Male mid and hind femora black except for the knees and trochanters (Fig. 18A). Male hind tibia a little setulose (Fig. 18A). Female fore tibia yellow............................................................ S. hirtitibia (Stein, 1911)
- Male mid and hind femora yellow (Fig. 14A). Male hind tibia with many long setae (Fig. 14A). Female fore tibia grey................................................................................... S. capribarba (Stein, 1911)
4 (2) Fronto-orbital plate with many setulae (Fig. 20B). Parafacial wider or subequal than pedicel (Fig. 20A)................................................................................................... S. inculta (Stein, 1911)
- Fronto-orbital plate bare (Fig. 12B). Parafacial narrower than pedicel (Fig. 12A)................................... 5
5(4) Legs all brown (Fig. 25E).............................................................................. 6
- Legs with yellow parts (Fig. 12A)........................................................................ 7
6(5) Halter knob yellow. Calypteres whitish (Fig. 25A)......................................... S. paranaensis sp. nov.
- Halter knob dark brown. Calypteres brownish (Fig 23A).................................... S. nigrisquama sp. nov.
7(5) Postpedicel yellow (Fig. 9B). Body with many white setae (Fig. 9A)........................... S. albiseta Stein, 1911
- Postpedicel brown (Fig. 12B). Body setae black (Fig. 12A).................................................... 8
8(7) Gena not developed, shorter than pedicel length (Fig. 10A). Frontal triangle almost reaching the lunule. Female scutum with 3 strong brown vittae running along dorsocentral and acrostichal lines (Fig. 10C).............. S. argentina (Snyder, 1957)
- Gena well developed, larger than pedicel (Fig. 12A). Frontal triangle short. Female scutum with 3 faint brown vittae running along dorsocentral and acrostichal lines (Fig. 12C)......................................... S. boliviensis sp. nov.
description: Published as part of Fogaça, João M., Gomes, Lucas R. P., Couri, Márcia S., Rodríguez-Fernandez, Jaime I. & De Carvalho, Claudio J. B., 2021, Neotropical Stomopogon (Diptera, Muscidae): new species, redescriptions and key to species, pp. 301-330 in Zootaxa 4903 (3) on pages 302-304, DOI: 10.11646/zootaxa.4903.3.1, http://zenodo.org/record/4427746