Neotropical Stomopogon (Diptera, Muscidae): new species, redescriptions and key to species
Fogaça, João M.
Gomes, Lucas R. P.
Couri, Márcia S.
Rodríguez-Fernandez, Jaime I.
De Carvalho, Claudio J. B.
Zootaxa
2021
2021-01-08
4903
3
301
330
7NWZ
Malloch, 1930
Malloch
1930
[151,486,1375,1401]
Insecta
Muscidae
Stomopogon
Animalia
Diptera
1
302
Arthropoda
genus
( 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. inculta1+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+5parallel 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, Hand 4B, E, H); surstylus long, longer than cercus in ventral view ( Figs 3B, E, Hand 4B, E, H); hypandrium tubular ( Figs 2A, 2C–F, 3C, F, I and 4C, F, I); distiphallus curved and membranous on apical half ( Figs 2E–F, 3C, F, I and 4C, F, I); epiphallus usually longer than postgonite ( Figs 3F, Iand 4F, I), except for S. albisetaand S. capribarba(3C and 4C, respectively) that are equal or subequal; postgonite comma-like ( Figs 3C, F, Iand 4C, F, I). Female: ovipositor long, with microtrichia ( Figs 5A–E), tergites 6 and 7 slender; cerci long and slender; epiproct three times longer than wide; three spermathecae pear-shaped.
Key to species of StomopogonMalloch 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.