Thaumasiochaeta compressitarsis ( Stein, 1911 )

Couri, Márcia & Pont, Adrian, 2020, Type specimens of Limnophorini (Diptera: Muscidae) deposited in the Museum für Naturkunde, Humboldt-Universität zu Berlin (Berlin, Germany), Zoologia (e 46879) 37, pp. 1-57 : 46

Thaumasiochaeta compressitarsis ( Stein, 1911)

Figs 189–192

Paralectotypes. 1 male, 1 female. Lectotype in SMT, designated by Pont (2001: 467). Peru .

Diagnosis. Length of body. 4.5 mm (male, female). Head.

Male frons about one-third of head-width, brown. Fronto-orbital plate, parafacial, face and gena brown, silver pruinose close to antennal insertion from certain angles. Ocellar triangle indistinct. Ocellar setae very long.Antenna dark brown. Arista dark brown, bare. Palpus dark brown, long, enlarged and flat. Oral margin projecting forwards. Thorax. Scutum dark brown. Dorsocentrals 2+3. Katepisternals 1:1. Haltere brown. Calypters white. Legs. Brown. Fore tibia with 1 very long dorsal preapical seta. Fore tarsomere 1 with rather long anterodorsal and posterodorsal setae; tarsomere 2 with strong dorsal and ventral setae. Mid tibia with 3 strong posterior setae. Mid tarsomeres with many setae, longer on tarsomeres 4 and 5. Hind femur bowed on basal third; a series of fine setae with curled tips on basal fourth. Hind tibia with 1 median anterodorsal seta; without anteroventral and posterodorsal. Mid and hind tarsomeres a little flattened. Arolium and pulvillus not enlarged. Wing. Smoky brown. Costa with spines as far as apex of vein R 2+3. Abdomen. Dark brown. Remarks. The male can be recognized by the chaetotaxy of the fore and hind tarsomeres and the chaetotaxy and shape of the hind femur. It was keyed by Couri (1999) and by Couri and Carvalho (2002). Couri (1999, figs 40–48) revised the genus and gave illustrations of the morphologically distinctive characters and of the male and female terminalia.