Thaumasiochaeta pilitarsis 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 : 48

Thaumasiochaeta pilitarsis Stein, 1911

Figs 205–208

Paralectotypes. 2 males, 2 females. Lectotype in SMT, designated by Pont (2001: 480). Peru and Bolivia .

Diagnosis. Length of body. 6.0 mm (male, female). Head. Male frons about one-third of head-width. Frons, fronto-orbital plate, parafacial, face and gena brown. Ocellar triangle indistinct. Ocellar setae very long. Antenna dark brown. Arista dark brown, bare, its tip enlarged into a triangle. Palpus dark brown, long and flat.Oral margin projecting forwards.Thorax.Scutum dark brown. Dorsocentrals 2+3. Katepisternals 1:1. Haltere brown. Calypters white, margin of lower one dark brown. Legs. Brown. Male fore tibia with 1 very long dorsal preapical seta. Fore tarsomere 1 with rather long anterodorsal and posterodorsal setae; ventral surface with 1 basal and 1 apical seta and many short brownish-red spine-like setae between them; tarsomere 2 with 3 strong ventral setae. Mid tibia with 3 anterodorsals, 3 posterodorsals and 2–3 anteroventrals, all on middle third. Mid tarsomere 2 with many anterodorsal and posterodorsal setae. Hind coxa with rows of strong black setae curved at tips. Hind tibia with with many long and fine setae on anterodorsal and posterodorsal surfaces. Arolium and pulvillus not enlarged. Wing. Smoky brown. Costal spines present as far as tip of vein R

2+3

. Abdomen. Dark brown.

Remarks. The species can be recognized by the arista, with its tip enlarged into a triangle; margin of lower calypter dark brown; chaetotaxy of fore tarsomeres 1 and 2; and hind coxa with rows of strong black setae that are curved at tips. It was keyed by Couri (1999) and by Couri and Carvalho (2002). The morphological features and the male and female terminalia were illustrated by Couri (1999, figs 1–13).