Spilogona spinicosta ( Stein, 1907 )

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 : 41

Spilogona spinicosta ( Stein, 1907)

Paralectotypes. 2 males, 2 females. Lectotype in ZIN, designated by Pont (2001: 469). China .

Diagnosis. Length of body. 3.0 mm (male, female). Head. Male dichoptic. Frons, fronto-orbital plate, ocellar triangle, face, parafacial and gena brown. Lower orbital seta directed backwards and outwards. Ocellar triangle reaching halfway to lunule. Ocellar setae long. Eye without hairs. Antenna dark brown. Arista dark brown, short pubescent. Palpus dark brown. Gena at lowest eye margin about the same width as postpedicel. Oral margin not projecting forwards. Thorax. Scutum brown. Acrostichals in 2 rows. Dorsocentrals 2+3. Notopleuron without setulae. Anepisternum without interspatial seta. Haltere brown. Calypters white, almost subequal. Legs. Brown. Fore tibia without a posterior seta. Mid tibia with 2 posterior setae on middle third; 1 anterodorsal; without anteroventral. Hind tibia with 1 anterodorsal seta; 1–2 anteroventrals; without posterodorsal. Arolium and pulvillus not enlarged. Wing. Costal margin from humeral cross vein to end of subcostal vein with a series of spines. Abdomen. Sternite 1 bare.

Remarks. A very distinct species of Spilogona , very small, with the lower orbital seta directed backwards and outwards in male and a row of short spines along costal margin, from humeral cross vein to the end of subcostal vein. The species can be identified with the key by Hennig (1959) who illustrated the male terminalia (Hennig 1959, plate 13 fig. 268, plate 17 fig. 347).