Pteremis mongolicus (Papp, 1973)

Roháček, Jindřich, 2024, The genus Pteremis (Diptera: Sphaeroceridae) in the West Palaearctic area, with description of four new species, Acta Entomologica Musei Nationalis Pragae 64 (1), pp. 153-206 : 203

Pteremis mongolicus (Papp, 1973)

Leptocera (Pteremis) fenestralis spp. mongolica Papp, 1973a: 414 (female). Type locality: Mongolia, Bulgan aimak, between Somon Chischig-Öndör and Somon Orchon, 23 km NNE from Chischig- - Öndör [1,390 m]. Holotype: ♀ ( HNHM).

Pteremis mongolica : PAPP (1984):88 (generic combination,species status, Palaearctic catalog); RoHÁĆFK et al. (2001): 211 (world catalog).

Comments. Pteremis mongolicus was originally described as a subspecies of P. fenestralis based on 4 brachypterous females, and only subsequently elevated to species status by PAPP (1984). According to PAPP (1973a: 415) the only distinct differences from the brachypterous form of P. fenestralis (treated by PAPP 1973a, as L. (P.) fenestralis nivalis ) are the more abbreviated wings with incomplete R 2+3. However, this type of wing reduction with similarly modified R 2+3 vein (see Fig. 21 ) is also known in the brachypterous form of P. fenestralis described from Finland by FRFY (1947) as P. subapterus , see above. Consequently, P. mongolicus may only be a strongly brachypterous form of P. fenestralis identical to f. subapterus . Nevertheless, without study of the female postabdominal structures (S8 and spermathecae in particular) this suspicion cannot be demonstrated.

Distribution. Palaearctic: Mongolia.

Figures

Figs 16–21. Pteremis fenestralis (Fallén, 1820), wings. 16 – f. macropt., male; 17–21 – f. brach.; 17 – female with dm-cu preserved; 18 – female (f. nivalis); 19 – male (f. subapterus); 20 – female (f. nivalis); 21 – male (f. subapterus). Figs 16–20 are based on specimens from Rejvíz, peat-bog meadow (Czech Republic); Fig. 21 on specimen from Muonio (Finland). Scale = 0.5 mm. Photo by J. Roháček.