Thricops aduncus Savage, 2003

Vikhrev, Nikita E. & Sorokina, Vera S., 2017, Taxonomic notes and faunistic data on the Muscidae (Diptera) of the Altai Mountains (Russia), Zootaxa 4311 (2), pp. 241-254 : 242-243

Thricops aduncus Savage, 2003

Fig. 1 G

Material examined. RUSSIA: Altai Republic: 2♂ 2♀, Seminskiy Pass , 51.05°N 85.59°E, 1650 m asl, 27– 30.06.2016, leg. N. Vikhrev ; 1♂, Seminskiy Pass, Turala River valley , 50.99°N 85.68°E, 1350 m asl, 8– 13.07.2016, leg. N. Vikhrev ( ZMUM).

Remarks. Thricops aduncus Savage, 2003 was decribed from a male holotype and several female paratypes from NW Canada (Yukon, Alberta, British Columbia) and Alaska. All the Altai specimens were collected on forest edges from Umbelliferae inflorescences together with the much more common (about 20:1) Thricops longipes (Zetterstedt, 1845) . The male of Thricops aduncus is unmistakable due to its modified hind leg. Females from the Altai runs to Thricops aduncus in Savage’s key ( Savage 2003) and fits the description which, however, does not mention the dilated palpi. We re-examined female paratypes of Thricops aduncus in the CNC and found that the female palpi are distinctly broader than in male. This uncommon character among the Thricops species makes identification of the female of Thricops aduncus easier and more reliable.

Distribution. New record for Palaearctic: Russia (Altai Mts). Nearctic: Canada (Yukon Territory, British Columbia, Alberta), USA (Alaska).

Figures

FIGURE 1. A. Xestomyia atrox (female). B. Phaonia fusca (female, lectotype of suspiciosa Stein). C, D, F. Hydrotaea hsiai: C. Female. D. Male. F. Male mid tarsomere 1. E. Hydrotaea tuberculata, male mid tarsomere 1. G. Thricops aduncus, male hind tibia.