Spilogona tendipes (Malloch, 1920)

Spilogona tendipes (Malloch, 1920) View in CoL

Figs 7 A–H View FIGURE 7

Notes. In Sorokina & Michelsen (2014) Spilogona tendipes was recorded for the first time from Wrangel Island and from NE Greenland from Zackenberg, all based on females. However, a few doubts were expressed about the assignment of these females to Spilogona tendipes : (1) the type locality lies in the warmer maritime climatic zone on the south coast of Alaska; (2) Huckett (1932, 1965) emphasized the presence of abundant setulae on the declivities of the scutellum in the male holotype, but these declivities are practically bare in these females.

Later, male and female specimens similar to Spilogona tendipes from Wrangel Island were found in Gorodkov’s collections in the ZISP, and additional material of the same species has been collected on Wrangel Island. Further material similar to Spilogona tendipes from the Magadan region and Altai Mts of Russia was also collected recently. The good condition of these flies and the presence of males made it possible to study more carefully all the characters of the collected specimens.

Specimens from the Magadan region and Altai Mts agreed fully with the description of Spilogona tendipes ; these localities are not further north than the type locality of Spilogona tendipes . Specimens from Wrangel Island are very similar to Spilogona tendipes , but there are not only some morphological differences between these species, including the genitalia, but they are also genetically distinct. The specimens from Wrangel Island, including the females listed in Sorokina & Michelsen (2014), thus proved to be a species new for science, Spilogona latizygoma sp. nov., described above.

Spilogona tendipes and Spilogona latizygoma sp. nov. can be separated as in following couple:

- Mid tibia without v setae; hind femur with distinct long pv in basal half; all femora with numerous hair-like av setae in basal half; scutum with long ground-setulae; sternites 3–5 with long setae ( Fig. 3A View FIGURE 3 ); eye with inconspicuous hairs; male terminalia as in Fig. 3G, H View FIGURE 3 ; female hypoproct with weak individual spinules ( Fig. 3F View FIGURE 3 )...................... S. latizygoma sp. nov.

- Mid tibia with a short v seta; hind femur without distinct long pv in basal half; all femora without numerous hair-like av setae in basal half; scutum with short ground-setulae; sternites 3–5 with short setae ( Fig. 7B View FIGURE 7 ); eye with distinct hairs; male terminalia as in Fig. 7F, G View FIGURE 7 ; female hypoproct with numerous spinules ( Fig. 7E View FIGURE 7 )..................................... S. tendipes

Material examined. RUSSIA, Magadan region: 1♂ 2♀, Yablonevyi Pass, 120 km NNE Magadan, 900 m ,

60°59’N 151°53 Е, 17.vii.2014, leg. N. Vikhrev (1♀ ( BUIC-DIP1759 ) in SZMN, 1♀ 1♂ in ZMUM); 1♀ 1♂, Yablonevyi Pass , 120 km NNE Magadan, 783 м , 60°35’N 151°32 Е, yellow pan trap, 11.vii.2017, leg. V. Sorokina ( BUIC-DIP1758 , SZMN). Altai Republic : 1♂, Kosh-Agach district, Akbul River , on stones near the water, 2075 m , 49º39’N 88º1’Е, 12.vii.2009, leg. V. Sorokina ( SZMN). CANADA, Yukon: 1♀, Richardson Mts , 67º58’N 136º29’W, 1–5.vii.1987, leg. M. Polak & M. Wood ( SZMN) GoogleMaps .

Distribution. PALAEARCTIC:? Greenland (NE), Russia (Magadan region, Altay). NEARCTIC: Alaska, Yukon.

DNA barcode. BOLD BIN: BOLD:ADZ7217. See Table 1 for GenBank accession numbers.

Remarks. Spilogona tendipes is morphologically very similar to Spilogona latizygoma . But based on DNA barcodes, these species are genetically different; the p-distance between them is 3.36%.