Lycoriella taimyrensis, Menzel & Vilkamaa, 2021

Menzel, Frank & Vilkamaa, Pekka, 2021, New species and records of Lycoriella Frey (Diptera, Sciaridae) from the Holarctic region, Zootaxa 5072 (6), pp. 501-530 : 519

Lycoriella taimyrensis sp. n.

Figs 10A , 11A , 13E

Material studied. Holotype male. RUSSIA, Krasnoyarsk region, Taimyr Nature Reserve, Aru-Mas , 72.50°N, 101.94°E, pan trap, 9–20.VII.2010, A. Barkalov (in ISEA) . Paratypes. RUSSIA, Krasnoyarsk region, Taimyr Peninsula, on River Zakharova Rassokha , 72.70°N, 101.08°E, pan trap, 1–10. VII .2011, A. Barkalov, 3 males (2 in MZH, http://id.luomus.fi/GE.1793 and http://id.luomus.fi/GE.1794; 1 in SDEI) .

Description. Male. Head. Face and antenna concolorous brown, maxillary palpus pale brown. Eye bridge 2 facets wide, medially narrowed and without facets. Face with 16 setae. Clypeus with 2 setae. Maxillary palpus with 3 segments, 1 st segment as long as 3 rd segment, 2 nd segment shortest; 1 st segment with 6 setae, with large dorsal pit with setae; surface of antennal flagellomeres smooth, body of 4 th antennal flagellomere 1.45–1.55x as long as wide, neck shorter than wide, longest setae shorter than width of flagellomere. Thorax. Brown; setae pale. Anterior pronotum with 5 setae. Proepisternum with 5 setae. Scutellum with 2 long and some short and fine setae. Wing. Fumose. Length 1.4–1.5 mm. Width/length 0.45. Anal lobe small. Veins distinct, except for stM. c/w 0.65–0.70. R1/R 0.60–0.70. stM slightly longer than fork of M. bM and r-m subequal in length, stCuA shortest. bM and r-m non-setose. Halter yellow. Legs. Yellow. Fore tibial organ forming moderate indistinct patch of sensilla in poorly demarcated depression. Fore tibial spur slightly shorter than apical width of tibia. Abdomen. Pale brown; setae pale and short. Hypopygium ( Fig. 10A ). Brown, like abdomen. Intergonocoxal area moderately long, with wide setose lobe. Gonocoxa wide, longer than gonostylus, with sparse, rather long and fine setosity. Gonostylus ( Fig. 11A ) widest basally, strongly narrowed towards apex, slightly impressed medially; densely setose apically, with strong apical tooth, with 4–5 short hyaline megasetae medially and dorsally very near apical tooth, 8–9 long and narrow megasetae on high basal bodies in a dense group more basally near whip-lash seta. Tegmen ( Fig. 13E ) wider than long, smoothly curved apically, weakly sclerotized, with small teeth apicolaterally; straight laterally, with strongly sclerotized apodemes, with small area of minute aedeagal teeth. Aedeagal apodeme short and strong.

BIN. Unknown.

Discussion. Unlike any other known Lycoriella species , Lycoriella taimyrensis sp. n. and L. tundrae sp. n. have some short but strong and well-sclerotized teeth-like structures laterally on their tegmen, the former in an apicolateral position ( Fig.13E ), the latter in a basolateral position ( Fig. 13F ). Lycoriella taimyrensis has its tegmen relatively broader, with straighter lateral sides and with stronger apodemes, its gonostylus and gonocoxa wider, its gonostylus with more megasetae, including apical ones (lacking in L. tundrae ) and the setae of its intergonocoxal lobe weaker and more numerous. See also under Lycoriella eurystylata sp. n. and L. jakovlevi sp. n.

Etymology. The species is named after the area where the collection localities are situated, the Taimyr Peninsula in northern Siberia.

Figures

FIGURE 10. Hypopygium, ventral. A. Lycoriella taimyrensis sp. n. (holotype) B. L. tundrae sp. n. (holotype). Scale 0.1 mm.

FIGURE 11. Gonostylus, ventral. A. Lycoriella taimyrensis sp. n. (holotype) B. L. tundrae sp. n. (holotype). Scale 0.1 mm.

FIGURE 13. Tegmen, ventral. A. Lycoriella eurystylata sp. n. (holotype). B. L. acutostylia Mohrig & Menzel, 1990 (from Finland, Sadinvaara). C. Lycoriella jakovlevi sp. n. (paratype). D. L. kinbasketi sp. n. (holotype). E. L. taimyrensis sp. n. (holotype). F. L. tundrae sp. n. (holotype). Scale 0.1 mm.