New data on the taxonomy of Dolichopus lepidus Staeger, 1842 species group (Diptera: Dolichopodidae)

Abstract

The Dolichopodidae (Diptera) species of the Dolichopus lepidus Staeger, 1842 species group are revised. The lectotype of Dolichopus lepidus microstigma Stackelberg, 1930 is designated. This taxon is interpreted here as a separate species Dolichopus microstigma stat. n.; it is redescribed and figured. Three new species are described: Dolichopus nigricercus sp. n. from Sakhalin, Primorye, Magadan Region and Kamchatka (Russia), Dolichopus longicercus sp. n. from Kamchatka, Primorye, Irkutsk Region (Russia) and Kazakhstan, Dolichopus barkalovi sp. n. from Khabarovsk Region (Russia). Lectotype of D. microstigma and holotypes of all new species are deposited in Zoological Institute of the Russian Academy of Sciences (St Petersburg, Russia). A key (with diagnosis of new taxa) to lepidus species-group is added: 1. Face white or white with yellow shade ............................... 2 – Face brown .............................................................................. 3 2. Face white. Dorsal part of inner lobi of surstylus with tooth-shaped process, apical part shorter than basal part ........................................................ D. barkalovi sp. n. – Face with yellow shade. Dorsal part of inner lobi of surstylus oval, without tooth-shaped process, apical part longer than basal part .................... D. microstigma 3. Cercus elongate, 1.8 times as long as wide. Apical part of inner lobi of surstylus shorter than basal part ............. ............................................................ D. longicercus sp. n. – Cersus oval, with length barely larger than width. Apical part of inner lobi of surstylus longer than basal part ... 4 4. Cercus black. Stigma on wing absent of narrow. Inner lobi of surstylus oval dorsally, without emargination. Outer blade of surstylus without spine ventrally. Apicoventral blade of epandrium narrow, 2.5 times as long as wide. Hind tibiae not thickened ......................... ............................................................. D. nigricercus sp. n. – Cercus light, transparent, with black edging. Stigma on wing thick, oval. Inner lobi of surstylus with deep emargination dorsally. Outer lobi of surstylus with wide spine ventrally. Apicoventral lobi of epandrium wide, 1.5 times as long as wide. Hind tibiae thickened ... ............................................................................... D. lepidus

Keywords

• Diptera
• Dolichopodidae
• Dolichopus lepidus
• new species