[Morphology of the blackfly species group macropyga of the genus Prosimulium roubaud, 1906, and re-establishment of the generic name Taeniopterna Enderlein, 1925 for this group (Diptera: Simuliidae)].

The genus Taeniopterna with the types species Melusina macropyga Lundstrom, 1911 was proposed by Enderlein in 1925. Later this taxon was considered as the species group macropyga in the genus Prosimulium Roubaud, 1906 by many authors (Rubzov, 1956; Crosskey et Howard, 1997; Adler et al., 2004, and others). However, differences between this group and the remaining species of Prosimulium s. str. (species group hirtipes/mixtum) seem to be not lesser, than those between other genera (or subgenera) of the tribe Prosimuliini (in our sense), namely Helodon Enderlein, 1921, Urosimulium Contini, 1963, Parahelodon Peterson, 1970, and Distosimulium Peterson, 1970. Taeniopterna differs from other genera of Prosimuliini by the following characters. Imago differs from all other genera in having shortened proboscic (1.5 times shorter than clypeus, while in other genera it is of the same length with clypeus). It differs from all genera except Helodon in having relatively prolonged and lightly pointed distally wings (in other genera wings are wide and rounded distally). Male differs from all other genera of the tribe, except Urosimulium, in having narrow frons between the eyes. It differs from the Urosimulium male by conic gonostyles (in Urosimulium gonostyles bear the large heel). Female differs from all other genera of tribe by very small spermatheca (1/3-1/5 of the lenght of the branch of genital fork (while in other genera spermatheca is equal or longer, than the branch of genital fork) and by the absence of serration on maxillae and mandibles. Female also differs from other genera of the tribe, except Prosimulium, by very long hypogynal valves and by missing or very small and pressed basal tooth of claws (in Helodon, Urosimulium, Parahelodon, and Distosimulium hypogynal valves are short and rounded, basal tooth of claws is moderate or large and put aside). It differs from Prosimulium by smaller head (more narrow than thorax, while in Prosimulium head is near equal by width with thorax) and by absence of sclerotization on the medial edges of hypogynal valves. Larva differs from all other genera of the tribe, except Prosimulium, in having long dorsoventral projections of wide sclerotized band of prothorax (in other genera this band is narrow and without projections). It differs from Prosimulium by another pattern of the hypostomal teeth. Pupa differs from all other genera of the tribe, except Distosimulium, by cocoon covering all the pupal body (in other genera cocoon covers only posterior part of the pupal body). It differs from Distosimulium by long and strong caudal thorns (in Distosimulium caudal thorns are of moderate length and more thin). These and some other characters give the base for the proposition to consider the species group macropyga as a a separate genus Taeniopterna Enderlein, 1925. A list of Taeniopterna species is given.