Podonomius Kalugina, 1985

Lukashevich, Elena D. & Przhiboro, Andrey A., 2011, New Chironomidae (Diptera) with elongate proboscises from the Late Jurassic of Mongolia, ZooKeys 130, pp. 307-322 : 310

Genus Podonomius Kalugina, 1985

Podonomius Kalugina and Kovalev 1985: 101. Type species Podonomius tugnuicus Kalugina and Kovalev 1985: 102.

Notes.

The genus was described for six species fromthe Early and Middle Jurassic of Siberia, with only two species being attributed with certainty. Later, one more species from the Early Jurassic of Germany was tentatively included ( Ansorge 1996). The specimens under description are assigned to this genus due to their broadhead, large reniform eyes with dorsomedial projection, short thorax (no longer than its height), narrow scutellum, short postnotum, three rounded sclerotized spermathecae, and peculiarities of venation (vein C long, reaching R4+5 tip; Sc not terminating in wing margin; R2+3 absent; R1 long, not thickened distally in female; R4+5 straight or only slightly curved down distally; bR4+5 and m-cu inclined to long wing axis; r-m, bM3+4 and m-cu aligned; r-m much longer than bM3+4; cell ba and bp not symmetrical; m-cu connecting Cu proximal to r-m; costal and radial veins, stem M and CuA, r-m, bM3+4 and m-cu thickened, other veins very thin and pale; wings without spots).

We re-examined the type material of the six species described by Kalugina (1985) from Siberia (Fig. 2i) but did not examine? Podonomius tumidus Ansorge, 1996 from Grimmen. A postnotum without longitudinal median groove was recorded in the original diagnosis of Podonomius (for German species, such information was absent; Ansorge 1996). This feature is known only in Aphroteniinae and Podonominae and unknown in Tanypodinae and Buchonomyiinae ( Brundin 1966, Murray and Fittkau 1989, Sæther 1989). Unfortunately it is impossible to see this important character in the new specimens, in particular, due to the lateral position of impressions. Pubescence and setae of their bodies are also not visible on any specimens described here.