Chironomidae

Lukashevich, Elena Dmitrievna & Ansorge, Jörg, 2024, First Upper Triassic Diptera (Insecta) from Germany, Zootaxa 5403 (1), pp. 115-129 : 121-122

Family Chironomidae incertae sedis

( Fig. 5 )

Material. SNHMB-G.5997 , part and counterpart of an incomplete wing, without anterior part .

Locality and horizon. Fuchsberg near Seinstedt, Lower Saxony, Germany; ’Fossilführende Wechselfolge’ alternating fine grained sand, silt and clay, Shipingia gerbachmanni conchostracan zone; latest Sevatian (uppermost Norian); Upper Triassic.

Description. Isolated small wing 2.75 mm long, not less than 1 mm wide, Sc visible in proximal wing half without apical portion; arculus present; radius with three branches, R 1, R 2+3 and R 4+5; R 2+3 well separated from R 1 and R 4+5, only proximal portion preserved; R 4+5 slightly curved; Rs stem short, basal portion of R 4+5 1.5 times and crossvein r-m 3 times as long as Rs stem; media with two branches, M 1+2 and M 3+4, basal portion of M 3+4 (MCu of authors) long; Rs stem, bas R 4+5, r-m and bas M 3+4 aligned, forming “cord”; CuP visible at least up to level of m-cu; anal lobe distinct; setae on veins invisible.

Remark. Due to the incompletely preserved wing the subfamilial affinity is uncertain (see Discussion).

Figures

FIGURE 5. Wing of Chironomidae inc. sed., SNHMB-G.5997, Fuchsberg, Tr3. Line drawing and photo, total view. Scale bar = 1 mm.