Revision of fossil Bibionidae (Insecta: Diptera) from the Miocene of Radoboj, Croatia Author Skartveit, John Author Krizmanić, Katarina text Zootaxa 2020 2020-04-03 4759 3 351 378 journal article 10.11646/zootaxa.4759.3.3 9675f3d4-930d-4e4c-97e1-bcc7e6c5120d 1175-5326 3741178 FBD53C14-07AA-4E01-9739-214680A1DE4C Bibio incrassatus Heer, 1849: 221 . Described from a single specimen from “k.k. montan. Cabinet” Vienna. The specimen was depicted by Heer (Pl. XVI Fig. 12 ) but it is difficult to tell what it is. Heer’s figure may suggest the presence of a vein R 2+3 and a vertical crossvein R-M, in which case the species should be placed in the genus Plecia , possibly as a synonym of Plecia morio. On the other hand, if this interpretation of the wing venation is incorrect, it may habitually resemble Bibio giganteus . Pongracz (1928: 183) considered Bibio morio and Bibio incrassatus as probable synonyms.