Mordellidae

Liu, Ming, Lu, Wenhua & Ren, Dong, 2007, A new fossil mordellid (Coleoptera: Tenebrionoidea: Mordellidae) from the Yixian Formation of Western Liaoning Province, China, Zootaxa 1415, pp. 49-56 : 50-51

Key to the subfamilies of Mordellidae (modified from Franciscolo 1957)

1. Antennae of male flabellate from the 5th segment; segments 5-10 bearing at their inner side a single, very long flabellum; segment 11 as long as segments 5-10 taken together, in form of flabellum. Antennae of

females with segments 6–10 much prolonged at their inner side, but without true flabella. Galea in both sexes extremely thin, longer than one half of head. ..................... subfamily Ctenidiinae Franciscolo, 1951 Antennae of both sexes filiform, moniliform or dentate, but never bearing flabellum-like appendages at their inner side. Galea in both sexes much shorter than one half of head. ................................................. 2 2. Last tergum elongated to form a pygidium, hind coxae greatly enlarged to a round or square plate, hind femora developed strongly, and hind tibiae with subapical ridges in addition to apical ridges .................... .............................................................................................................subfamily Mordellinae Fowler, 1912 Last tergum without elongation, hind coxae only enlarged to a small but transversely elliptical plate, hind femora slightly larger than fore and middle ones, and hind tibiae without any other ridges except apical ones...................................................................... subfamily Praemordellinae Scegoleva-Barovskaja, 1929