Двоякодышащая рыба и черепахи из поздней юры северной ферганы (Киргизская ССР)

Abstract

A ceratodontid lungfish, Ferganoceratodus jurassicus gen. et sp. n. is described from Callovian (Upper Jurassic) of Sarykamyshsai, Osh district, Kirghiz SSR. Skull roof broad, consists of two unpared and three pared big bones; extrascapular bone short; dental plates bear 4 to 5 ridges. The fish allied to Arganodus and Asiatoceratodus. Shell of a tentatively plesiochelyid turtle «Plesiochelys» sp. and bones of an archaic toxochelyid turtle Toxocheloides narynensis sp. n. are described from the same locality. Epiplastron of the new turtle species bears long postero-lateral projection, xiphiplastron - antero-lateral one. Sulcus femoro-analis crosses the hind end of the hypoplastrals. The rich fossil assemblage includes also sharks, palaeoniscids, holosteans, dinosaurs, crocodilians etc.