Bisatoceras MILLER et OWEN 1937

Genus Bisatoceras MILLER et OWEN, 1937 T y p e s p e c i e s. Bisatoceras primum MILLER et OWEN, 1937; by original designation. D i a g n o s i s. Genus of the family Bisatoceratidae with subdiscoidal conch and very narrow or closed umbilicus. Ornamentation of transverse growth lamellae which form ventral and lateral sinuses and ventrolateral and dorsolateral salients. Constrictions present in early ontogenetic stages, but absent at maturity. Prongs of the ventral lobe are accuminate and inflatted and are broader than the first lateral saddle. The secondary ventral saddle is nearly as high as the rounded lateral saddle and is narrow and accuminate and the umbilical lobe is shallow and rounded (after Nassichuk 1975). S p e c i e s i n c l u d e d. B. akiyoshiense NISHIDA, 1971, Akiyoshi (Japan); B. baraiense SOBOLOEV in SOBOLEV et al., 1998, Verkhoyansk Ridge (Siberia, Russia); B. elegantulum RUAN, 1981, Guangxi (China); B. greenei MILLER et OWEN, 1939, Missouri (USA); B. hoeni NASSICHUK, 1975, Canadian Arctic Archipelago (Canada); B. huashibanense YANG, 1978, Guizhou (China); B. kotti NASSICHUK, 1975, Canadian Arctic Archipelago (Canada); B. micromphalus MCCALEB, 1968, Arkansas (USA); B. nevadense GORDON, 1969, Nevada (USA); B. primum MILLER et OWEN, 1937, Oklahoma (USA); B. qixuense RUAN, 1981, Guangxi (China); B. renni NASSICHUK, 1975, Canadian Arctic Archipelago (Canada); B. solominae POPOW, 1970, Kolyma Ridge (Siberia, Russia); B. vidnayense POPOV et KUSINA, 1993, Novaya Zemlya (Russia); B. vulgare RUAN, 1981, Guangxi (China). S t r a t i g r a p h i c r a n g e. Late Serpukhovian to Gzhelian.Published as part of Dernov, Vitaly, 2022, Late Bashkirian Ammonoids From The Mospyne Formation Of The Donets Basin, Ukraine, pp. 489-512 in Fossil Imprint 78 (2) on page 504, DOI: 10.37520/fi.2022.021, http://zenodo.org/record/752260