Agastrioceras SCHMIDT

Dernov, Vitaly, 2022, Late Bashkirian Ammonoids From The Mospyne Formation Of The Donets Basin, Ukraine, Fossil Imprint 78 (2), pp. 489-512 : 503-504

Genus Agastrioceras SCHMIDT in KUKUK, 1938

T y p e s p e c i e s. Glyphioceras carinatum FRECH, 1899 ; by original designation.

D i a g n o s i s. Genus of the family Gastrioceratidae with discoidal and pachyconic conch and moderately wide umbilicus. Venter is narrowly rounded. Ornamentation of inner whorls consists of small umbilical nodes; some species with very fine spiral ornamentation. Suture line with moderately wide, Y-shaped ventral lobe and moderately high median saddle; prongs of ventral lobe symmetric (after Patteisky 1965, Korn 1997).

S p e c i e s i n c l u d e d. A. adleri PATTEISKY, 1965 , Rhenish Mountains ( Germany); A. amaliae SCHMIDT in KUKUK, 1938, Rhenish Mountains ( Germany); A. carinatum ( FRECH, 1899) , Rhenish Mountains ( Germany); A. clathratum K ORN, 1997 , Praia das Quebradas ( Portugal); A. reifi ( KORN, 1997) , Praia das Quebradas ( Portugal); A. subcrenatum ( SCHLOTHEIM, 1822) , Rhenish Mountains ( Germany); A. supinum KORN, 1997 , Praia das Quebradas ( Portugal); A. vagum NIKOLAEVA, 1989 , Ugam Ridge ( Kazakhstan).

S t r a t i g r a p h i c r a n g e. Yeadonian – Langsettian / late early and early late Bashkirian.