Prionoceratoidea Hyatt, 1884

Korn, Dieter & Weyer, Dieter, 2023, The ammonoids from the Gattendorfia Limestone of Oberrödinghausen (Early Carboniferous; Rhenish Mountains, Germany), European Journal of Taxonomy 882, pp. 1-230 : 17

Superfamily Prionoceratoidea Hyatt, 1884

[nom. transl. Bogoslovsky (1971: 94), pro Prionocerae Hyatt, 1884; nom. correct. Kullmann (2009: 2), pro Prionocerataceae]

Diagnosis

Superfamily of the suborder Tornoceratina with discoidal to globular, primarily involute conchs without coarse ornament. Many modifications of the conch shape during ontogeny and phylogeny; advanced forms may possess a wide umbilicus and may bear a coarse ornament. Basic suture line with the elements E A L I, development of supplementary external, adventive, lateral and umbilical lobes occur in various lineages. Ornament primarily with growth lines only; ribs are developed in some lineages. Growth lines have a convex course in the early forms, but there are trends toward biconvex growth lines in many lineages (after Korn & Klug 2002).

Included families

Prionoceratidae Hyatt, 1884 ; Cheiloceratidae Frech, 1897 ; Sporadoceratidae Miller & Furnish, 1957 ; Praeglyphioceratidae Ruzhencev, 1957 ; Maximitidae Ruzhencev, 1960 ; Gattendorfiidae Bartzsch & Weyer, 1987 .