Prionoceratidae 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 : 17-18

Family Prionoceratidae Hyatt, 1884

[nom. correct. Bogoslovsky (1971: 180), pro Prionocerae Hyatt, 1884]

Diagnosis

Family of the superfamily Prionoceratoidea with the sutural formula E A L U I or (E 1 E m E 1) A L U I in some advanced forms; adventive lobe deep, V-shaped or lanceolate and pointed, only rarely blunt; the lateral lobe has a position on the umbilical seam. Conch in the juvenile stage usually subinvolute, in some lineages subevolute or evolute; adult stage usually involute, but subinvolute in some genera. Shell ornament with fine to coarse growth lines, mostly without ribs.

Included subfamilies

Prionoceratinae Hyatt, 1884 ; Imitoceratinae Ruzhencev, 1950 ; Karagandoceratinae Librovitch, 1957 ; Voehringeritinae Bartzsch & Weyer, 1988 ; Acutimitoceratinae Korn, 1994 ; Balviinae Korn in Korn & Klug, 2002.