Prionoceratidae Hyatt 1884
- Dataset
- The ammonoids from the Gattendorfia Limestone of Gattendorf (Devonian-Carboniferous boundary; Upper Franconia, Germany)
- Rank
- FAMILY
Classification
- kingdom
- Animalia
- phylum
- Mollusca
- class
- Cephalopoda
- order
- Goniatitida
- family
- Prionoceratidae
diagnosis
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.
discussion
Included subfamilies Prionoceratinae Hyatt, 1884; Imitoceratinae Ruzhencev, 1950; Karagandoceratinae Librovitch, 1957; Voehringeritinae Bartzsch & Weyer, 1988; Acutimitoceratinae Korn, 1994; Balviinae Korn in Korn & Klug, 2002.