Biology:Vascoceratidae

Vascoceratidae is a family of Upper Cretaceous ammonites in the superfamily Acanthoceratoidea characterized by shells that are either smooth or bluntly tuberculate, or have sparse, coarse ribs. Sutural elements are shallow, irregular, and slightly indented, or deep and very indented. Whorl section and degree of involution vary, even within species.

Vascoceratidae is a short lived family restricted to the early and middle Turonian stage. Its duration, no more than a few million years. They are derived from the Acanthoceratidae and are the predecessors of the Tissotiidae, which in turn gave rise to the Coilopoceratidae; all taking place in a short time span in the Turonian.

There are 11 genera assigned to this family:

• Ezilloella Reyment, 1954
• Pervinquière, 1907 Péron, 1897
• Furon, 1935 Pseudoneoptychites
• Infabricaticeras Leanza, 1967
• Gombeoceras Cobban, Hook & Kennedy, 1989
• Cobban, Hook & Kennedy, 1989 Vascoceras
• Microdiphasoceras Choffat, 1898
• Fagesia Reyment, 1954
• Cobban, Hook & Kennedy, 1989 Nannovascoceras
• Hemitissotia Renz & Alvarez, 1979
• Rubroceras Paramammites

References

Wikidata ☰ Q7916431 entry