Romaniceras

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Romaniceras
Temporal range: Late Cretaceous, Late Cenomanian - Late Turonian [1]
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: Ammonoidea
Order: Ammonitida
Family: Acanthoceratidae
Subfamily: Euomphaloceratinae
Genus: Romaniceras
Spath, 1923

Romaniceras is a genus of Upper Cretaceous ammonites in the Acanthoceratidae subfamily Euomphaloceratinae. [1]

The shell is rather evolute, whorl section circular to oval and Romaniceras differs from Acanthoceras in having 9 or 11 rows of tubercles, of which the ventrolateral may be clavate (i.e. elongate). The ribs of Romaniceras specimens are strong and fairly close spaced. [1] [2]


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References

  1. 1 2 3 W.J. Arkell et al., 1957. Mesozoic Ammonoidea; Treatise on Invertebrate Paleontology, Part L, Mollusca 4. Geological Society of America and University of Kansas Press.
  2. Spath, 1923