Romaniceras

Romaniceras; Temporal range: Late Cretaceous, Late Cenomanian - Late Turonian PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
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]

References

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.
↑ Spath, 1923

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[Arkell1957-1] 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

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References