Cassinoceras

Taxobox
name = "Cassinoceras"
fossil_range = Early Ordovician
regnum = Animalia
phylum = Mollusca
classis = Cephalopoda
subclassis = Nautiloidea
ordo = Endocerida
familia = Piloceratidae
genus = "Cassinoceras"

Cassinoceras ("Cassin Horn") is an Early Ordovician Endocerid nautiloid. They are characterised by a very short broad shells. The siphuncle is very large and filled with endocones.

"Cassinoceras grande" Ulrich & Foerste is known from Cassin Limestone of Vermont. It has a shell about 25 to 30 cm long.

References

*Moore, Raymond C., Lalicker, Cecil G., & Fischer, Alfred G. 1952. "Invertebrate Fossils". McGraw-Hill, New York. Page 355