Danaoceras

Danaoceras Temporal range: Middle Silurian
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Cephalopoda
Subclass:	Nautiloidea
Order:	†Oncocerida
Family:	†Polyelasmoceratidae
Genus:	†Danaoceras Foerste, 1926

Danaoceras is a nautiloid cephalopod from the middle Silurian of central Europe included in the oncocerid family Polyelasmoceratidae. Similar specimens from the middle Devonian of North America may belong.

Danaoceras has a laterally compressed shell curved such that the ventral or siphuncular side is longitudinally concave, i.e. is endogastric. The siphuncle, which is ventrally submarginal, contains laminar actinosiphonate deposits.

Danaoceras is the ancestral genus of the Polyelasmoceratidae and is possibly derived from either Oonoceras or Oocerina of the Oncoceratidae based on similarities of the siphuncle

References

• Walter C. Sweet, 1964. Nautiloidea - Oncocerida; Treatise on Invertebrate Paleontology, Part K. Geological Society of America.