''Danoceras'' is an essentially straight shelled

oncocerid The Oncocerida comprise a diverse group of generally small nautiloid cephalopods known from the Middle Ordovician to the Mississippian (early Carboniferous; one possible member is known from the Early Permian), in which the connecting rings are ...

named by Troedsson in 1926, and included in the

Diestoceratidae Diestoceratidae is a family in the nautiloid cephalopod order Oncocerida The Oncocerida comprise a diverse group of generally small nautiloid cephalopods known from the Middle Ordovician to the Mississippian (early Carboniferous; one possible ...

. It has been found in the upper, and possibly middle, Ordovician of Europe, (Estonia), Greenland, and Russia, (Taimyr Peninsula). Named species include ''Danoceras ravni'', type, ''D. inutile'', ''D. scandinavicum'', and ''D. skalbergensis''. The ''Danoceras'' shell is oval in section, laterally compressed with broadly rounded sides and narrowly rounded dorsum and venter. Chambers are short, septa close spaced, sutures straight and transverse. The siphuncle is subventral, close to but not touching the ventral margin. In form, cyrtochoanitic, necks recumbant. Related genera include '' Diestoceras'', '' Dowlingoceras'', '' Lychholmoceras'', and '' Suttonoceras''.

References

* Walter C Sweet, 1964. Nautiloidea - Oncocerida. Treatise on Invertebrate Paleontology. Geological Society of America and University of Kansas Press. {{Taxonbar, from=Q18350244 Oncocerida Prehistoric nautiloid genera Ordovician cephalopods Fossils of Greenland Middle Ordovician first appearances Late Ordovician extinctions Paleozoic life of Ontario Paleozoic life of Quebec