''Macrodomoceras'' is a genus of
oncocerids, family
Polyelasmoceratidae
Polyelasmoceratidae is a family of oncocerid nautiloids characterized by rapidly expanding endogastrically curved shells, curved such that the ventral side is longitudinally concave. In cross section shells are typically tear-drop in shape to su ...
, from the Middle Devonian of Australia.
The shell of ''Macrodomoceras'' is a compressed, endogastric cyrtocone, i.e. section higher than wide and curved with the ventral side concave, with a subtriangular cross section. The siphuncle is ventral, marginal, with continuous actinosiphonate lamellae.
''Macrodomoceras'' resembles ''
Danaoceras
''Danaoceras'' is a nautiloid cephalopod from the middle Silurian of central Europe included in the oncoceroid family Polyelasmoceratidae. Similar specimens from the middle Devonian of North America may belong.
''Danaoceras'' has a laterally co ...
'' in its subtriangular cross section, but its sutures have bluntly pointed ventral saddles.
References
* Walter C. Sweet, 1964. Nautiloidea - Oncocerida; Treatise on Invertebrate Paleontology, Part K. Geological Society of America.
Prehistoric nautiloid genera
Oncocerida
{{paleo-nautiloidea-stub