''Magdoceras'' is a genus of Late/Upper Silurian
tarphycerid
The Tarphycerida were the first of the coiled cephalopods, found in marine sediments from the Lower Ordovician (middle and upper Canad) to the Middle Devonian. Some, such as ''Aphetoceras'' and ''Estonioceras'', are loosely coiled and gyroconic ...
s, a kind of nautiloid cephalopod with a coiled shell.
References
''Magdoceras''Fossilworks entry.
* Jack Sepkoski 200
List of cephalopod genera
Prehistoric nautiloid genera
Silurian cephalopods
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