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Elrodoceras
''Elrodoceras'' is an armenoceratid, (Cephalopoda, Actinocerida), that grew fairly large, characterized by a straight shell, slightly curved at the apex, a siphuncle narrower than that of ''Armenoceras'' but with segments still wider than long, and an arched endosiphuncular canal system. ''Elrodoceras'', which comes from the Middle Silurian of North America and Europe, is a late armenoceratid and, according to Curt Teichert, 1964, a member of one of the two branches of the Armenoceratidae that also includes ''Armenoceras'' and ''Monocyrtoceras''. ==References==
* Curt Teichert, 1964. Actinoceratoidea, Treatise on Invertebrate Paleontology, Part K. Geological Society of America and University of Kansas press.
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