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Megadisocosorus : ウィキペディア英語版
Megadisocosorus

''Megadisocosorus'' is an actinocerid cephalopod similar to ''Armenoceras'' but with a short, slightly curved, breviconic shell. The siphuncle is in contact with the ventral wall, unlike that of ''Armenoceras'' in which the siphuncle is close to the center.
''Megadisocosorus'' is known from the Middle Silurian of North America. According to Teichert, 1964, ''Megadisocosorus'' is a member of one of the two branches of the Armenoceratidae that also includes ''Nybyoceras'' and ''Selkirkoceras''.
==References==

* Curt Teichert, 1964. Actinoceratoidea, Treatise on Invertebrate Paleontology, Part K. Geological Society of America and University of Kansas Press.


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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