File:Orthoceras cochleatus.jpg

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English: Fossil of Armenoceras (formerly Orthoceras) cochleatus SCHLOTHEIM, an extinct orthocone nautiloid cephalopod from the early Paleozoic, on display at the Museo di Paleontologia di Firenze. The preserved body part is a fragment of the fossilized siphuncle, i.e. a part of an internal structure of the nautiloid shell. The constrictions represent the passages of the siphuncle through the chamber walls (septae) of the shell.
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Author Ghedoghedo

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current15:17, 5 August 2012Thumbnail for version as of 15:17, 5 August 20121,173 × 740 (181 KB)Ghedoghedo (talk | contribs)

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