Discosorida

From Palaeos.org

Jump to: navigation, search
(Derivation: linked Upper Cambrian to Cambrian)
(linked nautiloid and cephalopod)
Line 1: Line 1:
-
The Discosorida is an  order of nautiloid cephalopods from the early Paleozoic characterized by their rather unique siphuncle in which the connecting rings are zoned along their length and hook into the previous septal foramina as well as being expanded into the chambers. Discosorids produced shells that were generally breviconic or cyrtoconic. Cyrtoconic shells were typically compressed and were either endogastric with the venter longitudinally concave or exogastric with the venter longtiuinally convex.
+
The Discosorida is an  order of [[Nautiloidea|nautiloid]] [[Cephalopoda|cephalopods]] from the early Paleozoic characterized by their rather unique siphuncle in which the connecting rings are zoned along their length and hook into the previous septal foramina as well as being expanded into the chambers. Discosorids produced shells that were generally breviconic or cyrtoconic. Cyrtoconic shells were typically compressed and were either endogastric with the venter longitudinally concave or exogastric with the venter longtiuinally convex.
==Diagnosis==
==Diagnosis==

Revision as of 16:03, 29 November 2013

Personal tools