Clymeniida

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Clymeniida

 

an order of extinct cephalopod mollusks of the superorder Ammonites; lived in the late Devonian. Clymeniida were distinguished by the position of the siphon in the shell: it was adjacent to the dorsal side, while in most Ammonites it was adjacent to the ventral side. The shell of the Clymeniida varied from 1 to 50 cm in length. There were approximately 30 genera. The Clymeniida are important fossils for research.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.