Discosoridae

From Palaeos.org

Jump to: navigation, search
(started article)
(added systematcs at top)
 
Line 1: Line 1:
 +
:Systematic Paleontology <br/>
 +
:Class: [[Cephalopoda]] <br/>
 +
:Subclass: [[Nautiloidea]] <br/>
 +
:Order: [[Discosorida]] <br/>
 +
:Family: Discosoridae
 +
'''Discosoridae''' is a family of derived [[Discosorida|discosorids]] (nautiloid cephalopods), with generally breviconic, endogastric shells, that range from the Middle [[Silurian]] to Upper [[Devonian]]. Siphuncles are rapidly expanding, with broadly rounded segments composed of recumbent necks with wide brims and generally thin connecting rings and bullettes that are never swollen. Endocones are found in the siphuncle which usually have a narrow endosiphutube running down the middle in which may contain diaphragms.  
'''Discosoridae''' is a family of derived [[Discosorida|discosorids]] (nautiloid cephalopods), with generally breviconic, endogastric shells, that range from the Middle [[Silurian]] to Upper [[Devonian]]. Siphuncles are rapidly expanding, with broadly rounded segments composed of recumbent necks with wide brims and generally thin connecting rings and bullettes that are never swollen. Endocones are found in the siphuncle which usually have a narrow endosiphutube running down the middle in which may contain diaphragms.  
Siphuncles are common but whole or partial shells are more rare.  
Siphuncles are common but whole or partial shells are more rare.  

Latest revision as of 18:42, 8 October 2014

Personal tools