Ammonitida

From Palaeos.org

Jump to: navigation, search
m (Study and application: separated refernces)
(Taxonomy: changed wording)
Line 9: Line 9:
==Taxonomy==
==Taxonomy==
-
Primary subdivisions are superfamilies, the: <br>
+
Primary subdivisions are superfamilies. They are the: <br>
:[[Acanthocerataceae]] <br>
:[[Acanthocerataceae]] <br>
:[[Desmocerataceae ]] <br>
:[[Desmocerataceae ]] <br>
Line 23: Line 23:
:[[Stephanocerataceae]]  
:[[Stephanocerataceae]]  
-
Cretaceous superfamilies are the Acanthocerataceae, Desmocerataceae, Haplocerataceae, Hoplitaceae, Perisphinctaceae and Pulchelliaceae, with Haplocerataceae and Perisphinctaceae also found in the Jurassic. Those that are exclusively Jurassic are , in temporal sequence, the Psylocerataceae, Eocerocerataceae, Hilderataceae, Hammatocerataceae, and Stephanocerataceae.  
+
The Acanthocerataceae, Desmocerataceae, Haplocerataceae, Hoplitaceae, Perisphinctaceae and Pulchelliaceae are known only from the Cretaceous while the Haplocerataceae and Perisphinctaceae are found in Jurassic formations as well.   The Psylocerataceae, Eocerocerataceae, Hilderataceae, Hammatocerataceae, and Stephanocerataceae are, in temporal sequence, limited to the Jurassic.
-
 
+
==Phylogeny ==  
==Phylogeny ==  

Revision as of 13:47, 10 March 2013

Personal tools