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Ammonites of prehistoric North America — a marine molluscs group of the prehistoric Cephalopods in North America. Subcategories This category has the following 5 subcategories, out of 5 total.
This list of ammonites is a comprehensive listing of genera that are included in the subclass †Ammonoidea, excluding purely vernacular terms. The list includes genera that are commonly accepted as valid, as well as those that may be invalid or doubtful ( nomina dubia ), or were not formally published ( nomina nuda ), as well as junior ...
Pages in category "Late Cretaceous ammonites of North America" The following 28 pages are in this category, out of 28 total. This list may not reflect recent changes .
Pages in category "Early Cretaceous ammonites of North America" The following 13 pages are in this category, out of 13 total. This list may not reflect recent changes .
Pages in category "Cretaceous ammonites of North America" The following 7 pages are in this category, out of 7 total. This list may not reflect recent changes .
Pages in category "Early Jurassic ammonites of North America" The following 6 pages are in this category, out of 6 total. This list may not reflect recent changes .
Ammonitida or "True ammonites" are an order of ammonoid cephalopods that lived from the Jurassic through Paleocene time periods, commonly with intricate ammonitic sutures. Ammonitida is divided into four suborders, the Phylloceratina , Lytoceratina , Ancyloceratina , and Ammonitina .
Jeletzkytes is an extinct genus of scaphatoid ammonite from the Upper Cretaceous (Maastrichtian) of North America named and described by Riccardi, 1983. In overall form Jeletzkytes closely resembles the genus Scaphites. A number of species have been described in the genus including: