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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 ...
Many ammonite species were filter feeders, so they might have been particularly susceptible to marine faunal turnovers and climatic change. [30] Some reports suggest that a few ammonite species may have persisted into the very early Danian stage of the Paleocene, before going extinct. [46] [47]
The geological history of North America comprises the history of ... The oldest known eukaryotes lived around 1.4 billion ... Examples include ammonites ...
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. A.
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. A.
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 .
An iridescent ammonite from Madagascar Map of North America highlighting the shallow inland sea present during the mid-Cretaceous period. Ammolite comes from the fossil shells of the Upper Cretaceous disk-shaped ammonites Placenticeras meeki and Placenticeras intercalare, and (to a lesser degree) the cylindrical baculite, Baculites compressus.