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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. [45] [46]
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 ...
Although almost all evidence indicated that ammonites did not survive past the K–Pg boundary, there is some scattered evidence that some ammonites lived for a short period of time during the Paleocene epoch, although none survived the Danian (66-61 Ma); [1] they were likely extinct within 500,000 years of the K-Pg extinction event, which ...
For many millions of years the Proetida existed untroubled in their ecological niche. [23] An analogy would be today's crinoids, which mostly exist as deep-water species; in the Paleozoic era, vast 'forests' of crinoids lived in shallow near-shore environments. [23]
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 .
Ammonites — members of the Ammonoidea subclass of molluscan prehistoric cephalopods. Pages in this category should be moved to subcategories where applicable. This category may require frequent maintenance to avoid becoming too large.
Pages in category "Ammonite genera" The following 67 pages are in this category, out of 67 total. This list may not reflect recent changes. ...
Paleozoic ammonites: prehistoric marine molluscan cephalopods of the extinct Ammonoidea order. Subcategories. This category has the following 4 subcategories, out of ...