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Ammonites are prehistoric marine mollusks that belong to the class Cephalopoda, which also includes modern squids, octopuses, and nautiluses. They are specifically part of the subclass Ammonoidea, characterized by their coiled and chambered shells. Ammonites thrived during the Mesozoic Era and became extinct around 66 million years ago during the Cretaceous-Paleogene extinction event. Their fossilized shells are important for dating and correlating the age of sedimentary rock layers.
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What is a pachyceratid?
A pachyceratid is a member of the Pachyceratidae, a family of ammonites from the middle- and upper-Jurassic period.
Do ammonites live in today's seas?
ammonites are extinct
What is a xenacanthid?
A xenacanthid is a member of the Xenacanthidae family of animals, a family of prehistoric sharks.
What are ammonites named for?
Ammonites are named for the Egyptian god Ammon, who had a ram's head. The shells of ammonites are spirals like the horns of a ram.
What were predators of ammonites?
Various aquatic reptiles were predators of ammonites. Fossils of damaged ammonites have been found with teeth marks from Plesiosaurs.
What is the branch of science most closely related to the study of prehistoric cultures?
The study of prehistoric cultures to the first development of agriculture, about 10,000 years ago, is called paleoanthropology.
Which states had prehistoric animals?
All states had prehistoric animals. The question is which states had which ones. For example, California and Florida were underwater during most of the Age of Reptiles, so they had no dinosaurs, but they still had marine creatures (although little is known of Florida's prehistoric life). In California, we do know that Shonisaurus, a 49 foot long icthyosaur, lived here, along with ammonites and many other aquatic animals.
Who are the ammonites?
Squid
What eon was ammonites introduced?
Ammonites first appeared during the Devonian Period within the Paleozoic Era.
What period in which the last ammonites became extinct?
Ammonites went extinct at the end of the Cretaceous Period.
What does each branch on a tree represent?
In genealogy, a branch on a family tree can represents a nuclear family or a person.
When did ammonites become extinct?
Ammonites went extinct at the same time as the dinosaurs, about sixty-five million years ago.
