ammonoid

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English - Turkish

Definition of ammonoid in English Turkish dictionary

ammonite
ammonit
ammonite
bir kafadanbacaklı kabuğunun fosili
ammonite
fosil
English - English
Characteristic of an ammonite
Any of a group of extinct shelled cephalopods, related to the modern pearly nautilus, that are commonly found as fossils in marine rocks of the Devonian through Cretaceous periods (410-65 million years ago). Most ammonoids were predators. The shells, either straight or coiled, served as protective and supportive structures and enabled the animals to compensate for varying water depths. Ammonoids are important index fossils because of their wide geographic distribution in shallow marine waters, rapid evolution, and easily recognizable features. See also belemnoid
ammonite
{i} extinct cephalopod mollusk
ammonoids
plural of ammonoid
ammonoid
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