coleoids
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coleoids |
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| navigate by keyword : ammonite ammonoid ammonoidea ancient animal animals antique archeology background biology brown cephalopod cephalopoda coil coiled coleoids collect collection creature creatures cretaceous curve dactylioceras dead death deep devonian die dinosaur dying evolution extinct extinction find fish fishes fossil fossilised fossilized geological geology historic history jurassic life live living lower marine mollusc mollusk natural nature nautiloids nautilus ocean old paleo paleogene paleontology period prehistoric prehistorical prehistory rib ribbed sea seashell shape shell snail species spiral squid stone texture triassic upper water |
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| Ammonites are an extinct group of marine mollusc animals in the subclass Ammonoidea of the class Cephalopoda. These molluscs are more closely related to living coleoids (i.e., octopuses, squid, and cuttlefish) than they are to shelled nautiloids such as the living Nautilus species. The earliest ammonites appear during the Devonian, and the last species died out during the Cretaceousââ¬âPaleogene extinction event. This excellent fossil example is shown against a white background. |
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Stockphotos.ro (c) 2024. All stock photos are provided by Dreamstime and are copyrighted by their respective owners. |
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