Ammonites are a tale of two textures. The prehistoric cephalopods were composed of fleshy soft tissue (the living bit of the animals) and hard external shells, which, according to a paper published ...

Jack Wonfor (pictured) is among the fossil hunters on the Isle of Wight who found a 211-pound fossilized seashell. It’s a 115-million-year-old ammonite, best described as a “squid-like cephalopod ...

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Ammonites are a group of fossil marine mollusk animals closely related to living cephalopods (i.e., octopuses, squid, and cuttlefish) and shelled nautiloids such as the living Nautilus species. The ...

Some extinct species left copious fossil remnants of their existence. Ammonites—an extinct type of cephalopod—are one such example. From the Devonian right up until the Paleocene, wherever ancient ...

These extinct shelled cephalopods ruled the ocean for 300 million years. But how they swam and shaped the seas remains a mystery. "Snake stones" or ancient sea creature? Credit: opacity/flickr/CC ...