Ammonites are a group of extinct cephalopod mollusks with ribbed spiral shells. They are exceptionally diverse and well known to fossil lovers. Researchers have developed the first biomechanical model ...

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 ...

Torticonic (helically-coiled) ammonoids have been most commonly interpreted as vagile, benthonic forms. Their mode of coiling, however, places the siphuncle in a functionally dorsolateral, rather than ...

Journal of Paleontology, Vol. 66, No. 5 (Sep., 1992), pp. 801-816 (16 pages) Specimens of the ammonite genus Balatonites from the Middle Triassic of Austria and Hungary are analyzed morphometrically ...

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 ...

Scientists devised a mathematic model that helps explains how Nipponites, some of the wonkiest ammonites, built their shells. By Sabrina Imbler If you’ve seen one ammonite, you may think you’ve seen ...

The bizarre fossil is one of very few records of soft tissue in a creature better known as a whorled shell. By Sabrina Imbler If anxious humans have nightmares of being naked in public, an anxious ...

Ninety-nine million years ago in what's now Myanmar, a glob of tree resin oozed onto a beach. Today, the resulting fossilized lump of amber is giving scientists an astonishing glimpse into life on a ...

Ammonites – the ancient relatives of squid and octopuses – left behind some of the most common and beautiful fossils. But look closely at their elegant, spiral shells and you might be able to spot a ...

WHO ate whom in the food chains of the past is rarely clear. Though it is obvious which species were predators and which prey, the subtle specialisations of feeding habit that allow many types of ...