Ammonites are the spiral-shelled things that lived in the ocean. They are usually drawn with tentacles coming out of the shells. The closest relation to the ammonite family now is the Coleoidea family (squid, cuttlefish, and octopus). They also look like the modern-day Nautilus.
Ammonites are an extinct group of marine invertibrates animals in the subclass Ammonoidea of the class cephalopoda These molluscs are more closely related to living coleoids (i.e. octopuses,squids, and cuttlefish) than they are to shelled nautiloids such as the living nautilus species.
Ammonites are excellent index fossils , and it is often possible to link the rock layer in which they are found to specific geological time periods Their fossil shells usually take the form of planispirals, although there were some helically-spiraled and non-spiraled forms (known as heteromorphs).
The name ammonite, from which the scientific term is derived, was inspired by the spiral shape of their fossilized shells, which somewhat resemble tightly-coiled rams ' horns. Pliny the Elder (d. 79 AD. near Pompeii) called fossils of these animals ammonis cornua ("horns of Ammon") because the Egyptian god Ammon (Amun) was typically depicted wearing ram's horns. Often the name of an ammonite genus ends in -ceras, which is Greek (κέρας) for "horn".
in the Mesozoic and Paleozoic era
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.
ammonites are extinct
Various aquatic reptiles were predators of ammonites. Fossils of damaged ammonites have been found with teeth marks from Plesiosaurs.
If not specified as trace fossil of Ammonites, it should be a body fossil. Ammonites is the name of the creature.
Squid
An ammolite is a variety of rare and valuable opal-like gemstone, made from the fossilized shells of ammonites.
plankton
No, the Japanese are a modern ethnic group of people from Japan. Ammonites are ancient marine animals that went extinct millions of years ago.
Ammonites went extinct at the end of the Cretaceous Period.
Ammonites are very common fossils from the Jurassic Period. They were dominant in the ocean during and before the Jurassic Period.
Ammonites went extinct at the same time as the dinosaurs, about sixty-five million years ago.
They would prey on free-swimming, armored prey like arthropods, ammonites, and other placoderms.