Ammonoidea
Query URLs
https://term.museum-digital.de/md-de/tag/5581
- Note
- "Ammonoids are a group of extinct marine mollusc animals in the subclass Ammonoidea of the class Cephalopoda. These molluscs, commonly referred to as ammonites, 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 vanished in the Cretaceous–Paleogene extinction event.
Ammonites are excellent index fossils, and it is often possible to link the rock layer in which a particular species or genus is found to specific geologic time periods. Their fossil shells usually take the form of planispirals, although there were some helically spiraled and nonspiraled forms (known as heteromorphs)." - (en.wikipedia.org 18.12.2020)
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Nautilus
Die Nautiliden gehören der...
Object information
Image: Harzmuseum Wernigerode - CC BY-NC-SA -
Arietites bucklandi
Großer Ammonit in...
Object information
Image: Dr. Klaus Naumburg, Bad Soden / Ts. - CC BY-NC-SA -
Otohoplites bulliensis
Ammonit in opalisierender...
Object information
Image: Gerhard Lichter, Biberach a.d.Riß - CC BY-NC-SA -
Ammonit Peltomorphites
Peltomorphites cf....
Object information
Image: Geomuseum der WWU Münster - CC BY-NC-SA -
Ammonit Platylenticeras
Dies sind zwei Ammoniten der...
Object information
Image: Geomuseum der WWU Münster - CC BY-NC-SA
References
Synonyms
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