Playing on


Naturalis Biodiversity Center

Naturalis Biodiversity Center

An Ammonite shell looks very much like a curly ram’s horn. That’s also where the name comes from. It’s named after the Egyptian god Ammon whose symbol was a ram’s horn. That shell was home to a mollusc which had ten tentacles like a squid. The animal used the shell like a submarine and was very good at floating thanks to the shell.

The male and female look different. This is called sexual dimorphism. The male has a hook-shaped shell, while the female has a curly shell.

One of its enemies was the prehistoric squid without a shell. This creature attacked the ammonite from behind and bit through its prey’s shell.

The ammonites lived from the Devonian period (410-360 million years ago) and died out at the same time as the dinosaurs at the end of the Chalk period.

Show lessRead more


  • Title: Ammonite
  • Location: All the world's oceans
  • Rights: Photo's by Sabine Verdoorn / Naturalis Biodiversity Center / CC-BY 4.0
  • Wetenschappelijke naam: Kutatisitis creutzbergi
  • Tijdperk: Devonian (410-360 million years ago) - Cretaceous (about 65 million years ago)
  • Registratienummer : RGM 345790
  • Meer informatie: http://www.natuurinformatie.nl/nnm.dossiers/natuurdatabase.nl/i001038.html
  • Lengte: Less than one centimeter to more than 2.5 meters in diameter.
  • Klasse: Mollusc
  • Eetgewoontes: Fish


Translate with Google