A fossil of a prehistoric, fish-eating, crocodile-like, aquatic reptile at the natural history museum in Leiden.

It's a Mesosaurus that lived during the early Permian period, roughly 320 to 280 million years ago.

Mesosaurs on wikipedia

Kingdom: Animalia
Phylum: Chordata
Class: Sauropsida
Subclass: Anapsida
Order: Mesosauria
Family: Mesosauridae
Genus: Mesosaurus



Add a comment...
Your name:
Your e-mail:





About 23

About 23
What is 23 and who's behind the service?
Just In
Discover the world from a different angle.
Here's a crop of the latest photos from the around the world.
Search
Search photos from users using 23
Help / Discussion
Get help or share your ideas to make 23 better
23 Blog / 23 on Twitter
Messages and observations from Team 23
Terms of use
What can 23 be used for and what isn't allowed
More services from 23
We also help people use photo sharing in their professional lives
  • Basque (ES)
  • Bulgarian (BG)
  • Chinese (CN)
  • Chinese (TW)
  • Danish (DK)
  • Dutch (NL)
  • English (US)
  • French (FR)
  • Galician (ES)
  • German (DE)
  • Italian (IT)
  • Norwegian (NO)
  • Polish (PL)
  • Portuguese (PT)
  • Russian (RU)
  • Spanish (ES)
  • Swedish (SE)

Popular photos right now

See also