Temporal range: Moscovian – Wordian
An artist's illustration of Clepsydrops collettii
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Family: Ophiacodontidae
Genus: Clepsydrops
Cope, 1877
  • Clepsydrops collettii
  • Clepsydrops natalis
  • Clepsydrops vinslovii

General Information

Clepsydrops was a small species of amniotes that lived from the Moscovian to the Wordian epochs (otherwise known as the middle Carboniferous to the late Permian). They lived in prehistoric northeastern North America, and hunted for small amphibians such as eocaecilia, and insects such as unsuspecting meganeura

Fossil Discoveries

The first clepsydrops fossils were found in Nova Scotia by Edward Drinker Cope in 1877.


These animals were ancestors (or close cousins of the ancestors) of the famous dimetrodon.

Scientific Errors

Originally, dimetrodon limbatus was identified as clepsydrops limbatus. This was corrected by Cope.

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