Clionitidae is a family of generally evolute, Upper Triassic, ammonoids with a ventral furrow usually bordered by rows of tubercles and whorl sides ornamented by sigmoidal ribs which may bear spiral rows of tubercles. The suture is ceratitic.
| Clionitidae Temporal range: Upper Triassic
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Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | †Ammonoidea |
| Order: | †Ceratitida |
| Superfamily: | †Clydonitoidea |
| Family: | †Clionitidae Arbu, 1932 |
The Clionitidae belong to the Ceratitida and are included in the superfamily Clydonitoidea. Their fossils have been found in Carnian and/or Norian sediments in California, Nevada British Columbia, the Alps, Balkans, Himalaya, and on Timor.
Among its genera are Clionites, Alloclionites, Californites, and Traskites
References edit
- Treatise on Invertebrate Paleontology, Part L, Ammonoidea. R. C. Moore (ed). Geological Society of America and Univ of Kansas press, 1957
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