Ptychitidae
The Ptychitidae is a family of ceratitid ammonites (ammonites sensu lato). They are combined with the Eosagenitidae and Sturiidae in the superfamily Ptychitoidea.
| Ptychitidae Temporal range: M-U Triassic | |
|---|---|
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| Fossil of Ptychites studeri from Bosnia, on display at Galerie de paléontologie et d'anatomie comparée in Paris | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | †Ammonoidea |
| Order: | †Ceratitida |
| Superfamily: | †Ptychitoidea |
| Family: | †Ptychitidae Mojsisovics 1882 |
Ptychitid genera have compressed, involute shells in which the inner whorls are covered by the outermost, that may be ribbed or smooth, and ammonitic sutures with secondary elements.
References
- Arkell, et al., 1957. Mesozoic Ammonoidea, in the Treatise on Invertebrate Paleontology, Part L . R. C.Moore (ed). Geological Society of America and Univ of Kansas press.
- Ptychitidae-Paleodb
- classification of E.T. Tozer, 1994
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