Ptychitidae
| 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: | Ptychitaceae |
| Family: | Ptychitidae Mojsisovics 1882 |
The Ptychitidae comprises a family of ceratitid ammonites (ammonites sensu lato). They are combined currently with the Eosagenitidae and Sturiidae in the superfamily, Ptychitaceae.
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 elelments.
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