Ptychitidae

Ptychitidae Temporal range: M Triassic - U Triassic PreꞒ Ꞓ O S D C P T J K Pg N
Fossil of Ptychites studeri from Bosnia, on display at Galerie de paléontologie et d'anatomie comparée in Paris
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Cephalopoda
Subclass:	†Ammonoidea
Order:	†Ceratitida
Superfamily:	†Ptychitoidea
Family:	†Ptychitidae Mojsisovics 1882

The Ptychitidae is a family of ceratitid ammonites (ammonites sensu lato). They are combined with the Eosagenitidae and Sturiidae in the superfamily Ptychitoidea.

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.

Genera

• Arctoptychites
• Aristoptychites
• Eosturia
• Flexoptychites
• Istreites
• Lanceoptychites
• Malletoptychites
• Ptychites

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