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About: Ptychitidae     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : dbo:Insect, within Data Space : dbpedia.demo.openlinksw.com associated with source document(s)

Type: insect New Facet based on Instances of this Class

The Ptychitidae is a family of ceratitid ammonites (ammonites sensu lato). They are combined with the and 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.