Ptycholytoceras is a genus of fast-moving nektonic ammonoid carnivores[2] included in the Lytoceratinae in which the shell has round inner and depressed outer whorls and sides with dorso-ventrally sloping folds that do not pass onto the venter (outer rim).
| Ptycholytoceras Temporal range:
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Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | †Ammonoidea |
| Order: | †Ammonitida |
| Family: | †Lytoceratidae |
| Subfamily: | †Lytoceratinae |
| Genus: | †Ptycholytoceras Spath, 1927 |
| Species | |
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The type species Phycholyioceras humile (Prinz), named by Spath, 1924, first described as Lytoceras humile by Prinz in 1904, came from the Lower Jurassic (Toarcian)[1] of Hungary.
References
editW.J.Arkell et al., 1957. Mesozoic Ammonoidea, Treatise on Invertebrate Paleontology, Part L. Geological Society of America and Univ Kansas press.
- ^ a b Sepkoski, Jack (2002). "Sepkoski's Online Genus Database". Retrieved 2014-05-28.
- ^ "Paleobiology Database". Retrieved 2014-05-28.
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