Ptycholytoceras

Ptycholytoceras; Temporal range: Toarcian PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Cephalopoda
Subclass:	†Ammonoidea
Order:	†Ammonitida
Family:	†Lytoceratidae
Subfamily:	†Lytoceratinae
Genus:	†Ptycholytoceras; Spath, 1927
Species
	See text

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).

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[]

W.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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[Sepkoski_Ceph-1] Sepkoski, Jack (2002). "Sepkoski's Online Genus Database". Retrieved 2014-05-28.

[fossilworks-2] "Paleobiology Database". Retrieved 2014-05-28.

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