Ptychodus
Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Classis: Chondrichthyes
Subclassis: Elasmobranchii
Infraclassis: Euselachii
Division/Cohort: Neoselachii
Subdivision/Subcohort: Selachimorpha
Familia: †Ptychodontidae
Genus: †Ptychodus
Species:
†P. altior –
†P. arcuatus –
†P. articulatus –
†P. belluccii –
†P. concentricus –
†P. decurrens –
†P. elevatus –
†P. gibberulus –
†P. latissimus –
†P. mahakalensis –
†P. mammillaris –
†P. marginalis –
†P. mortoni –
†P. multistriatus –
†P. oweni –
†P. paucisulcatus –
†P. polygyrus –
†P. rhombodus –
†P. rugosus –
†P. spectabilis –
†P. whipplei
Name
[edit]†Ptychodus Agassiz, 1837
References
[edit]- Agassiz, J.L.R. 1837. Recherches Sur Les Poissons Fossiles. Tome III (livr. 8–9). Imprimérie de Petitpierre, Neuchatel viii–72. Reference page.
- Hoffman, B.L., Hageman, S.A. & Claycomb, G.D. 2016 Scanning electron microscope examination of the dental enameloid of the Cretaceous durophagous shark Ptychodus supports neoselachian classification. Journal of Paleontology, 90(4): 741–762. DOI: 10.1017/jpa.2016.64 .Reference page.