Graphoceras

Graphoceras; Temporal range: Aalenian–Bajocian PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Cephalopoda
Order:	Ammonitida
Family:	Graphoceratidae
Genus:	Graphoceras; Buckman, 1898

Graphoceras is an extinct ammonite genus included in the hildoceratacean family Graphoceratidae that lived during the Bajocian stage, Middle Jurassic in what is now Europe, north Africa, and Iran. ^[2]

Graphoceras produced a compressed, involute shell with a raised umbilical edge and sinuous ribbing.

References

Notes

^ Sepkoski, Jack (2002). "A compendium of fossil marine animal genera (Cephalopoda entry)". Bulletins of American Paleontology. 363: 1–560. Archived from the original on 2008-05-07. Retrieved 2017-10-18. {{cite journal}}: |archive-date= / |archive-url= timestamp mismatch; 2016-02-25 suggested (help); Unknown parameter |deadurl= ignored (|url-status= suggested) (help)
^ "Paleobiology Database - Graphoceras". Retrieved 2017-10-19. {{cite web}}: Cite has empty unknown parameter: |coauthors= (help)

Bibliography

Arkell, et al., 1957. Mesozoic Ammonoidea (L264), Treatise on Invertebrate Paleontology Part L. Geological Society of America and University of Kansas Press.

[Sepkoski_Ceph-1] Sepkoski, Jack (2002). "A compendium of fossil marine animal genera (Cephalopoda entry)". Bulletins of American Paleontology. 363: 1–560. Archived from the original on 2008-05-07. Retrieved 2017-10-18. {{cite journal}}: |archive-date= / |archive-url= timestamp mismatch; 2016-02-25 suggested (help); Unknown parameter |deadurl= ignored (|url-status= suggested) (help)

[paleodb-2] "Paleobiology Database - Graphoceras". Retrieved 2017-10-19. {{cite web}}: Cite has empty unknown parameter: |coauthors= (help)

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[2]