Graphoceras

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Graphoceras
Temporal range: Middle Jurassic
Scientific classification
Phylum: Mollusca
Class: Cephalopoda
Subclass: Ammonoidea
Order: Ammonitida
Superfamily: Hildocerataceae
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.

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

References[edit]

  • Arkell, et al., 1957. Mesozoic Ammonoidea (L264), Treatise on Invertebrate Paleontology Part L. Geological Society of America and University of Kansas Press.
  • Sepkoski list of Cephalopod genera. [1]