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Garantiana

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Kingdom
  
Subclass
  
Superfamily
  
Stephanocerataceae

Scientific name
  
Garantiana

Rank
  
Genus

Phylum
  
Order
  
Higher classification
  
Garantiana httpsuploadwikimediaorgwikipediacommonsthu

Similar
  
Dorsetensia, Grammoceras, Euaspidoceras, Euhoplites, Gleviceras

Garantiana is a strongly ribbed, generally evolute ammonite from the Bajocian stage at the beginning of the Middle Jurassic, included in the family Stephanoceratidae. Inner whorls are exposed in a wide and fairly deep umbilicus. Ribs arise at the umbilical margin and split in two (bifurcate) about midway up the sides and cross over the outer (ventral) rim.

Garantiana was named by d'Orbigny, 1845, the type species is Garantiana garantiana, which comes from France. Related genera include Orthogarantiana Pseudogarantiana, and Strenoceras.

References

Garantiana Wikipedia


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