Yakounia

Yakounia
Temporal range: Toarcian
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: Ammonoidea
Order: Ammonitida
Family: Hildoceratidae
Genus: Yakounia

Yakounia is an evolutely coiled, planispiral ammonite, coiled so all whorls are exposed, with close transverse ribbing. This genus lived during the Toarcian stage, late early Jurassic, and has been found in western British Columbia. The brief description is based on that of the subfamily.

Yakounia is included in the hildoceratid family, subfamily Grammoceratinae. Related genera include such as Grammoceras, Costigrammoceras, and Phenakocerites

References

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