Hokkaidoconchidae

Hokkaidoconchidae, common name hokkaidoconchids, is an extinct family of deep-water sea snails, marine gastropod mollusks.[2]

Hokkaidoconchidae
Two shells of Hokkaidoconcha occidentalis from the original 1895 description.
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
(unranked):	clade Caenogastropoda
Superfamily:	Abyssochrysoidea
Family:	Hokkaidoconchidae Kaim, Jenkins & Warén, 2008[1]

Shell description

The shell is small and elongate.[2]

Genera

• Hokkaidoconcha Kaim, Jenkins & Warén, 2008 - type genus
  • Hokkaidoconcha tanabei Kaim, Jenkins & Warén, 2008 - the type species from the upper Cretaceous in Japan
  • Hokkaidoconcha bilirata Kiel, Campbell, Elder & Little, 2008 - from the lower Cretaceous in Wilbur Springs, California, USA[2]
  • Hokkaidoconcha morenoensis Kiel, Campbell, Elder & Little, 2008 - from the upper Cretaceous in Moreno Gulch, California, USA[2]
  • Hokkaidoconcha occidentalis (Stanton, 1895) - synonym Hypsipleura? occidentalis Stanton, 1895[3] - from the upper Jurassic to the lower Cretaceous in California: Paskenta, California, Berryessa, San Jose, California, Wilbur Springs, California[2]
  • Hokkaidoconcha tehamaensis Kiel, Campbell, Elder & Little, 2008 - from the upper Jurassic in Paskenta, California, USA[2]

References

1. Kaim A., Jenkins R.G. & Warén A. 2008. Provannid and provannid−like gastropods from Late Cretaceous cold seeps of Hokkaido (Japan) and the fossil record of the Provannidae (Gastropoda: Abyssochrysoidea). Zoological Journal of the Linnean Society 154: 421–436.
2. Kiel, S., Campbell, K.A., Elder, W.P., and Little, C.T.S. 2008. Jurassic and Cretaceous gastropods from hydrocarbon seeps in forearc basin and accretionary prism settings, California. Acta Palaeontologica Polonica 53 (4): 679–703.
3. Stanton T. W. 1895. Contributions to the Cretaceous paleontology of the Pacific coast: the fauna of the Knoxville beds. United States Geological Survey Bulletin 133: 1–132.