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]