Abyssochrysoidea

Abyssochrysoidea is a superfamily of deep-water sea snails, marine gastropod mollusks unassigned in the order Caenogastropoda. ^[1]

Abyssochrysoidea
Two preserved specimens of Alviniconcha hessleri, family Provannidae
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Caenogastropoda
Superfamily:	Abyssochrysoidea Tomlin, 1927

These marine snails are part of the fauna of the hydrothermal vents and other deep-water habitats.

Families

Families within the superfamily Abyssochryoidea include:

• Abyssochrysidae Tomlin, 1927
• Provannidae Warén & Ponder, 1991
• † Hokkaidoconchidae Kaim, R. G. Jenkins & Warén, 2008
• unassigned : one genus Rubyspira Johnson, Warén, Lee, Kano, Kaim, Davis, Strong & Vrijenhoek, 2010

These two families Provaniidae and Abyssochrysidae were previously placed in the "Zygopleuroid group" (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005).

Subsequently Provannidae was placed in the superfamily Abyssochrysoidea by Kaim et al. (2008)^[2] and then Abyssochrysidae was also moved to Abyssochrysoidea.^[3]