Depressizonidae

Depressizona
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
(unranked):	clade Vetigastropoda
Superfamily:	Scissurelloidea
Family:	Depressizonidae Geiger, 2003
Genus:	Depressizona Geiger, 2003
Type species
Depressizona exorum Geiger, 2003 (type by original designation)
Diversity
2 species

Depressizona is a genus of small to minute sea snails, marine gastropod molluscs or micromolluscs in the superfamily Scissurelloidea.

Depressizona is the only genus within the family Depressizonidae.

Depressizonidae was described as the subfamily Depressizoninae Geiger, 2003, in 2003. Then in 2005 it was considered to be a synonym of Scissurellinae in the family Scissurellidae according to the taxonomy of Bouchet & Roctoi (2005) and it has also been placed in Scissurellidae. In 2009 it was updated to the family level, Depressizonidae, when the second known species Depressizona axiosculpta was described.

Genus Depressizona contains two species only:

The shape of the shell is calyptraeiform.

...
Wikipedia