Depressizona

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

Depressizona
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
(unranked):	clade Vetigastropoda
Superfamily:	Scissurelloidea
Family:	Depressizonidae Geiger, 2003[1]
Genus:	Depressizona Geiger, 2003[1]
Type species
Depressizona exorum Geiger, 2003 (type by original designation)
Diversity[2]
2 species

Depressizona is the only genus within the family Depressizonidae.^[2]

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)^[3] and it has also been placed in Scissurellidae.^[4] In 2009 it was updated to the family level, Depressizonidae, when the second known species Depressizona axiosculpta was described.^[2]

Species

Genus Depressizona contains two species only:

• Depressizona axiosculpta Geiger, 2009^[2][5] It was described from only one specimen in poor condition known from Tonga. Geiger (2012) illustrated a second specimen in much better condition.
• Depressizona exorum Geiger, 2003^[6] - from Easter Island. Type species of the genus Depressizona.

Description

The shape of the shell is calyptraeiform.