Little Slit Shells

Scissurellidae, sometimes known by the common name little slit snails, are a taxonomic family of minute sea snails, marine gastropod molluscs or micromolluscs in the clade Vetigastropoda (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005).Bouchet, P. (2011). Scissurellidae. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=1730 on 2011-05-08

The shells of these snails vary in adult size from less than 6 mm to less than 1 mm.

Distribution

Scissurellids occur world-wide, from the intertidal zone down to the abyssal depths, including around hydrothermal vents.

Taxonomy

There are about 169 living described species of Scissurellidae, but the diversity of scissurellids is still far from being completely assessed (approximately 60 collected species await description). The monophyly of the family is questionable.

In 2003, there were about twenty-five genera divided into five subfamilies (Scissurellinae, Anatominae, Sutilizoninae, Temnocinclinae, Larocheinae) . Three of these subfamilies were later updated to family level.

According to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005), this family consisted of the two following subfamilies :
* Scissurellinae Gray, 1847 - synonym: Depressizoninae Geiger, 2003; now accepted with family rank Scissurellidae.
* Larocheinae Finlay, 1927: now elevated to family rank as Larocheidae.

However Geiger (2009)Geiger D. L.(8 May 2009) "A new species of ''Depressizona'' and the family rank of Depressizonidae". '' Zootaxa'' 2059: 57-59
abstractfull article
elevated Depressizoninae to the family rank as Depressizonidae.

Genera

Genera in the family Scissurellidae include:
* ''Coronadoa'' Bartsch, 1915
* '' Incisura'' Hedley, 1904
* ''Satondella'' Bandel, 1998
* '' Scissurella'' d'Orbigny, 1824
* ''Sinezona'' Finlay, 1927
* '' Sukashitrochus'' Habe & Kosuge, 1964
* '' Triassurella'' A. Nützel and D. L. Geiger. 2006 A. Nützel and D. L. Geiger. 2006. A new scissurelloid genus and species (Mollusca, Gastropoda) from the Late Triassic Cassian Formation. Paläontologische Zeitschrift 80(3):277-283

;Genera brought into synonymy:
* ''Ariella'' Bandel, 1998: synonym of ''Sinezona'' Finlay, 1926
* ''Daizona'' Bandel, 1998: synonym of ''Sinezona'' Finlay, 1926
* ''Maxwellella'' Bandel, 1998: synonym of ''Scissurella'' d'Orbigny, 1824
* † ''Praescissurella'' Lozouet, 1998: synonym of ''Scissurella'' d'Orbigny, 1824
* † ''Reussella'' Bandel, 1998: synonym of ''Scissurella'' d'Orbigny, 1824
* ''Schismope'' Jeffreys, 1856: synonym of ''Scissurella'' d'Orbigny, 1824
* ''Scissurona'' Iredale, 1824: synonym of '' Incisura'' Hedley, 1904
* ''Temnocinclis'' - in its own family Sutilizonidae
* ''Temnozaga'' - in its own family Sutilizonidae
* ''Woodwardia'' Crosse & P. Fischer, 1861: synonym of ''Scissurella'' d'Orbigny, 1824

References

* Geiger D.L. (2003). ''Phylogenetic assessment of characters proposed for the generic classification of Recent Scissurellidae (Gastropoda: Vetigastropoda) with a description of one new genus and six new species frop Easter Island and Australia''. Molluscan Research 23:21-83
* Geiger D.L. (2012) ''Monograph of the little slit shells. Volume 1. Introduction, Scissurellidae. pp. 1-728. Volume 2. Anatomidae, Larocheidae, Depressizonidae, Sutilizonidae, Temnocinclidae''. pp. 729–1291. Santa Barbara Museum of Natural History Monographs Number 7.

Further reading

*
* Marshall B. A. (2002). "Some recent scissurellids from the New Zealand region and remarks on some scissurellid genus group names (Mollusca : Gastropoda : Vetigastropoda)". ''Molluscan Research'' 22(2): 165–181.
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* Zelaya D. G. & Geiger D. L. (2007). "Species Of Scissurellidae and Anatomidae From Sub-Antarctic and Antarctic Waters (Gastropoda: Vetigastropoda)". '' Malacologia'' 49(2): 393–443.

External links

Natural History Museum Rotterdam page of images of this family

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Taxa named by John Edward Gray