Scissurellidae Explained

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).^[1]

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).^[2] The monophyly of the family is questionable.^[3]

In 2003, there were about twenty-five genera divided into five subfamilies (Scissurellinae, Anatominae, Sutilizoninae, Temnocinclinae, Larocheinae) .^[4] 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)^[5] elevated Depressizoninae to the family rank as Depressizonidae.

Genera

Genera in the family Scissurellidae include:^{[6] [7] [8]}

• 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 ^[9]

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

• Geiger D. L. & Thacker C. E.. 2005. Molecular phylogeny of Vetigastropoda reveals non-monophyletic Scissurellidae, Trochoidea, and Fissurelloidea. Molluscan Research. 25. 1. 47–55.
• 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., PDF.
• 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

Notes and References

1. 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
2. Geiger D. L. (2006). "Eight new species of Scissurellidae and Anatomidae (Mollusca: Gastropoda: Vetigastropoda) from around the world, with discussion of two new senior synonyms". Zootaxa 1128: 1–33. PDF.
3. Geiger D. L. & Jansen P. (2004). "New species of Australian Scissurellidae (Mollusca: Gastropoda: Vetigastropoda) with remarks on Australian and Indo-Malayan species". Zootaxa 714: 1–72. abstract.
4. 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 from Easter Island and Australia". Molluscan Research 23(1): 21-83., abstract. PDF.
5. Geiger D. L.(8 May 2009) "A new species of Depressizona and the family rank of Depressizonidae". Zootaxa 2059: 57-59. abstract, full article.
6. [Arthur William Baden Powell|Powell A. W. B.]
7. http://seashellsofnsw.org.au/Scissurellidae/Pages/scissurellidae_intro.htm Seashells of NSW
8. Web site: Archived copy . 31 January 2008 . 10 February 2012 . https://web.archive.org/web/20120210054941/http://zipcodezoo.com/Key/Scissurellidae_Family.asp . dead .
9. 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