Sukashitrochus atkinsoni

Sukashitrochus atkinsoni is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Scissurellidae, the little slit snails.[1][3][4]

Sukashitrochus atkinsoni
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Vetigastropoda
Clade: Lepetellida
Superfamily: Scissurelloidea
Family: Scissurellidae
Genus: Sukashitrochus
Species:
S. atkinsoni
Binomial name
Sukashitrochus atkinsoni
(Tenison Woods, 1877)
Synonyms[1][2]
  • Schismope carinata Watson, 1886
  • Schismope tasmanica Petterd, 1879
  • Scissurella atkinsoni Tenison Woods, 1877
  • Sukashitrochus tasmanicus (Petterd, 1879)

Description

The minute, brown shell attains a height of 2 mm. It has a globose-depressed shape. The spire is short, low, and blunt. The three whorls widen rapidly and are plane above. The last whorl descends very deeply toward the aperture, with a strong keel at the shoulder, occupied by the anal fasciole, and another keel at the periphery, the space between them concave. Below this carina there are about 3 rather separated spiral lira, and around the umbilicus three more. The keels are obsolete for a short distance behind the aperture. The fine growth striae are scarcely perceptible. The slit fasciole present on the last 1½ whorls is very narrow. Its edgesare pinched up into a strong keel. It terminates about ½ mm or ¾ mm behind the peristome in a long, narrow slot. The ovate aperture is very oblique. It is narrowed above. The columella is slightly arcuate, and nearly vertical. The umbilicus is narrowly perforated, funnel-shaped, and smooth inside. On old shells the median carina becomes rounded on the last ¾ whorl, and there are numerous spiral riblets both above and below the slit fasciole.[5]

Distribution

This marine species occurs off Queensland to South Australia and Western Australia; off Tasmania

References

  1. Bouchet, P. (2013). Sukashitrochus atkinsoni. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=492828 on 2013-02-16
  2. Tennison-Woods, Proc. Roy. Soc. Tasm. 1876, p. 149
  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.
  4. 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. (30 October 2012) (described as Scissurella atkinsoni)
  5. G.W. Tryon (1890), Manual of Conchology vol. XII
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.