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
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