Sinezona beddomei

Sinezona beddomei
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Clade: Vetigastropoda
Superfamily: Scissurelloidea
Family: Scissurellidae
Genus: Sinezona
Species: S. beddomei
Binomial name
Sinezona beddomei
(Petterd, 1884) [1]
Synonyms[2]
  • Schismope beddomei Petterd, 1884

Sinezona beddomei is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Scissurellidae, the little slit snails.[2][3]

Description

The shell reaches a height of 0.8 mm. The small shell is turbinately depressed and umbilicate. It is sordidly white, dull, and thin. The spire is low and tabulated. The 3½ whorls are apical flat. The whorls are very rapidly increasing in size. The spiral sculpture is formed by a strong keel of the raised edges of the canal scar. Above and below this keel the body whorl is distinctly concave and smooth. The sinus is conspicuous with raised margin. The shell is longitudinally plicate, with the plicae more prominent at the base. There are a few short radiate riblets spreading from the suture on the upper side. The base of the shell has about 12 distant, sharp and strong, oblique riblets. The oblique aperture is ovate and of moderate size. The outer lip is sharp, and broadly convex. The inner lip spreads a short distance over the body, and forms a sharp angle with the outer lip. The columella is concave truncated below, and slightly callous. The umbilicus is rather large and deep. The anal perforation has raised margins. it is moderately long, rounded behind, pointed in front, with a very distinct callosity on the inner side.[4] [5]

Distribution

This marine species occurs off New South Wales to West Australia; off New Zealand

References

  1. ↑ Petterd, Quart. Journ. Conch. 1884, vol. iv, p. 139.
  2. 1 2 Bouchet, P. (2013). Sinezona beddomei (Petterd, 1884). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=492808 on 2013-02-16
  3. ↑ 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)
  4. ↑ G.W. Tryon (1890), Manual of Conchology vol. XII (described as Schismope beddomei)
  5. ↑ Suter H. (1913-1915), Manual of New Zealand Mollusca; Wellington, N. Z. :J. Mackay, govt. printer,1913-1915

External links

External identifiers for Sinezona beddomei
Encyclopedia of Life 4793638
WoRMS 492808
This article is issued from Wikipedia - version of the Sunday, March 24, 2013. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.