Zalipais lissa

Zalipais lissa is a species of minute sea snail, a marine gastropod mollusc in the family Skeneidae.[1]

Zalipais lissa
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Clade: Vetigastropoda
Order: Trochida
Superfamily: Trochoidea
Family: Skeneidae
Genus: Zalipais
Species:
Z. lissa
Binomial name
Zalipais lissa
(Suter, 1908)
Synonyms
  • Cyclostrema lissum Suter, 1908
  • Delphinoidea lissa Suter, 1908
  • Unknown lissum Suter, 1908
  • Zalipais lissum Suter, 1908

Description

The height of the shell attains 0.6 mm, its diameter 1.0 mm. The thin, yellowish-white shell is minute and has a discoidal shape. It is umbilicated. To the naked eye the shell appears to be quite smooth, but under magnification reveals subequidistant, strongly undulating, radiate threads. No spiral sculpture is visible. The spire is flat, the nucleus only being slightly raised. The protoconch consists of one smooth whorl, which is convex, and the first half very often slightly elevated. The teleoconch consists of two whorls, the last one flatly convex above. The periphery and the baseof the shell are rounded. The suture is impressed. The subcircular aperture is a little angled above. The continuous peristome is sharp. The outer lip is advancing, and producing a distinct notch at the suture. The columella is arcuate and slightly thickened. The open umbilicus is moderate.[2]

Distribution

This marine species occurs off New Zealand and off the Tasmanian coast.

gollark: I'm not sure if you get to pick them individually or if it's as a class somehow.
gollark: As well as the basic stuff the spec we're doing has "Astrophysics", "Medical physics", "Turning points in physics", "Engineering physics (re-branded Applied physics)" and "Electronics" options, it seems.
gollark: Specifically under "Turning points in physics", which is one of the six optional modules (it seems convoluted and weird).
gollark: I checked the A-level spec just now and apparently it does cover special relativity.
gollark: very relevant random GIF?

References
  1. Rosenberg, G. (2012). Zalipais lissa. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=598344 on 2012-09-08
  2. Suter, Proceedings of the Malacological Society, viii, 25, pl. 2, f.10, 11 (described as Delphinoidea lissa)
  • Powell A. W. B., New Zealand Mollusca, William Collins Publishers Ltd, Auckland, New Zealand 1979 ISBN 0-00-216906-1
  • Cotton, B. C. (1959). South Australian Mollusca. Archaeogastropoda. Adelaide. : W.L. Hawes. 449 pp., 1 pl.
  • Spencer, H.G.; Marshall, B.A.; Maxwell, P.A.; Grant-Mackie, J.A.; Stilwell, J.D.; Willan, R.C.; Campbell, H.J.; Crampton, J.S.; Henderson, R.A.; Bradshaw, M.A.; Waterhouse, J.B.; Pojeta, J. Jr (2009). Phylum Mollusca: chitons, clams, tusk shells, snails, squids, and kin, in: Gordon, D.P. (Ed.) (2009). New Zealand inventory of biodiversity: 1. Kingdom Animalia: Radiata, Lophotrochozoa, Deuterostomia. pp. 161–254.
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