Alcyna subangulata

Alcyna subangulata
Drawing of a variety of a shell of Alcyna subangulata
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Vetigastropoda
Order:	Trochida
Superfamily:	Trochoidea
Family:	Trochidae
Genus:	Alcyna
Species:	A. subangulata
Binomial name
Alcyna subangulata Pease, 1861
Synonyms
Alcyna flammulataPilsbry, 1917 Alcyna lineataPease, 1869 Alcyna striataPease, 1869 Alcyna subangulata flammulataPilsbry, 1917 Alcyna subangulata virgataPilsbry, 1917 Alcyna virgataPilsbry, 1917 Nevillia pictaH. Adams, 1868 Rissoia pictaH. Adams, 1868 Thalotia subangulata(Pease, W.H., 1861)

Alcyna subangulata is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails. ^[1]

Description

The height of the shell attains 2½ mm, its diameter 1½ mm. The minute, rather solid, narrowly perforate shell has an ovate-turbinate shape. It is ornamented with raised spiral striae. The four whorls are depressed somewhat in the center. The body whorl is obtusely biangular with about four low spiral cords above the upper angle, two and a very weak third between the angles. The base of the shell contains numerous spirals. The outer lip is thickened externally with a swelling or varix. The umbilicus is rather large. The aperture is circular. The columella ends in a prominent tooth. The color is deep red, wtth oblique light red flames radiating from the suture. ^{[2] [3]}

Distribution

This marine species occurs off the Seychelles, Mauritius, Réunion and Hawaii.

References

1. Bouchet, P. (2013). Alcyna subangulata Pease, 1861. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=719077 on 2014-01-07
2. G.W. Tryon (1888), Manual of Conchology X; Academy of Natural Sciences, Philadelphia
3. H. Pilsbry, Marine Mollusks of Hawaii, I-III;Proceedings of the Academy of Natural Sciences of Philadelphia v. 69 (1917); pl. XV 5, 6, 7

• Adams, H. 1868. Descriptions of some new species of shells collected by Geoffrey Nevill, Esq., at Mauritius, the Isle of Bourbon, and the Seychelles. Proceedings of the Zoological Society of London 1868:288-292, pl. 28,
• Kay, E.A. (1979). Hawaiian marine shells. [Reef and shore fauna of Hawaii, Section 4: Mollusca. Bernice P. Bishop Museum Special Publication 64(4)]. Honolulu : Bishop Museum Press. xvii + 653 pp.

External links

• To World Register of Marine Species