Hiloa variabilis

Hiloa variabilis
Shell of Hiloa variabilis (specimen at Naturalis Biodiversity Center)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Vetigastropoda
Order:	Trochida
Superfamily:	Trochoidea
Family:	Phasianellidae
Genus:	Hiloa
Species:	H. variabilis
Binomial name
Hiloa variabilis (Pease, 1860)
Synonyms [1]
Collonia variabilisPease, 1860 (original combination) Eutropia (Tricolia) virgoAngas, 1867 Eutropia virgoAngas, 1867 Phasianella gregariaLaseron, C.F., 1955 Phasianella megastomaPilsbry, 1895 (junior synonym) Phasianella oligomphalaPilsbry, 1895 (junior synonym) Phasianella thaanumiPilsbry, 1917 Phasianella variabilisPease, Pilsbry, 1888 Tricolia bryaniPilsbry, H.A., 1917 Tricolia megastomaPilsbry, H.A., 1895 Tricolia molokaiensisPilsbry, H.A., 1917 Tricolia oligomphala(Pilsbry, 1895) Tricolia thaanumiPilsbry, H.A., 1917 Tricolia variabilis(Pease, 1861) Tricolia virgoAngas, G.F., 1867

Hiloa variabilis, common name the minute pheasant, is a species of small sea snail with calcareous opercula, a marine gastropod mollusk in the family Phasianellidae, the pheasant snails. ^{[1] [2] [3]}

Description

The thin, ovate, rather solid shell has a moderately long and shining spire. Its height is 5 mm. The 3-4 convexly rounded whorls are marked with very fine oblique longitudinal striae. The inner lip is callous, slightly expanded at the base, indented at the umbilical region and with a groove behind the inner lip. The aperture is ovate. The color of the shell is white, variously painted with pink lines and blotches. These lines are fine, oblique, and extend over a portion of the whorls. They are sometimes flexuous and cover the whole surface. The blotches have a longitudinal shape. The periphery of the body whorl usually ornamented with a row of pink spots. The axis is perforate. The peristome does not project forward at junction of columellar and basal margins. ^[4]

Distribution

This species occurs in the tropical and temperate Indo-West Pacific, off Hawaii and off Australia.

References

1. Rosenberg, G. (2012). Tricolia variabilis (Pease, 1860). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=593922 on 2013-02-10
2. Robertson, R. 1985. Archaeogastropod biology and the systematics of the genus Tricolia (Trochacea: Tricoliidae) in the Indo-West Pacific. Monographs of Marine Mollusca 3: 1-103.
3. Bosch D.T., Dance S.P., Moolenbeek R.G. & Oliver P.G. (1995) Seashells of eastern Arabia. Dubai: Motivate Publishing. 296 pp.
4. G.W. Tryon (1888), Manual of Conchology X; Academy of Natural Sciences, Philadelphia

External links

• To Barcode of Life (1 barcode)
• To Biodiversity Heritage Library (3 publications)
• To GenBank (3 nucleotides; 2 proteins)
• To ITIS
• To World Register of Marine Species
• "Tricolia variabilis". Gastropods.com. Retrieved 16 January 2019.
• Pease, W. H. (1861). Descriptions of forty-seven new species of shells from the Sandwich Islands, in the collection of Hugh Cuming. Proceedings of the Zoological Society of London. 28: 431-438
• Pilsbry, H.A. (1917). Marine mollusks of Hawaii, I-III. Proceedings of the Academy of Natural Sciences of Philadelphia. 69: 207-230, pls 14-15
• Laseron, C. F. (1955). The identity of Phasianella virgo. Proceedings of the Royal Zoological Society of New South Wales. (1953-1954): 77-78
• Angas, G. F. (1867). Descriptions of thirty-two species of marine shells from the coast of New South Wales. Proceedings of the Zoological Society of London. (1867): 110-117, pl. 13
• Pilsbry, H. A. (1895). Catalogue of the marine shells of Japan with descriptions of new species and notes on others collected by Frederick Stearns. F. Stearns, Detroit, viii + 196 pp, 11 pls
• Herbert D.G. (2015). An annotated catalogue and bibliography of the taxonomy, synonymy and distribution of the Recent Vetigastropoda of South Africa (Mollusca). Zootaxa. 4049(1): 1-98