Halgyrineum louisae

From Wikipedia, the free encyclopedia
Halgyrineum louisae
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
(unranked): clade Caenogastropoda
clade Hypsogastropoda
clade Littorinimorpha
Superfamily: Tonnoidea
Family: Ranellidae
Subfamily: Ranellinae
Genus: Halgyrineum
Species: H. louisae
Binomial name
Halgyrineum louisae
(Lewis, 1974)[1]
Synonyms[2]

Gyrineum atlanticum Fechter, 1975
Gyrineum louisae Lewis, 1974

Halgyrineum louisae is a species of predatory sea snail, a marine gastropod mollusk in the family Ranellidae, the triton snails, triton shells or tritons.[2]

Description

The shell is up to 28 mm high, with a rather high spire, characteristically flattened along an axis perpendicular to the aperture.[2] Protoconch is with 3 whorls, the protoconch I is less than one whorl with a frosted surface, the protoconch II with a conspicuous sculpture of axial ribs and spiral cords, both narrower than the interspaces and forming a regular lattice.[2] Teleoconch is with 5-6 rounded whorls.[2] Sculpture of low, subequal spiral cords, as broad as the interspaces, with low and narrow axial ribs forming small knobs at their intersection with the cords.[2] Varixes are situated along the broadest section of the shell, moderately thick, repeated after a little more than half a whorl so that they are slightly and regularly offset along the spire, overrun by the spirals.[2] The aperture is oval; outer lip faintly fluted inside; parietal and columellar edge forming a continuous callus, the parietal edge with a small but well-marked denticle, the columella is faintly tuberculate.[2] Siphonal canal is open, moderate in length.[2] Shell colour is from very light tan to whitish.[2]

Distribution

The type locality is Oahu, Hawaii, 180 fathoms (333 m).[2]

Distribution of Halgyrineum louisae include:

  • scattered localities in the Indo-Pacific: Hawaii, French Polynesia, the Norfolk Ridge, New Caledonia, and Réunion, with a depth range 80–460 m.[2]
  • the Atlantic: Great Mteor, Hyères and Irving seamounts, rare in 310–460 m.[2]

Life cycle

Type of larval development: long planktotrophic (teleplanic), inferred from multispiral protoconch with well-developed protoconch II.[2]

References

This article incorporates CC-BY-SA-3.0 text from the reference.[2]

  1. Lewis H. (1974). "A new species of Hawaiian Gyrineum (Cymatiidae)". The Nautilus 88(1): 10-13.
  2. 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 2.10 2.11 2.12 2.13 2.14 Halgyrineum louisae (Lewis, 1974). Gofas, S. (2009). Halgyrineum louisae (Lewis, 1974). In: Bouchet, P.; Gofas, S.; Rosenberg, G. World Marine Mollusca database. Accessed through the World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=181010 on 27 June 2010.

External links

    This article is issued from Wikipedia. The text is available under the Creative Commons Attribution/Share Alike; additional terms may apply for the media files.