Halgyrineum louisae
| 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 | |
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]
- ↑ Lewis H. (1974). "A new species of Hawaiian Gyrineum (Cymatiidae)". The Nautilus 88(1): 10-13.
- 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 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.