Jump to content

Halgyrineum louisae

From Wikipedia, the free encyclopedia

Halgyrineum louisae
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Caenogastropoda
Order: Littorinimorpha
Family: Cymatiidae
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 Cymatiidae.[2]

Description

[edit]

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

[edit]

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

Distribution of Halgyrineum louisae include:

Life cycle

[edit]

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

References

[edit]

This article incorporates CC-BY-SA-3.0 text from the reference the World Register of Marine Species.[2]

  1. ^ Lewis H. (1974). "A new species of Hawaiian Gyrineum (Cymatiidae)". The Nautilus 88(1): 10-13.
  2. ^ a b c d e f g h i j k l m n o Halgyrineum louisae (Lewis, 1974). Retrieved through: World Register of Marine Species on 5 December 2018.