Admetula garrardi

Admetula garrardi
Shell of Admetula garrardi (specimen at MNHN, Paris)
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Caenogastropoda
Order:	Neogastropoda
Family:	Cancellariidae
Genus:	Admetula
Species:	A. garrardi
Binomial name
Admetula garrardi Petit, 1974
Synonyms [1]
Bonellitia garrardi(Petit, 1974) Neadmete nassoidesSchepman, M.M., 1911 Cancellaria (Bonellitia) nassoidesSchepman, 1911 Cancellaria (Merica) nassoidesSchepman, 1911 (Invalid: junior homonym of Cancellaria nassoidesKoenen, 1889; Admetula garrardi is a replacement name)

Admetula garrardi is a species of sea snail, a marine gastropod mollusk in the family Cancellariidae, the nutmeg snails. ^[1]

Description

The shell size varies between 10mm and 17mm.

(Described as Cancellaria (Merica) nassoides) The dull brown, elongately-ovate shell is imperforate.

The spire is elongately-turreted. The shell contains 7½ convex whorls, separated by a very deep suture. The two apical whorls are smooth, while the subsequent whorls are adorned first with 3 robust, spiral lirae and thinner intermediate ones. There are four lirae on the penultimate whorl along with 6 intermediate ones, two of which lie near the suture. The lirae are crossed by more remote rounded ribs, having sometimes the appearance of varices, numbering seventeen on the body whorl, the lirae forming small nodules where they cross the ribs. Additionally the shell is covered with fine striae, crossing the lirae, lending them a subtle crenulated appearance. The small aperture is ovate. The outer lip is regularly arched, hosting seven short lirae spaced at a distance from the margin. The columellar margin is adorned with a thin, yellowish-white layer of enamel, which does not obscure the shell's sculpture. Three robust plaits adorn the columellar margin, with the upper ones exhibiting slight obliqueness and a perpendicular fold at approximately a right angle with the plaits. The basal plait is more oblique, and borders the large, shallow sinus. While lacking an umbilicus, the shell does possess an umbilical chink. ^[2]

It was later discovered that the name Cancellaria nassoides had already been used by Koenen in 1889 for a different species. ^[3]

Distribution

This species is distributed in the Persian Gulf, Indonesia and the Western Pacific.

References

1. Admetula garrardi Petit, 1974 . Retrieved through: World Register of Marine Species  on 30 October 2010.
2. • Schepman, M. M. (1911). The Prosobranchia of the Siboga Expedition. Part IV. Rachiglossa. Siboga-Expeditie. 49d: 247-363, pls 18–24. Leiden, E.J. Brill This article incorporates text from this source, which is in the public domain .
3. Bouchet, P. (2011). "Admetula garrardi (Petit, 1974)". WoRMS. World Register of Marine Species . Retrieved 22 May 2024.

• Petit, R.E. & Harasewych, M.G. (2005) Catalogue of the superfamily Cancellarioidea Forbes and Hanley, 1851 (Gastropoda: Prosobranchia)- 2nd edition. Zootaxa, 1102, 3–161. NIZT 682
• Verhecken A. (2011) The Cancellariidae of the Panglao Marine Biodiversity Project 2004 and the Panglao 2005 and Aurora 2007 deep sea cruises in the Philippines, with description of six new species (Neogastropoda, Cancellarioidea). Vita Malacologica 9: 1-60.

External links

• R. E. (1974). Notes on Japanese Cancellariidae. Venus. 33 (3): 109-115