Arene bairdii

Arene bairdii
Shell of Arene bairdii (specimen at Naturalis Biodiversity Center)
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Vetigastropoda
Order:	Trochida
Superfamily:	Trochoidea
Family:	Areneidae
Genus:	Arene
Species:	A. bairdii
Binomial name
Arene bairdii (Dall, 1889)
Synonyms
Liotia bairdiiDall, 1889 superseded combination Liotia bairdii trullataDall, 1889 junior subjective synonym Liotia bairdii var. trullataDall, 1889 junior subjective synonym Liotia trullataDall, 1889 junior subjective synonym

Arene bairdii is a species of sea snail, a marine gastropod mollusc in the family Areneidae. ^[1]

Description

The shell can grow up to be 3.5 mm to 8 mm in length. ^[2]

(Original description) The shell is small and fusiform, composed of five post-nuclear whorls and an initial small, smooth protoconch. The spire is slightly tabulated, defined by a channelled suture and a central, smaller spiral ridge situated between two larger superior ridges.

The sculpture of the whorls is dominated by noduled, revolving ridges and a faint, fine surface sculpture that follows the incremental growth lines. There are 11 prominent spiral ridges on the body whorl n, grouped as: six basal, two peripheral, and three superior revolving ridges. The largest of the basal spirals is the outermost one, which is separated from others by wide channels.

The aperture in the adult shell shows only a slight reflection of the margin and almost no varix. The margin is machicolated (notched) by the squared ends of the strong spiral ridges. The umbilicus is small, rounded at the base's entrance. Internally, the umbilicus contains a single, rounded spiral ridge, but is devoid of spines or nodules.

The shell is whitish, often covered entirely or in patches by a dull, livid red. The operculum is horny. ^[3]

Distribution

Arene bairdii can be found from the Southeast USA to South Brazil. ^[2]

References

1. Arene bairdii (Dall, 1889) . Retrieved through: World Register of Marine Species  on 19 April 2010.
2. "Arene bairdii". gastropods.com. Retrieved 13 May 2020.
3. Dall, W.H. (1889). "Reports on the results of dredging, under the supervision of Alexander Agassiz, in the Gulf of Mexico (1877-78) and in the Caribbean Sea (1879-80), by the U.S. Coast Survey Steamer "Blake", Lieut.-Commander C.D. Sigsbee, U.S.N., and Commander J.R. Bartlett, U.S.N., commanding. XXIX. Report on the Mollusca. Part 2, Gastropoda and Scaphopoda". Bulletin of the Museum of Comparative Zoölogy at Harvard College. 18: 389. Retrieved 14 October 2025. This article incorporates text from this source, which is in the public domain .

• Rosenberg, G.; Moretzsohn, F.; García, E. F. (2009). Gastropoda (Mollusca) of the Gulf of Mexico, Pp. 579–699 in: Felder, D.L. and D.K. Camp (eds.), Gulf of Mexico–Origins, Waters, and Biota. Texas A&M Press, College Station, Texas.