Alaba incerta is a species of sea snail, a marine gastropod mollusk in the family Litiopidae.
Description (Described as Rissoa melanura) The shell is conic and turrited. It is white and subtransparent with a black apex. It is nearly smooth and is shining. It features some spiral striae that are distinct anteriorly and on the lower part of the whorls of the spire, but obsolete on the upper part. The apex is acute, and the spire has nearly rectilinear outlines. There are eight quite convex whorls with a rather deep suture. The aperture is scarcely effuse, and the outer lip is thin and well-excurved below the middle. The columella is straight and subtruncate.
Distribution This species occurs in the Caribbean Sea and off the Lesser Antilles.
Description The maximum recorded shell length is 10 mm.Welch J. J. (2010). "The "Island Rule" and Deep-Sea Gastropods: Re-Examining the Evidence". PLOS One 5(1): e8776. .
Habitat Minimum recorded depth is 0 m. Maximum recorded depth is 40 m.
References
Rosenberg, G., F. Moretzsohn, and E. F. García. 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. Biodiversity. Texas A&M Press, College Station, Texas.
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