Agathistoma fasciatum

Agathistoma fasciatum (known commonly as the Smooth Atlantic Tegula) is a species of sea snail, a marine gastropod mollusk in the family Tegulidae.[2]

Agathistoma fasciatum
Drawing with four views of a shell of Agathistoma fasciatum
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Vetigastropoda
Order: Trochida
Superfamily: Trochoidea
Family: Tegulidae
Genus: Agathistoma
Species:
A. fasciatum
Binomial name
Agathistoma fasciatum
(Born, 1778) [1]
Synonyms
  • Adeorbis pictus Tenison Woods, 1877
  • Chlorostoma fasciata Born, 1778
  • Trochus carneolus Lamarck, 1822
  • Tegula fasciata (Born, 1778) ·
  • Trochus fasciatus Born, 1778
  • Trochus occultus Philippi, 1845
  • Turbo dentatus Gmelin, 1791

Description

A. fasciatum is slightly smaller than T. lividomaculata, which is 5⁄8 to 7⁄8 in (16 to 22 mm) high, and somewhat wider than that.[3] Its thick, solid shell is depressed and is umbilicate. The six whorls are smooth, convex and rounded. The apex is acute. The upper whorls are nearly flat, the last flattened beneath the suture. The base of the shell is rounded, concave around the umbilicus. The aperture is oblique. The outer lip is finely crenulated within. The columella is short, arcuate, with a white callus above and two transverse tubercles at its base. The color of the shell is reddish or pale tan to dark brown, usually with irregular, axially distributed splotches of white, and fine spiral lines of alternating reddish and white spots or streaks. A pale band is often present at the periphery of the last whorl.[3][4]

Distribution

A. fasciatum often lives under rocks at low tide level, and is abundantly found throughout southern Florida, the Caribbean Sea and the West Indies (Atlantic Ocean)[3] at depths between 0 m and 90 m.

References
  1. Born, I. 1778. Index Rerum Naturalium Musei Caesarei Vindobonensis. Pars I. Testacea. [xlii] + 458 + [82] pp., 1 pl. Offficina Krausiana: Wien
  2. Tegula fasciata (Born, 1778). Retrieved through: World Register of Marine Species on 20 April 2010.
  3. Rehder, Harald A (1981). National Audubon Society Field Guide to North American Seashells. New York: Alfred A. Knopf. p. 384. ISBN 0-394-51913-2.
  4. Tryon (1889), Manual of Conchology XI, Academy of Natural Sciences, Philadelphia (described as Chlorostoma fasciatus)
  • Gmelin, J. F. 1791. Systema naturae per regna tria naturae. Editio decima tertia. Systema Naturae, 13th ed., vol. 1(6): 3021-3910. Lipsiae
  • Lamarck, [J. B.] 1822. Histoire naturelle des animaux sans vertèbres. Histoire Naturelle des Animaux sans Vertèbres 7: [iii] + 711 pp. Author: Paris.
  • Philippi, R. A. 1845. Trochus. Abbildungen und Beschreibungen neuer oder wenig gekannter Conchylien 2(1-2): 13-18, 35-40, pl. 6-7
  • Adams, C. B. 1850. Monograph of Vitrinella, a New Genus of New Species of Turbinidae. 10 pp. Author: Amherst, Massachusetts.
  • 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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