Tegula excavata

Tegula excavata, common name the green-based tegula, is a species of sea snail, a marine gastropod mollusk in the family Tegulidae.[1]

Tegula excavata
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Clade: Vetigastropoda
Order: Trochida
Superfamily: Trochoidea
Family: Tegulidae
Genus: Tegula
Species:
T. excavata
Binomial name
Tegula excavata
(Lamarck, 1822)
Synonyms
  • Agathistoma excavata Lamarck, 1822
  • Chlorostoma excavata Lamarck, 1822
  • Chlorostoma excavatum Lamarck, 1822
  • Neomphalius excavata Lamarck, 1822
  • Omphalius excavata Lamarck, 1822
  • Trochus cinerea Costa, E.M. da, 1778
  • Trochus cinereus da Costa, 1778
  • Trochus excavatus Lamarck, 1822 (original description)

Description

The height of the shell varies between 12 mm and 18 mm. The umbilicate shell has a conical shape. It is dull grayish, olivaceous or pinkish, longitudinally lineolate with a darker shade, frequently appearing unicolored. The spire is conic. The apex is eroded or acute. The 6 to 7 whorls are flattened, scarcely convex, very obsoletely spirally grooved. The body whorl is acutely carinated at the periphery, flat or plano-concave beneath, concentrically lirate. The large aperture is subhorizontal, iridescent within. The columella is sinuous, unidentate in the middle, green, half surrounding the umbilicus with a sickle-shaped callus. The umbilicus is funnel-shaped, green or white within, broadly expanding at its opening.[2]

Three views of a shell of Tegula excavata

Distribution

This species occurs in the Gulf of Mexico, the Caribbean Sea and the Lesser Antilles.

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References
  1. Tegula excavata (Lamarck, 1822). Retrieved through: World Register of Marine Species on 20 April 2010.
  2. Tryon (1889), Manual of Conchology XI, Academy of Natural Sciences, Philadelphia (described as Chlorostoma excavatum)
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