Tritia grana

Tritia grana is a species of sea snail, a marine gastropod mollusk in the family Nassariidae, the Nassa mud snails or dog whelks.[2]

Tritia grana
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Gastropoda
(unranked):
clade Caenogastropoda
clade Hypsogastropoda
clade Neogastropoda
Superfamily:
Buccinoidea
Family:
Nassariidae
Subfamily:
Nassariinae
Genus:
Tritia
Species:
T. grana
Binomial name
Tritia grana
(Lamarck, 1822) [1]
Synonyms[2]
  • Buccinum grana Lamarck, 1822
* Buccinum granum Lamarck, 1822 (basionym)
  • Nassa graniformis Locard, 1886
  • Nassa granum (Lamarck, 1822)
  • Nassa granum var. elongata Pallary, 1900
  • Nassa granum var. lutea Pallary, 1920
  • Nassa granum var. varicosa Pallary, 1900
  • Nassarius (Naytiopsis) granum (Lamarck, 1822)
  • Nassarius granum (Lamarck, 1822)
  • Naytiopsis granum (Lamarck, 1822)
  • Planaxis laevigata Risso, 1826

Spelling

The specific name was originally introduced in the binomen Buccinum grana, translated in French as "buccin graine". This has been emended to granum by Kiener (1834: 22) and most subsequent authors, presumably considering that the correct Latin word for "graine" ("seed") is granum. Therefore, the spelling granum must be conserved in application of ICZN art. 33.2.3.1. "when an unjustified emendation is in prevailing usage and is attributed to the original author and date it is deemed to be a justified emendation".[2]

Description

The shell size varies between 10 mm and 14 mm

The small shell is ovate, pretty thick, reddish, smooth and shining. It is surrounded with interrupted, small, brown lines, more approximate towards the middle of the lowest whorl, and of a deeper color at the base. The spire is elongated, pointed. It is composed of seven slightly convex whorls, surrounded at their upper part by a white band, sprinkled with distant, brown points or spots. The aperture is white. The internal edge of the outer lip is crenulated, the external part forming a smooth, thick callus, of a dull white, which is continued upon the base of the shell even to the columella, which is arcuated and folded at its base.[3]

Distribution

This species occurs in the Mediterranean Sea and in the Atlantic Ocean off Senegal.

References
  1. Lamarck ([J.-B. M.] de), 1815–1822: Histoire naturelle des animaux sans vertèbres Paris [vol. 5: Paris, Deterville/Verdière] [vol. 6 published by the Author]
  2. Marshall, B. (2016). Tritia grana (Lamarck, 1822). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=876837 on 2016-05-18
  3. Kiener (1840). General species and iconography of recent shells : comprising the Massena Museum, the collection of Lamarck, the collection of the Museum of Natural History, and the recent discoveries of travellers; Boston :W.D. Ticknor,1837
  • Cernohorsky W. O. (1984). Systematics of the family Nassariidae (Mollusca: Gastropoda). Bulletin of the Auckland Institute and Museum 14: 1–356
  • Gofas, S.; Le Renard, J.; Bouchet, P. (2001). Mollusca, in: Costello, M.J. et al. (Ed.) (2001). European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Collection Patrimoines Naturels, 50: pp. 180–213
  • "Nassarius (Naytiopsis) granum". Gastropods.com. Retrieved 20 February 2011.
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