Entemnotrochus adansonianus

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Entemnotrochus adansonianus
Entemnotrochus adansonianus 001.png
Drawing of a shell of Entemnotrochus adansonianus
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Vetigastropoda
Order: Pleurotomariida
Family: Pleurotomariidae
Genus: Entemnotrochus
Species:
E. adansonianus
Binomial name
Entemnotrochus adansonianus
(Crosse & Fischer, 1861) [1]
Synonyms [2]

Entemnotrochus adansonianus, common name Adanson's slit shell, is a species of sea snail, a marine gastropod mollusk in the family Pleurotomariidae. [2]

Contents

Subspecies

Description

Shell in Endo Shell Museum Entemnotrochus adansonianus.jpg
Shell in Endo Shell Museum

The length of the shell varies between 80 mm and 190 mm. This attractive species has a pale yellowish-fleshy color with numerous, irregular, reddish spots, sometimes vivid, sometimes more or less effaced. The shell has a trochiform shape above, but is plano-convex beneath and concave in the middle. It is concentrically costate-sulcate with granulose ribs. It has many longitudinal wrinkles. The acuminate apex is smooth and yellowish. The 11 whorls increase slowly and are rather planulate at the sutures. The shell is unequally divided by the slit fasciole. Below it is traversed by 7 to 8 spiral granose ribs, above it with longitudinal, oblique, rather separated striae and two spiral, slightly marked series of granules; The body whorl is obtusely bicarinate. The slit fascicle has a semicircular, delicate, impressed stride. It has a round and very deep, pervious umbilicus. The species has a (thin yellow in juvenile examples) operculum that completely seals the subquadrate aperture. The shell is pearly within. [3]

Distribution

Entemnotrochus adansonianus is endemic to the West Indies and Caribbean region. [4] A very few of these rare slit shells that reside at depths between 150 and 240 metres have been dredged and (crabbed examples) trapped. [5] This species also occurs on the Mid-Atlantic Ridge.

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References

  1. ↑ (Crosse & P. Fischer, Journ. de Conchyl. ix, p. 163, t. 5, f. 1, 2, 1861.
  2. 1 2 Entemnotrochus adansonianus (Crosse & P. Fischer, 1861) . Retrieved through: World Register of Marine Species  on 11 April 2010.
  3. ↑ G.W. Tryon (1890), Manual of Conchology vol. XII (described as Pleurotomaria adansonianus)
  4. ↑ Oliver, A.P.H. (2004). Guide to Seashells of the World. Buffalo: Firefly Books. 17.
  5. ↑ RoseSmyth, MC. "Deep reef research with a submersible: Living pleurotomarian slit-shells". In: Mitchell, CT (Ed). Diving for Science…1985. Proceedings of the Joint American Academy of Underwater Sciences and Confederation Mondiale des Activités Subaquatiques annual scientific diving symposium 31 October – 3 November 1985 la Jolla, California, USA. Archived from the original on 15 April 2013. Retrieved 7 March 2013.{{cite journal}}: CS1 maint: unfit URL (link)
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