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MarBEF Data System |
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WoRMS taxon details
original description
Gofas, S. (2003). An endemic radiation of <i>Trituba</i> (Mollusca, Gastropoda) on the North Atlantic seamounts. <em>American Malacological Bulletin.</em> 17(1-2): 45-63.
page(s): 51-53 [details] Available for editors  [request]
context source (Deepsea)
Intergovernmental Oceanographic Commission (IOC) of UNESCO. The Ocean Biogeographic Information System (OBIS), available online at http://www.iobis.org/ [details]
basis of record
Check List of European Marine Mollusca (CLEMAM). , available online at http://www.somali.asso.fr/clemam/index.clemam.html [details]
 Present Present in aphia/obis/gbif/idigbio Inaccurate Introduced: alien Containing type locality
From editor or global species database
Biology The type of larval development is not known from direct evidence, but is inferred to be intracapsular from similarity of the larval whorls with those of Cerithiella (see Bouchet and Warén, 1993). There is a multispiral protoconch, but no clear separation protoconch 1/protoconch 2 nor protoconch 2/teleoconch. [details]
Diagnosis Shell up to 19 x 3.2 mm, turriculate, solid, white, with 20-22 whorls. Protoconch ca. 3-3.5 whorls, with maximum diameter 0.7 mm, the nucleus quite protruding; first protoconch whorl with maximum convexity along suprasutural zone; the second whorl convex, with the suprasutural portion slightly overhanging the following whorl; first protoconch whorl nearly smooth, the following sculptured with weak folds, nearly axial on the first whorl, more oblique on the second and third whorls.
Teleoconch whorls with a glossy surface, sculptured with slightly oblique ribs on which there are two variably developed bulges separated by a depression; the suprasutural bulges bordered adapically by a faint spiral line. Body whorl definitely constricted, with axial sculpture gradually becoming attenuated or disappearing; its abapical surface smooth and circled by a strong keel on which the ribs, if any, terminate. On some specimens, the abapical row of bulges continued on the body whorl as a faint additional keel. Aperture with a continuous, flaring peristome. Siphonal canal very short, narrowing towards outer opening, inside with columellar and labial lamellae coming moderately close. Anal canal small and short, pointing sidewards.
This is one of the largest species on the seamounts, easily recognized by its very short canals, attenuated sculpture and narrowing body whorl. The protoconch with delicate sculpture is similar to those of T. incredita Gofas, 2003, T. recurvata Gofas, 2003 and T. lima Gofas, 2003.
[details]
Distribution Hyères and Irving seamounts, common in 310-845 m; endemic. [details]
Type locality Hyères seamount, 31°30.0'N - 28°59.5'W, 310 m. [details]
Type locality Hyères seamount (31°30.0'N - 28°59.5'W, 310 m) [details]Unreviewed
Habitat Known from seamounts and knolls [details]
From editor or global species database
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