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MarBEF Data System |
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ERMS 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): 55-56 [details] Available for editors 
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 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 13.2 x 2.5 mm, turriculate, solid, white, with 15-20 whorls.Protoconch ca. 3-31/2 whorls, the nucleus moderately protruding, with a somewhat pupoid profile, inflated so as to depart slightly from the general spire profile; protoconch whorls moderately convex, less so along the subsutural portion, sculptured with delicate, irregular, oblique and flexuous ribs.
Teleoconch whorls sculptured with strong subsutural and suprasutural knobs, arranged in two spiral rows which are offset from each other so as to form loosely defined, oblique axial ribs; the suprasutural knobs starting earlier on the first teleoconch whorl and bordered adapically by a definite spiral line. Body whorl hardly narrowing; with the spiral rows of knobs becoming gradually fused and then disappearing; abapical surface smooth and circled by a faint keel.
Aperture with a continuous, flaring peristome. Siphonal canal moderately long, slightly narrowing towards its opening, inside with columellar and labial lamellae quite close together. Anal canal very long and curved backwards, making a wide angle with apertural plane.
T. incredita Gofas, 2003, from Great Meteor seamount, differs essentially in having a rather short anal canal. The delicate protoconch sculpture is also found in the sympatric T. constricta Gofas, 2003, which differs by its larger size, teleoconch sculpture smoother and more predominantly axial, narrowing body whorl and very short canals.
[details]
Distribution Hyères seamount, uncommon in 705-1060 m, endmic. [details]
Type locality Hyères seamount, 31°09.5'N - 28°43.5'W, 845m. [details]
Type locality Hyères seamount (31°09.5'N - 28°43.5'W, 845m) [details]
From editor or global species database
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