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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): 56-57 [details] Available for editors 
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 4 x 1.1 mm, turriculate, solid, white, with 10-13 whorls. Protoconch of nearly 3 whorls, with the nucleus quite protruding and the whorls regularly increasing in diameter; protoconch whorls very convex, sculptured with strong, thick ribs, almost axial on the first and second whorl, more oblique on the third whorl. (max. diametre of protoconch 0.6 mm).
Teleoconch whorls sculptured with strong subsutural and suprasutural knobs, arranged in two spiral rows which are offset from each other and connected by faint oblique ridges; both series of knobs starting simultaneously on the first teleoconch whorl, the subsutural one prominent so as to form a channelled suture. Body whorl hardly narrowing; with the abapical surface smooth and circled by a sharp, slightly undulated keel; the subsutural row of knobs abutting against the anal canal, the other one running next to the abapical keel.
Aperture with a continuous, strongly flaring peristome. Siphonal canal moderately long, narrowing towards outer opening, inside with columellar and labial lamellae quite far apart. Anal canal similar in size and shape to the siphonal, moderately curved backwards.
The sculpture in this species recalls that of T. aspera from Atlantis seamount, but the canals are much longer and the protoconch has one more whorl.
[details]
Distribution Hyères and Irving seamounts, uncommon in 275-310 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]
From editor or global species database
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