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MarBEF Data System |
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WoRMS taxon details
Nomenclatureoriginal description
Gofas, S. (2003). An endemic radiation of Trituba (Mollusca, Gastropoda) on the North Atlantic seamounts. American Malacological Bulletin. 17(1-2): 45-63.
page(s): 53-54 [details] Available for editors  [request]
Othercontext source (Deepsea)
Intergovernmental Oceanographic Commission (IOC) of UNESCO. The Ocean Biogeographic Information System (OBIS), available online at http://www.iobis.org/ [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 12.2 x 2.4 mm, turriculate, solid, white, with 14-20 whorls. Protoconch ca. 2.5-3 whorls, with maximum diameter 0.7 mm; the nucleus quite protruding and the whorls regularly increasing in diameter; protoconch whorls convex, sculptured with strong, thick ribs, almost axial on the first and whorl, then more oblique.
Teleoconch whorls with a glossy surface, sculptured with quite strong, oblique ribs, swollen towards their subsutural and suprasutural parts, and depressed in between; the subsutural end with definite knobs in the early whorls, less so in the later ones; the suprasutural knobs distinct throughout and bordered adapically by a definite spiral line. Body whorl not narrowing; its abapical surface smooth and circled by a strong keel on which the ribs terminate.
Aperture with a continuous, moderately flaring peristome. Siphonal canal short, hardly narrowing towards outer opening, inside with columellar and labial lamellae coming very close together. Anal canal short, pointing sidewards.
Trituba fallax most resembles a large T. anelpistos Gofas, 2003 in the general pattern of sculpture of the protoconch and teleoconch. However, it grows still larger (usually over 10 mm) and has more whorls than T. anelpistos, the protoconch is accordingly broader and has more widely spaced ribs, particularly on the first whorl. Trituba constricta Gofas, 2003 differs in that the protoconch has a delicate sculpture, the body whorl is constricted and the axial ribs, if well developed, have more distinct bulges.
[details]
Distribution Hyères and Irving seamounts, moderately common in 270 to 750 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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