WoRMS taxon details
Trituba additicia Gofas, 2003
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|Parent|| ||Trituba Jousseaume, 1884|
original description: Gofas S. (2003). An endemic radiation of Trituba (Mollusca, Gastropoda) on the North Atlantic seamounts. American Malacological Bulletin 17(1-2): 45-63 [issued march 2003]|
page(s): 56-57 [details]
basis of record: Check List of European Marine Mollusca (look up in IMIS) [details]
|Links|| ||To CLEMAM|
To Encyclopedia of Life
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.
Distribution: Hyères and Irving seamounts, uncommon in 275-310 m, endemic [details]
Habitat: Known from seamounts and knolls [details]
Type locality: Hyères seamount, 31°30.0'N - 28°59.5'W, 310 m. [details]
Trituba additicia Gofas, 2003
Holotype (shell) from Hyères seamount, 31°30.0'N - 28°59.5'W, 310 m, 'Seamount 2' DW188 (actual size 4.0 mm). Scale bar for protoconch 500 µm.
added on 2010-06-18 - author: Gofas, Serge
qualitystatus: checked by Gofas, Serge on 2010-06-18 23:01:37
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| || ||Citation: Gofas, S. (2013). Trituba additicia Gofas, 2003. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=180938 on 2013-05-21|
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