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Taxon profile

species

Clavus sulekile (Kilburn, 1988)

kingdom Animalia - animals »  phylum Mollusca - mollusks »  class Gastropoda - gastropods »  order Neogastropoda »  family Drilliidae »  genus Clavus

Scientific synonyms

Tylotiella sulekile R.N. Kilburn, 1988

Images

Clavus sulekile

Author: Jan Delsing

Clavus sulekile

Author: Kilburn, R.N.

Clavus sulekile

Author: Shellauction

Taxon in country check-lists*

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Description

Diagnosis: Shell narrowly claviform (b/l 0,39-0,41, a/l 0,36), apex not blunt, base moderately long, slanting slightly to right; suture weakly or not undulating; whorls fairly strongly convex, with at most a very feeble shoulder, no subsutural cord or sulcus; fasciole present; siphonal canal relatively short and wide, labrum medially slightly flattened, columella slightly convex; parietal nodule very small, not constricting anal sinus, which is deep and asymmetrical, its lower border weakly alate, stromboid notch slight; axial ribs low, narrower than intervals, opisthocline, reaching suture below and more or less extending to suture above. 15-18 on penultimate whorl; spiral threads thin and low, developing only on later whorls (5 on penultimate whorl), becoming coarse and declivous on rostrum; body whorl with rib-like prelabral varix; glossy, uniform white or brownish-buff. Protoconch bluntly conical, breadth 0,88-0,90 mm. Attains 9,8 mm.
Description: Shell moderately small, narrowly claviform (b/1 0,39-0,41, a/1 0,36), apex not blunt, rostrum moderately long, base slanting slightly to right, squarely truncate; teleoconch whorls slightly over 5, suture shallow, weakly or not undulating; whorls fairly strongly convex, with at most a very slight shoulder, periphery at about mid-whorl, shoulder slope feebly to distinctly concave, no trace of subsutural cord; left side of base of body whorl shallowly concave, fasciole weak to moderate, no false umbilicus. Aperture oblong, greatest width at about posterior third, tapering gradually to siphonal canal, labrum medially slightly flattened, columella slightly convex, parietal region concave, siphonal canal moderately short, broad, fairly deep, oblique and slightly tapering, termination not indented; labial callus moderately thin, edge not free on columella, parietal nodule weak, forming a barely elevated pad, which does not constrict opening of anal sinus; labrum moderately convex in side-view, stromboid notch feeble, anal sinus deep, openly and somewhat asymmetrically U-shaped, opening directed outward, its lower border weakly alate.
Sculptured by rather low axial ribs, crossed by weak, well-spaced spiral lirae, becoming coarse and declivous on rostrum; growth-lines fine; body whorl with a varix behind lip. Axial ribs weakening on shoulder slope, on body whorl extending to about columella/parietal junction, opisthocline, weakly reversed-sigmoid, narrower than intervals, crests angular to sharply rounded, sides gradually sloping; 1st whorl with 11 ribs, penultimate whorl with 15-18. Spiral lirae not apparent on early whorls, elsewhere narrow and barely raised, absent on shoulder slope, about 5 on penultimate whorl, 13-16 on base of body whorl. Glossy, colour uniform light yellowish-brown to yellowish-white. Protoconch bluntly conical, of about 2 whorls, 1st one small and depressed; evidently smooth, except for axial riblets near termination, lip weakly reversed-sigmoid; breadth 0,88-0.90 mm, height 0,85-0.88 mm (b/h 1.00-1.06). Dimensions: 8,7 x 3,4 mm (holotype), 9,8 x 4,0 mm (paratype).
Kilburn, R.N., 1988. Turridae (Mollusca: Gastropoda) of southern Africa and Mozambique. Part 4. Subfamilies Drillinae, Crassispirinae and Strictispirinae

Interchangeable taxa

The Mozambican paratype differs from the holotype in its brownish-buff colouration, more concave shoulder slope and slight indication of a shoulder, but is certainly conspecific.
Kilburn, R.N., 1988. Turridae (Mollusca: Gastropoda) of southern Africa and Mozambique. Part 4. Subfamilies Drillinae, Crassispirinae and Strictispirinae

Distribution

Continental shelf of southern Mozambique and Natal (South-Africa)
Kilburn, R.N., 1988. Turridae (Mollusca: Gastropoda) of southern Africa and Mozambique. Part 4. Subfamilies Drillinae, Crassispirinae and Strictispirinae
Author: Jan Delsing

Links and literature

EN Galli C.: WMSDB - Wolrdwide Mollusc Species Data Base July 10, 2013 [http://www.bagniliggia.it/WMSD/WMSDhome....] [as Tylotiella sulekile Kilburn, 1988]
Data retrieved on: 22 November 2013

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