Inkinga carnosa Kilburn, 2005

Kilburn, Richard N., 2005, New species of Drilliidae and Turridae from southern Africa (Mollusca: Gastropoda: Conoidea), African Invertebrates 46, pp. 85-92 : 86-87

Inkinga carnosa Kilburn , sp. n.

Figs 1, 2

Etymology: L. carnosus (flesh-like). In reference to colour.

Description: Shell claviform, b/l 0.34–0.35, base short, obliquely truncate, very slightly indented, aperture 0.35–0.37 of total length, apex blunt. Outer lip thin, somewhat alate, in side view strongly convex, not preceded by a varix; anal sinus openly U-shaped, directed slightly adapically, occupying entire subsutural slope with its apex slightly above periphery; columella twisted, edge flattened with a thick callus, its edge free; no parietal pad. Whorls concave below suture, anteriorly convex with weakly angular periphery, situated below median on early whorls, above median on later ones, forming

1 2

a slight shoulder on last whorl; suture distinct, notch-like on early whorls; no subsutural cord, but slightly raised at suture.

Sculpture weak, spiral threads dominant on later whorls, axial riblets on early ones. Axial riblets on early whorls strongly sigmoid, fairly sharply incised, close and angular in transverse section, suture to suture, approx. 14 on first teleoconch whorl, 18 on second, barely raised on penultimate whorl, more or less obsolete on last whorl. Spiral threads 7–9 on first whorl, 16–18 on penultimate whorl, narrower than their intervals; base of body whorl with 15–16 threads, obsolete on end of rostrum.

Protoconch papilliform, of 2 whorls, with depressed, rounded protoconch I, smooth except for last quarter-whorl, which has weak, slightly sinuous, opisthocline riblets, termination distinct, strongly sigmoid; breadth 1.05 mm.

Entire shell uniform flesh-colour.

Dimensions: 13.8 x 4.7 mm, aperture 4.8 mm (holotype); 14.3 x 5.0 mm, aperture 5.3 mm (largest paratype).

Comparison: In addition to the distinguishing characters given in the key above, Inkinga platystoma (E.A. Smith, 1877) differs from I. carnosa in its narrower anal sinus, and narrower, more obliquely truncate base, and Inkinga cockae (Kilburn, 1977) is smoother, more subcylindrical in shape and usually narrower.

Holotype: NMSA W2716 /T2022 (donated by B. Hayes). SOUTH AFRICA: Agulhas Bank, off Cape St Francis (approx. 34°13'S: 24°50'E), 150 m, trawled.

Paratypes: Three specimens from type locality in B. Hayes collection.

Figures

Figs 1, 2. Inkinga carnosa sp. n., holotype NMSA W2716/T2022; off Cape St Francis, Agulhas Bank, 150 m; 13.8 x 4.7 mm: (1) aperture view, (2) lateral view.