Turris kathiewayae, Kilburn & Fedosov & Olivera, 2012

Kilburn, Richard N., Fedosov, Alexander E. & Olivera, Baldomero M., 2012, Revision of the genus Turris Batsch, 1789 (Gastropoda: Conoidea: Turridae) with the description of six new species, Zootaxa 3244 (1), pp. 1-58 : 35-37

Turris kathiewayae sp. nov.

Plate 21 , figs A–G

Turris annulata (non Reeve, 1843); (in part) Powell 1964: 333, pl. 181, fig. 19; Olivera 2000: 310, pl. 1, specimen 9, pl. 10 (left);? Kosuge 1988: 101, pl. 41, fig. 2; Li & Li 2007: 65 , pl. 1, fig. 4; Olivera & Sysoev 2008: pl. 680, fig. 10; Robin 2008: pl. 448, fig. 1.

Annulaturris annulata ; Vera-Peláez et al. 2000: pl. 2, fig. 9 (anal sinus), pl. 3, fig. 1 (protoconch), pl. 7, figs 5–7.

Turris (Annulaturris) annulata ; Hasegawa et al. 2000: 633, pl. 315, fig. 66.

DESCRIPTION: Spire angle 25–28º, b/l 0.27-0.30, a/l 0.41–0.49, with an acuminate, orthoconoid spire, siphonal canal straight, moderately thick but tapering, is approximately equal to the aperture; whorls with periphery more or less median, suture channelled; teleoconch whorls ca 16 (apex more or less worn in all seen). Anal sinus shallow, tongue-shaped, parallel-sided, bordered by a raised flange; interior of aperture with 4–7 well-spaced spiral ridges. Sculptured by strong spiral cords with narrow intervals, containing collabral threads. Subsutural cord well-defined, consisting of two irregularly and weakly crenulate ridges, the posterior one slightly weaker but forming a flange bordering suture, sometimes a third ridge above sulcus. Sulcus deep and narrow. Sinus cord peripheral, slopingly flat-topped and concave to very shallowly bifid, often no wider than other cords, irregularly crenulated by shallow lunulate grooves. Base of spire whorls with two main cords, each unequally and deeply bifid, forming a thin accessory cord on its anterior margin; a 3rd main cord sometimes just visible above suture; intervals between main cords deep, much narrower than cords. Base of last whorl with 18–20 strong, irregularly nodose spiral cords, posteriorly with some interstitial ridges, a variable development of microscopic threads in intervals and on sides of cords; ridges on rostrum finer, closer and more even, becoming obsolete near end, rendered rugose by collabral threads. Collabral threads thin but strong, forming oblique lamellae in sulcus. Traces of pale periostracum in interstices between spiral cords.

White with some light brown blotches or flecks, particularly below suture, or pale buff with white cords, anal cord sometimes marked with arcuate brown lines (creating a gemmulate appearance); rostrum and aperture white. Protoconch (photomicrograph courtesy of B. Olivera) bluntly conical, ca 3 whorls, the last with arcuate, suture-tosuture axial riblets; breadth ca 0.76 mm.

Attains 61 mm.

DISTRIBUTION: Philippines to southern Japan, China, Tonga and New Caledonia, 25– 320 m.

TYPE LOCALITY: Aliguay Is., Zamboanga, Northern Mindanao, PHILIPPINES

TYPES: Holotype (Pl. 21, Figs. A-B), Aliguay Is. (8º45’N; 123º14’E), Zamboanga Province, Northern Mindanao, PHILIPPINES, 25–40 m, MNHN 24946 , dimensions 59.0 x 16.8 mm ; Paratype 1 (Pl. 21, Figs. C-D) same locality, 25–40 fath. [44–73 m], 55.0 x 16.3 mm ( ANSP 426055); Paratype 2, TERRASSES, Stn. DW3120 (22°44’S, 167°12’E), 320 m, NEW CALEDONIA, 53.7 x 15.4 mm (IM-2009-13559); Paratypes 3-9, Aliguay Is., off Dapitan, Zamboanga Province, Philippines, 46–73 m (2 paratypes NHMUK 20110302, 4 paratypes NMSA L8206/T2588). JAPAN: Off Tosa, 100 fath. [183 m], NMSA J3682/T2589, 2 paratypes, don. M. Azuma; off Okino-Tori Island, Japan (20º25’N; 136º00’E), trawled ( NMSA L8305/T2587: Shingo Habu).

OTHER MATERIAL EXAMINED: PHILIPPINES: off Bohol Is., Philippines (9º50’N; 124º10’E) ( NMSA K2117: R. Martin). NEW CALEDONIA: 20°54.15’S, 167°01.7’E, 120–250 m ( MNHN); Noumea, 350–450 m (BO colln); TONGA: 21°17’S, 175°00’E, 350–355 m ( MNHN), 18°37’S, 174°03’E, 320-360 m ( MNHN)

REMARKS: Although this taxon has been regarded as merely a “white deep-water form” of T. annulata ( Reeve, 1843) , the two may be distinguished as follows:

Turris annulata : Suture shallow; spiral cords low and roundly angular, with narrow, very shallow intervals; subsutural cord very low, with 3–4 low, wide-set ridges; sinus cord not crenulated. Colour uniform reddish-brown with a persistent brown periostracum overall.

Turris kathiewayae : Suture shallowly channelled; spiral cords high, with deep, relatively wide intervals, most main cords compound (with 1–2 weaker ridges cut off on the anterior face); subsutural cord prominent, bearing 2–3 strong ridges; sinus cord usually irregularly crenulated by very shallow lunulate grooves. Colour off-white, to pale brown with diffuse pale brown marks, crests of ridges with brown spiral lines; periostracum interstitial.

A specimen from Noumea differs from all others seen in colouration, which is light brown with a white sinus cord; there are also minor sculptural differences. The significance of these differences is unknown.

ETYMOLOGY: Named in honour of Ms Kathie Way of the NHMUK, for her valuable assistance and advice.

Figures

PLATE 21. Turris kathiewayae nsp.: A, B—Holotype, 51.1 x 14.0 mm, Aliguay Is., Mindanao, Philippines, MNHN 24946; C, D—Paratype 1, 55.0 x 16.3 mm, Aliguay Is, Mindanao, Philippines, 44–73 m, ANSP 426055; E, F—55.0 x 16.3mm, New Caledonia, 350–450 m, BO colln;