Turris brevicanalis, , Kuroda, Oyama, 1971

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 : 12-14

Turris brevicanalis (Kuroda & Oyama in Kuroda et al. 1971)

Plate 6 , figs A–H

Annulaturris brevicanalis Kuroda & Oyama in Kuroda et al., 1971: 224, pl. 57, fig. 5. Type loc.: Sagami Bay, Japan.

Turris (Annulaturris) brevicanalis ; Hasegawa et al. 2000: 633, pl. 315, fig. 65.

Turris brevicanalis ; Higo et al. 2001: 101 (fig. of holotype).

Turris (Annulaturris) brevicanalis ; Higo et al. 1999: 304;

Not: Annulaturris brevicanalis ; Vera-Peláez et al. 2000: pl. 7, fig. 4.

DESCRIPTION: Shell thick, fusiform, b/l 0.27–0.38, a/l 0.37–0.40, whorls gently convex, siphonal canal distinctly recurved, usually equal in length to rest of aperture, sometimes shorter; columella callus thick, with distinct edge, fasciole sometimes with a slight false umbilicus. Outer lip convex, drawn in at base of siphonal canal, but not forming a distinct stromboid notch, edge of lip crenate; anal sinus moderately shallow, linguiform, with a raised border.

Spiral cords slightly angularly rounded, but crests flattened, sometimes steep-sided, except on base; suture forming a deep but narrow notch. First whorl with two granulate spiral ridges, following whorls with 3 thin spiral ridges per whorl, with a 4th one developing above suture. Subsutural cord bearing three spiral ridges, the median one strong, the others weak, crossed by dense axial lamellae, crenulating sulcus, which is deep and narrow. Sinus cord projecting, forming a narrowly tabulate shoulder, more or less wider than sulcus, shallowly bifid, feebly crenulate. flanked by fine, converging, oblique lamellae; base of whorl with 3 slightly angularly rounded spiral cords, plus several spiral threads above suture, the peripheral cord not protruding beyond sinus cord or only slightly so; intervals are filled with dense spiral threads. Upper part of base with 5–6 weakly convex spiral cords, rostrum with 12–16 fine, dense, rough threads. Collabral threads weak to strong, crispate, forming thin lamellae in intervals, coarsest below suture and on rostrum.

Colour dull white, spiral cords with rounded reddish-brown spots or short bars, becoming paler behind lip and on base.

Protoconch bluntly conical, of slightly over 3 convex whorls, with feeble axial ribs, except on last whorl which bears 10 relatively strong, opisthocyrt axial ribs; breadth 1.03 mm.

Dimensions (largest examples seen): 89.4 x 25.4 mm; 86.6 x 24.4 mm; 85.2 x 24.3 mm.

TYPES: A. brevicanalis : holotype NSMT–MoR 0 6103 in Showa Memorial Institute (f. Kikuchi et al. 1997: 25) .

OTHER MATERIAL EXAMINED: JAPAN: off Jyogashima Is., Kanagawa Prefecture, Honshu (NSMT-Mo 77202: Sakurai colln); Sagami, Kanagawa Prefecture (NSMT-MoR 18913: Showa Memorial Institute); off Kii, Wakayama Prefecture, (NSMT-Mo 77199: Kawamura colln); off Wakayama Prefecture (NMST-Mo 77201: Sakurai colln); Tanabe Bay, off Sakaihama in Minabe-cho, Tanabe-gun, Wakayama Prefecture ( ANSP 420818: Hideo Katori); off Hota, Kyonan-machi, Chiba Prefecture, 30 fath.[55 m] (NSMT-Mo 77203: T. Inaba).

REMARKS: A variable species, with a siphonal canal that is short to moderately long, and spiral cords that may be low with shallow intervals or moderately strong with crisp intervals. Collabral threads may be low or sharply defined.

Turris brevicanalis is very similar to T. pagasa , but grows larger, with a distinctly thicker subsutural cord, and relatively wider sinus cord, and usually shows a series of fine spiral threads immediately above the suture on the last whorl; T. brevicanalis lacks the pale band anterior to the sinus cord that is distinctive of T. pagasa .

Figures

PLATE 6. Turris brevicanalis, Kuroda, Oyama, 1971; A, B—holotype, Tanabe Bay, Japan, NSMT-MoR-06103, 69.5 x 24.3 mm; C, D—Tanabe Bay, Japan, ANSP, 85.2 x 24.3 mm; E, F—Jogashima Is, Sagami Bay, Japan, NSMT-MoR 77202, 70.0 x 19.2 mm; G, H—Off Wakayama Prefecture, Japan, NSMT-Mo 77201: Sakurai colln 74.2 x 20.3 mm.