Turridrupa consobrina Powell, 1967

(Figs. 8 A–G, 23 A)

Turridrupa astricta consobrina Powell, 1967: 418, pl. 305, fig. 3. Type loc.: Maalaea Bay, Maui Island, Hawaii, 12– 15 m. Turridrupa astricta consorbrina [sic]; Springsteen & Leobrera, 1986: 274, pl. 78, fig. 13.

Turridrupa consobrina; Kay, 1979: 340, fig. 113J; Severns, 2011: 384, fig. 5; Tardy & Stahlschmidt 2022: 172, pl. 3 fig. 32.

Type material

HOLOTYPE: 19.2 mm (BPBM 8914; Figs. 8 A–C).

Sequenced material

MOZAMBIQUE: MAINBAZA: Stn DW 3168, 26°12'S, 35°03'E, 97– 90 m, 2 spms (MNHN-IM-2009-7014, Figs. 8 F; MNHN-IM-2009-7015).— PHILIPPINES: PANGLAO 2004, Stn L 46, 9°30.9'N, 123°41.2'E, 90–110 m, 3 spms (MNHN-IM-2007-40840; MNHN-IM-2007-40841; MNHN-IM-2007-40842, Figs. 8 D–E).— VANUATU: SANTO 2006: Stn DS 04, 15°31.4'S, 167°14.1'E, 25 m, (MNHN-IM-2007-40986).

Material examined

INDONESIA: South of Pulau Subi Besar, 2°48'37"N, 108°59'15.6"E, 12–24 m, sand and rubble, coll. by F. Lorenz, 1 spm (PS- 446)— PHILIPPINES: PANGLAO 2004: Stn B22, 1 spm (MNHN-IM-2014-82)—Stn B35, 1 spm (MNHN-IM-2014-91)—Stn L41, 7 spms, MNHN-IM-2014-83)—Stn L42, 2 spms (MNHN-IM-2014-94)—Stn L46, 46 spms (MNHN-IM-2014-87)—Stn L49, 2 spms (MNHN-IM-2014-95)—Stn L51-60, 5 spms (MNHN-IM-2014-85)—Stn L61-64, 2 spms, MNHN-IM-2014-84)—Stn L65-68, 69 spms, (MNHN-IM-2014-80)—Stn L69- 73, 58 spms (MNHN-IM-2014-79)—Stn L74-75, 47 spms (MNHN-IM-2014-88)—Stn L76, 52 spms (MNHN- IM-2014-81)—Stn P4, 8 spms (MNHN-IM-2014-89)—Stn S10, 2 spms (MNHN-IM-2014-92)—Stn S22, 1 spm (MNHN-IM-2014-93)—Stn S28, 1 spm (MNHN-IM-2014-86)—Stn T38, 1 spm (MNHN-IM-2014-90).— Cebu, Mactan, Punta Engano, tangle nets, 100–180 m, 6 spms (MNHN-IM-2014-96).— MICRONESIA: Palau, NW off Ulong Island, 7°18.7'N, 134°13.6'E, 30–34 m, floor of cave, coll. by P. Stahlschmidt, 1 spm (PS- 1130).— NEW CALEDONIA: CORAIL 2: Stn DW02, 1 spm (MNHN-IM-2014-510)—Stn DW57, 1 spm (MNHN-IM-2014- 511)—Stn DW102, 1 spm (MNHN-IM-2014-512)—Stn DW122, 1 spm (MNHN-IM-2014-513)—Stn DW134, 1 spm (MNHN-IM-2014-514)—Stn DW157, 1 spm (MNHN-IM-2014-515)—LAGON: Stn DW78, 1 spm (MNHN- IM-2014-534)—Stn DW295, 1 spm (MNHN-IM-2014-516)—Stn DW489, 1 spm (MNHN-IM-2014-517)— MONTROUZIER: Stn 1318, 6 spms (MNHN-IM-2014-518)—Stn 1319, 20 spms (MNHN-IM-2014-519)—Stn 1273, 3 spms (MNHN-IM-2014-520)—Stn 1312, 1 spm (MNHN-IM-2014-522)—Stn 1313, 5 spms (MNHN-IM-2014-523)—Stn 1315, 1 spm (MNHN-IM-2014-524)—Stn 1271, 2 spms (MNHN-IM-2014-525)—Stn 1261, 1 spm (MNHN-IM-2014-526)—Stn 1321, 1 spms (MNHN-IM-2014-527)—Stn 1374, 3 spms (MNHN-IM-2014-528)— Stn 1357, 4 spms (MNHN-IM-2014-529)—Atelier LIFOU: Stn 1429, 1 spm (MNHN-IM-2014-530)—Stn 1432, 4 spms (MNHN-IM-2014-531)—Stn 1435, 1 spm (MNHN-IM-2014-532)—Stn 1449, 1 spm (MNHN-IM-2014- 533)—CHALCAL: Stn D19, 1 spm (MNHN-IM-2014-535).—ISLE DES PINS, Stn. IDP 5.2, 1 spm (PS- 1081).— AUSTRALIA (NORFOLK ISLAND): Cemetary and Emily Bays, beached, 1 spm (PS- 1257).— HAWAII: Oahu, Mamela Bay, 21°17'30"N, 157°53'00"W, 20–40 m, dredged by G. Stossier, 1 spm (PS- 454).

Distribution

The species is known from East Africa to Hawaii, in depths between 5 to about 120 m.

Description

Shell medium-sized, up to 19.2 mm in height; slender claviform shaped, with 7 to 8 teleoconch whorls, spire twice height of the aperture including canal; suture very shallow; siphonal canal fairly short, bent slightly to right; anal sinus moderately deep, U-shaped at the termination of the middle spiral cord; parietal callus-pad well developed; interior of lip with about 7–10 fine spiral threads; lip preceded by a low, broadly convex varix; stromboid notch well developed and wide.

Sculpture of narrow spiral cords, with sloping sides, 3 on spire whorls, increasing to 4 on penultimate whorl, almost equal in strength (subsutural cord weaker and sinus cord sometimes slightly stronger); sinus cord often with gemmules, other cords may also show weak gemmules; last whorl with about 10 primary spiral cords, intervals between cords with 1–9 fine spiral threads; no axial sculpture.

Protoconch domed, about 4 whorls, the last two whorls with arcuate opisthocline axial riblets.

Colour buff to pale golden-brown, maculated with dark reddish-brown spots, about 15–20 per whorl on the sinus cord but irregularly disposed also on the other cords of both the spire and the base.

Radula (Fig. 23 A)>35 rows of teeth, including 20 nascent rows; length ~0.9 mm. Anterior part missing due to preparation. Central formation has three closely spaced elements: rhomboid central cusp (length/width ~3.5) and irregular trapezoid lateral elements. Lateral elements with indistinct anterior/lateral margins, slightly elevated, widest posterior margin. Lateral elements fuse with central cusp in most rows but separate in anteriormost section. Marginal teeth ~80 µm long (2.6% AL). Major limb broad, with shallow socket for accessory limb insertion. Accessory limb narrow anteriorly, broadens gradually, nearly as wide as major limb. Length ~0.8 of major limb, slightly extends beyond outer limit of major limb.

Remarks

Turridrupa astricta consobrina was described as “a North Pacific subspecies” of Turridrupa astricta (Reeve, 1843) differing in having all three spiral cords on spire whorls equally strong (instead of the sinus cord being stronger), in the more gemmulated sinus cord, and a different colour pattern (in T. astricta the maculations are less numerous and more widely spaced and darker elongated dashes). Kay (1979) raised T. consobrina to species rank, which is confirmed by the molecular analysis that clearly differentiates both species.

T. consobrina is also similar to Turridrupa gourgueti sp. nov., for differences we refer to the remark section of the latter species.