Turridrupa albocastanea Stahlschmidt, Puillandre, Olivera & Kantor sp. nov.

(Figs. 6 A–E)

Turridrupa cf. jubata Tardy & Stahlschmidt 2022: 172, pl. 3 fig. 31.

Type material

HOLOTYPE: Philippines, Mactan Island, Punta Engaño, 30 m, 15.9 mm (MNHN-IM- 2000-30421; Figs. 6 A–D).

PARATYPES 1–2: Marshall Islands, Kwajalein Atoll, west reef, Oceanside, 15 m in a cave, coll. by S. Johnson, 4/1995 (PS-1038; Fig 6 E) .

PARATYPE 3: Mariana Islands, Guam, Apra Harbor, 2–3 m, coral sand, coll. by F. Schroeder, 2004 (PS-1072) .

PARATYPE 4: Mariana Islands, Guam, Orote cliffs, ca. 18 m, coll. by R. Salisbury, 6/1978 (ANSP-358197) .

PARATYPE 5: New Caledonia, Isle des Pines, 22°30.8'S, 167°24.7'E, 9–22 m, coll. by P. Stahlschmidt, 2/2019, Stn IDP-6 (PS-1039) .

Distribution

So far only know from the Philippines, Mariana Islands, Marshall Islands, and New Caledonia.

Description

Shell medium-sized for genus, up to 19.7 mm in height; claviform with spire about 1.4 times the height of the aperture including siphonal canal; spire with 8 to 9 teleoconch whorls, suture incised; siphonal canal fairly short, bent slightly to right; anal sinus deep, linguiform, at the termination of the second 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 sinus very wide and shallow.

Sculpture of narrow spiral cords, with sloping sides, 3 on spire whorls, increasing to 4 on penultimate whorl, almost equal in strength (sinus cord occasionally slightly weaker); sinus cord with 25 to 30 well defined gemmules, other cords may also show weak gemmules; base of last whorl with about 8–9 primary spiral cords and additional spiral threads in the interspaces, especially on the anterior part (up to 5 ones); no axial sculpture.

Protoconch papilliform, about 2 whorls, all except first with arcuate opisthocline axial riblets.

Colour of siphonal canal, the protoconch, and the first few teleoconch whorls creamy-white with distinct brown dashes between gemmules of the sinus cord; from approximately the fifth to the ninth teleoconch whorl chestnut brown to dark brown.

Remarks

Turridrupa albocastanea sp. nov. has some similarities to Turridrupa jubata, but differs in the less fusiform shell and in the different spiral sculpture which consist of spiral cords of almost equal strength while in T. jubata the peripheral cord is much stronger. The new species is also similar to T. aureoresina which, however, differs in the smaller and less claviform shell with a comparatively higher spire, the shorter siphonal canal, and the longer protoconch.

Etymology

In reference to the colouration of the shell.