Turridrupa deceptrix Hedley, 1922

(Figs. 7 A–G)

Turridrupa deceptrix Hedley, 1922: 227, pl. 42, fig. 14; Powell 1967: 422, pl. 301, fig. 2. Type loc.: Darnley Island, Queensland, 55 m.

Turridrupa acutigemmata (non Smith, 1877); Kilburn 1988: 236, fig. 279.

Type material

HOLOTYPE: 13.6 mm (AMS C103536; Figs. 7 A–C).

Material examined

SOMALIA: off Ras Hafun, 50–80 m, 2 spms (Gori coll.). — TANZANIA: Zanzibar, Unguja Island, 3 m, 2 spms (Gori coll.).— MOZAMBIQUE: INHACA: Stn MD13, 2 spms (MNHN-IM-2014-201)—MR14, 1 spm (MNHN- IM-2014-202)—NE Inhaca Island, 50–90 m, 2 spm (PS- 1069). — SOUTH AFRICA: Richards Bay, ex pisce, 2 spms (PS- 1070), 1 spm (MNHN-IM-2014-183)—Durban, Bayhead, 1 spm (Gori coll.)—Umkomaas, 110–130 m, 1 spm (PS- 1080). — MADAGASCAR: ATIMO VATAE: Stn TA20, 1 spm (MNHN-IM-2014-203; Fig. 7 D)—Stn TP11, 1 spm (MNHN-IM-2014-200). — SRI LANKA: Beruwala, 35 m, 2 spms (PS- 1068; Figs. 7 F–G). — THAILAND: off SW Phuket, 100–150 m, 2 spms (Gori coll.), 1 spm (PS- 1079). — JAPAN: Kii Strait, off Shimo-kusui in Nada-cho, 1 spm (ANSP 420828; Fig 7 E).

Distribution

Presently known from eastern Africa (Somalia to South Africa), Madagascar, Sri Lanka, Thailand, Japan and Australia (Queensland). Most specimens were collected in depths between 35 to 150 m while a single specimen from Madagascar (MNHN- 2014-203) was collected in the intertidal.

Description

Shell medium-sized for genus, up to 17.8 mm in height, solid, narrowly claviform, siphonal canal moderately short, truncate; whorls fairly convex with periphery basal on early whorls, submedian on later ones, suture deep, somewhat channelled. Anal sinus deep, U-shaped; interior of outer lip with 5 spiral ridges; parietal pad large. Spiral cords 3 on early whorls (the basal one the strongest, subsutural one weakest), a 4th cord progressively showing above suture, often becoming fully developed on antepenultimate whorl, sinus cord in most specimens not nodular or slightly undulating, but in some specimens with low nodules; base of last whorl with 8–9 wide-set spiral cords, spiral cords narrow, with sloping sides, intervals with an occasional spiral ridge and fine collabral threads.

Protoconch domed, 4 whorls, last 2.5 whorls with arcuate axial riblets.

Shell colouration varies from pale-buff, light orange-brown to brown.

Remarks

Turridrupa deceptrix Hedley, 1922 is closest to Turridrupa aureoresina sp. nov. but differs in the less nodular sinus cord, the more convex whorls, the narrower spiral cords with sloping sides, and the denser axial sculpture on the protoconch. Turridrupa deceptrix also resembling T. acutigemmata (E. A. Smith, 1877) but differs in a more solid shell and in having an almost smooth sinus cord while the latter has well developed gemmules on the sinus cord as well as much stronger and elevated third spiral cord.