Turridrupa acutigemmata (E. A. Smith, 1877 )

Stahlschmidt, Peter, Kantor, Yuri I., Zuccon, Dario, Olivera, Baldomero M. & Puillandre, Nicolas, 2025, Revision of the genus Turridrupa (Gastropoda, Turridae) with description of 15 new species, Zootaxa 5708 (1), pp. 1-66 : 8-11

Turridrupa acutigemmata (E. A. Smith, 1877)

( Figs. 2 A–I , 21 A )

Pleurotoma acutigemmata E. A. Smith 1877: 489 . Type loc.: unknown.

Turris ( Tomopleura) acutigemmata ; Melvill 1917: 146, pl. 8, fig. 1.

Pleurotoma (Hemipleurotoma) acutigemmata ; Schepman 1913: 400.

Turridrupa acutigemmata ; Hedley 1922: 226, pl. 42, figs 12–13; Powell 1966: pl. 7, fig. 12; Powell 1967: 415, pl. 301, fig. 1 ( holotype); Shuto 1975:163, pl. 6, figs 10-12 ( holotype); Cernohorsky 1978: 151, pl. 53, fig. 11; Kilburn 1988: 236, fig. 279; Wilson 1994: 195, pl. 40, fig. 22; Stahlschmidt & Fraussen 2011: figs. 6–7; Poppe 2017: plate 1589, fig. 5–6.

Pleurotoma acutigemmata var. minor E. A. Smith, 1904 ( non Philippi. 1844)[Ann. Mag. Nat. Hist., ser. 7, 13]: 457. Type loc.: off south coast of Ceylon [ Sri Lanka], 34 fath.

Type material

HOLOTYPE: 20.7 mm ( NHMUK 1963856 ; Figs. 2 A–C ).

Type of Pleurotoma acutigemmata var. minor : not traced.

Sequenced material

PAPUA NEW GUINEA: PAPUA NIUGINI: Stn PD48 (MNHN-IM-2013-15223).— NEW CALEDONIA: KOUMAC 2.1: Stn KR216 (MNHN-IM-2013-84090)—Stn KR607, (MNHN-IM-2013-81086; MNHN-IM-2013-81513; MNHN-IM-2013-81520; MNHN-IM-2013-85394; MNHN-IM-2013-85509)—KOUMAC 2.3: Stn KD502 (MNHN-IM-2019-2557)—Stn KD577 (MNHN-IM-2019-9518)—Stn KD578 (MNHN-IM-2019-9521)— KANACONO: Stn DW4708 (MNHN-IM-2013-68187).

Material examined

SOUTH AFRICA: Richards Bay, ex pisce ( PS- 94)— PHILIPPINES: Palawan, Puerto Princessa, 10–30 m, 10 spms (MNHN-IM-2014-664; PS- 1118).— NEW CALEDONIA: LAGON: Stn DW07, 1 spm (MNHN-IM-2014- 683)—Stn DW39, 1 spm (MNHN-IM-2014-706)—Stn DW40, 1 spm (MNHN-IM-2014-684)—Stn DW80, 1 spm (MNHN-IM-2014-628)—Stn DW83, 3 spms (MNHN-IM-2014-694)—Stn DW123, 1 spm (MNHN-IM-2014- 605)—Stn DW170, 1 spm (MNHN-IM-2014-639)—Stn DW200, 1 spm (MNHN-IM-2014-630)—Stn DW201, 2 spms (MNHN-IM-2014-601)—Stn DW234, 1 spm (MNHN-IM-2014-705)—Stn DW238, 1 spm (MNHN-IM-2014- 619)—Stn DW314, 1 spm (MNHN-IM-2014-688)—Stn DW315, 1 spm (MNHN-IM-2014-695)—Stn DW320, 1 spm (MNHN-IM-2014-629)—Stn DW334, 2 spms (MNHN-IM-2014-632)—Stn DW345, 1 spm (MNHN-IM-2014-623)—Stn DW347, 2 spms (MNHN-IM-2014-206, Radula voucher)—Stn DW348, 2 spms (MNHN-IM-2014- 685)—Stn DW352, 2 spms (MNHN-IM-2014-618)—Stn DW359, 1 spm (MNHN-IM-2014-667)—Stn DW376, 2 spms (MNHN-IM-2014-673)—Stn DW398, 1 spm (MNHN-IM-2014-637)—Stn DW401, 1 spm (MNHN-IM-2014-615)—Stn DW405, 1 spm (MNHN-IM-2014-621)—Stn DW440bis, 2 spms (MNHN-IM-2014-608)—Stn DW441, 1 spm ( PS- 832)—Stn DW443, 1 spm (MNHN-IM-2014-638)—Stn DW473, 1 spm (MNHN-IM-2014- 666)—Stn DW484, 1 spm (MNHN-IM-2014-610)—Stn DW517, 5 spms (MNHN-IM-2014-704)—Stn DW529, 1 spm (MNHN-IM-2014-675)—Stn DW530, 1 spm (MNHN-IM-2014-692)—Stn DW531, 2 spms (MNHN-IM-2014- 686)—Stn DW534, 2 spms (MNHN-IM-2014-620)—Stn DW541, 1 spm (MNHN-IM-2014-617)—Stn DW542, 4 spms (MNHN-IM-2014-691)—Stn DW570, 1 spm (MNHN-IM-2014-606)—Stn DW572, 1 spm (MNHN-IM-2014- 634)—Stn DW599, 1 spm (MNHN-IM-2014-668)—Stn DW603, 2 spms (MNHN-IM-2014-681)—Stn DW604, 3 spms (MNHN-IM-2014-682)—Stn DW604, 1 spm (MNHN-IM-2014-205, ESEM voucher)—Stn DW632, 1 spm (MNHN-IM-2014-642)—Stn DW633, 3 spms (MNHN-IM-2014-696)—Stn DW643, 1 spm (MNHN-IM-2014- 622)—Stn DW682, 3 spms (MNHN-IM-2014-640)—Stn DW687, 1 spm (MNHN-IM-2014-625)—Stn DW702, 1 spm (MNHN-IM-2014-633)—Stn DW713, 1 spm (MNHN-IM-2014-616)—Stn DW730, 1 spm (MNHN-IM-2014- 631)—Stn DW762, 1 spm (MNHN-IM-2014-602)—Stn DW771, 1 spm (MNHN-IM-2014-614)—Stn DW878, 1 spm (MNHN-IM-2014-604)—Stn DW898, 1 spm (MNHN-IM-2014-641)—Stn DW916, 1 spm (MNHN-IM-2014- 687)—Stn DW933, 1 spm (MNHN-IM-2014-636)—Stn DW936, 1 spm (MNHN-IM-2014-693)—Stn DW937, 2 spms (MNHN-IM-2014-635)—Stn DW985, 5 spms (MNHN-IM-2014-690; PS- 831)—Stn DW986, 1 spm ( MNHN- IM-2014-674)—Stn DW989, 2 spms (MNHN-IM-2014-609)—Stn DW990, 2 spms (MNHN-IM-2014-689)—Stn DW1025, 1 spm (MNHN-IM-2014-600)—Stn DW1025, 2 spms (MNHN-IM-2014-676)—Stn DW1063, 1 spm (MNHN-IM-2014-626)—Stn DW1104, 1 spm (MNHN-IM-2014-703)—Stn DW1105, 1 spm (MNHN-IM-2014- 603)—Stn DW1106, 1 spm (MNHN-IM-2014-613)—Stn DW1112, 1 spm (MNHN-IM-2014-612)—Stn DW1126, 1 spm (MNHN-IM-2014-672)—Stn DW1128, 1 spm (MNHN-IM-2014-698)—Stn DW1129, 2 spms ( MNHN- IM-2014-624)—Stn DW1134, 1 spm (MNHN-IM-2014-702)—Stn DW1145, 1 spm (MNHN-IM-2014-677)—Stn DW1155, 3 spms (MNHN-IM-2014-699)—Stn DW1157, 2 spms (MNHN-IM-2014-697)—Stn DW1159, 1 spm (MNHN-IM-2014-611)—Stn DW1163, 2 spms (MNHN-IM-2014-627)—Stn DW1168, 7 spms (MNHN-IM-2014- 680)—Stn DW1174, 5 spms (MNHN-IM-2014-700)—Stn DW1180, 3 spms (MNHN-IM-2014-669)—Stn DW1181, 3 spms (MNHN-IM-2014-671)—Stn DW1182, 9 spms (MNHN-IM-2014-701)—Stn DW1192, 3 spms ( MNHN- IM-2014-670)—Stn DW1192, 1 spm (MNHN-IM-2014-679)—Stn DW1197, 1 spm (MNHN-IM-2014-678)—Stn DW1205, 1 spm (MNHN-IM-2014-607).—MONTROUZIER: Stn 1260, 3 spms (MNHN-IM-2014-717)—Stn 1261, 1 spm (MNHN-IM-2014-718)—Stn 1304, 7 spms (MNHN-IM-2014-645)—Stn 1308, 1 spm (MNHN-IM-2014-719)—Stn 1309, 2 spms (MNHN-IM-2014-720)—Stn 1311, 1 spm (MNHN-IM-2014-646)—Stn 1314, 6 spms (MNHN-IM-2014-721)—Stn 1322, 2 spms (MNHN-IM-2014-647)—Stn 1323, 2 spms (MNHN-IM-2014- 722).—CHALCAL: Stn D26, 1 spm (MNHN-IM-2014-711).—Campagne d’essais drague epibenthique: Stn DE39, 1 spm (MNHN-IM-2014-709)—DE55: 1 spm (MNHN-IM-2014-710).—PALEO-SURPRISE: Stn DW1384, 1 spm (MNHN-IM-2014-643).—MUSORSTOM 4: Stn DW231, 2 spms (MNHN-IM-2014-707).—MUSORSTOM 6: Stn DW442, 1 spm (MNHN-IM-2014-708).—CORAIL 2: Stn DW20, 3 spms (MNHN-IM-2014-712)—Stn DW43, 1 spm (MNHN-IM-2014-644)—Stn DW63, 2 spms, (MNHN-IM-2014-713)—Stn DW67, 1 spm, (MNHN-IM-2014-714)—Stn DW83, 1 spm (MNHN-IM-2014-715)—Stn DW152, 1 spm (MNHN-IM-2014-716).— FIJI: SUVA 2: DW43, 2 spms (MNHN-IM-2014-648)—DW44, 16 spms (MNHN-IM-2014-649; PS- 1041)—DW74, 1 spm (MNHN-IM-2014-650).—SUVA 4: DW26, 1 spm (MNHN-IM-2014-651)—DW08, 2 spm (MNHN-IM-2014- 652).

Description

Shell medium-sized for genus, up to 21.0 mm in height, narrowly fusiform, with a tall spire, almost twice the height of the aperture including siphonal canal; siphonal canal fairly short, bent slightly to right; anal sinus moderately deep U-shaped, relatively wide, at the termination of the gemmate middle spiral cord of the spire-whorls; parietal callus-pad well-developed; interior of lip with about 6 fine spiral threads; stromboid notch deep, lip preceded by a low, broadly convex varix.

Spire whorls sculptured with three strong cords and a fourth emergent, or half emergent, over the last whorls; subsutural cord narrow, sharply angular; sinus cord with laterally elliptical gemmules, 13–14 on penultimate whorl, surmounted by a thin keel; third and 4th cords smooth, peripheral, equal in width to subsutural cord; base of last whorl with about 10 main spiral ridges, strong, widely spaced, those on fasciole close and fine, interstices with thin spiral threads.

Protoconch pupoid-conic, about 3.5 whorls, last 1.5 with arcuate opisthocline axial riblets.

Colour uniform whitish-yellow to reddish-brown, occasionally with light-brown maculation in interspaces of the gemmules.

Radula ( Fig. 21 A ) with ~55 rows of teeth; 18 nascent rows ~ 2 mm long. Central formation rectangular, slightly wider than long. Sharp, narrow central cusp rhombic, length-to-width ratio ~4. Lateral elements with slightly raised posterior margin, indistinct anterior edge merging into subradular membrane. Lateral elements usually fuse with central cusp, no clear borders. Marginal teeth ~130 µm long (2.2% AL). Broad major limb forms socket for anterior accessory limb insertion. Accessory limb narrows anteriorly, widens posteriorly, width ~equal to major limb. Accessory limb ~0.7 length of major limb, protrudes beyond major limb’s outer limit.

Remarks

Turridrupa acutigemmata is easily recognized by the slender shape, the tall spire, the comparatively few, strong, laterally elliptical gemmules on the sinus cord, and the uniform colouration. In T. jubata ( Hinds, 1843) , the gemmules are more numerous, less conspicuous and the shell is larger. For differences with T. albogemmata Stahlschmidt & Fraussen, 2011 we refer to the remark section of that species.

Distribution

From Southern Natal in the western Indian Ocean to Fiji in the western Pacific.

Figures

FIGURE 2. Turridrupa acutigemmata (E.A. Smith, 1877): A–C. Holotype, 20.7 mm, locality unknown, NHMUK 1963856; D. 17.9 mm, South Africa, Richards Bay, ex pisce, PS-077; E. Sequenced specimen, 17.0 mm, Papua New Guinea, PAPUA NIUGINI, Stn. PD48, MNHN-IM-2013-15223; F–H. ESEM voucher (G: protoconch, H. penultimate whorl), 14.8 mm, New Caledonia, LAGON, Stn. DW604, MNHN-IM-2014-205; I. Radula voucher, 21.9 mm, New Caledonia, Stn. DW347, MNHN- IM-2014-206. Shells at the same scale. Scale bars for ESEM scans: G: 500 µm, H:1 mm.

FIGURE 21. Radulae of Turridrupa species: A. T. acutigemmata, New Caledonia, LAGON, Stn. DW347, SL 22.0 mm, AL 5.9 mm; B. T. neojubata sp. nov., New Caledonia, LIFOU 2000, Stn. 1464; C, D. T. jubata, New Caledonia, LAGON, Stn. DW808; E–F. T. maestratii sp. nov., Paratype 1, New Caledonia, BATHUS 4, Stn. DW942; G–H. T. pallurae, LAGON, Stn. DW1148.