Turridrupa pallurae Cossignani, 2023

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 : 47-49

Turridrupa pallurae Cossignani, 2023

( Figs. 17 A–F , 21 G–H )

Turridrupa pallurae Cossignani, 2023: 113 , unnumbered figs. ( holotype). Type loc. Philippines, Mindanao, Aliguay Island.

Type material

HOLOTYPE: 17.7 mm ( MMM; Figs. 17 A–B ).

PARATYPES 1–3: type locality (Vezzaro collection).

Sequenced material

NEW CALEDONIA: CONCALIS: Stn. DW3017 (MNHN-IM-2007-35635; MNHN-IM-2007-35636).

Material examined

PHILIPPINES: Mindanao, Surigao, dredged at about 100 m, MC coll.—Mindanao, Balut Island, Tinina, 100– 200 m, by tangle net ( PS- 1040).— NEW CALEDONIA: CONCALIS: Stn DW2936, 1 spm (MNHN-IM-2014- 566)—Stn DW3016, 1 spm (MNHN-IM-2014-567)—Stn. DW3020, 1 spm ( PS- 451).—LAGON: Stn DW830, 1 spm (MNHN-IM-2014-569)—Stn DW1148, 1 spm (MNHN-IM-2000-30412, radula voucher).—BATHUS 4: Stn DW933, 1 spm (MNHN-IM-2014-570)—Stn DW940, 1 spm (MNHN-IM-2014-571). — MUSORSTOM 4: Stn DW227, 2 spms (MNHN-IM-2014-572).— WALLIS ET FUTUNA: MUSORSTOM 7: Stn DW499, 1 spm (MNHN-IM-2014-568).

Distribution

So far known from the Philippines, New Caledonia, and Wallis and Futuna in depths between 100 and 395 m.

Description

Shell medium-sized for genus, up to 20.1 mm in height with 6 to 7 teleoconch whorls; broadly fusiform to claviform, with spire about 1.3 times height of aperture including siphonal canal; suture deeply indented; siphonal canal constricted, curved to right, terminally truncate, barely indented, anal sinus deep, U-shaped, at the termination of the second spiral cord; parietal callus-pad well developed and thick; lip preceded by a low broadly convex varix.

Spire whorls with 3–4 spiral cords (4th cord may be fully visible or barely showing at suture), 2nd and 3rd spiral cords stronger and situated on the periphery; spiral cords narrower than their intervals; apart from subsutural cord which is undulating, all spiral cords have laterally elliptical and shallow gemmules, about 11 per spiral on penultimate whorl, stronger developed on sinus cord and third spiral cord; base of last whorl with about 5 strong spiral cords, plus 7 fine, weak closely-set spirals cords on rostrum, intervals between cords with several fine spiral threads.

Protoconch domed, of about 2.75 whorls, last 1.5 whorls with arcuate opisthocline axial riblets.

Colour buff to whitish-cream, spiral cords maculated with golden brown spots, mainly situated in the interspaces of the gemmules, varix and parts of the base slightly darker brown, protonch whitish-cream.

Radula ( Figs. 21 G–H .) ~50 rows of teeth, including 18 nascent rows; length ~1.25 mm. Central formation with three elements: rhombic central cusp (length/width ~3) and broad, narrow lateral elements. Lateral elements with pronounced blunt cusp on posterior margin; in most rows, they reach or fuse with central cusp ( Fig. 23 H ). Marginal teeth ~90 µm long (1.3%AL). Major limb narrow, constricted at mid-length, forming “waist.” Accessory limb short, ~0.45 of major limb’s length. Constricted at fusion with dorsal surface of major limb, nearly same width along length, slightly narrower than major limb. Accessory limb does not reach outer limit of major limb.

Remarks

Turridrupa pallurae is remotely similar to Turridrupa magnifica sp. nov., but differs in the much less broad shape, the higher spire, the finer spiral threads in the interstices of the spiral cords, and the stronger and less numerous gemmules. For comparison with the closest species, Turridrupa fedosovi sp. nov., we refer to the remark section of the latter species.

Figures

FIGURE 17. Turridrupa pallurae Cossignani, 2023: A–B. Holotype, 17.7 mm, Philippines, Aliguay Island, MMM Cupra Marittima; C–E. ESEM voucher (E: protoconch), 20.1 mm, New Caledonia, LAGON, Stn. DW1148, MNHN-IM-2000-30412; F. Sequenced specimen, 17.8 mm, New Caledonia, CONCALIS, Stn. DW3017, MNHN-IM-2007-35635. Turridrupa fedosovi sp. nov.: G–I. Holotype, 19.2 mm, New Caledonia, KANACONO, Stn. DW4706, MNHN-IM-2013-68165; J–K. Paratype 1, 17.3 mm, New Caledonia, Grand Passage, 250–350 m, PS-1065.

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.

FIGURE 23. Radulae of Turridrupa species. A. T. consobrina, New Caledonia, MONTROUZIER, Stn. 1312; B. T. bijubata, New Caledonia, Isle des Pins, 2 m, C. T. elongata sp. nov., Paratype 1 Papua New Guinea, PAPUA NIUGINI, Stn. PR48; D. T. polynesia sp. nov., Society Islands, UF428006; E–F. Turridrupa cincta, Madagascar, ATIMO VATAE, Stn. TA01; G–H. Turridrupa cincta, New Caledonia, MONTROUZIER, Stn. 1240.