Turridrupa gourgueti Stahlschmidt, Puillandre, Olivera & Kantor, 2025

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 : 27-28

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

( Figs. 9 H–M )

Turridrupa sp. 1 Boutet et al. 2020: 457, unnumbered fig.

Type material

HOLOTYPE: French Polynesia, Society Islands , Tahiti, Baie Phaëton, 0–35 m, 12.0 mm (MNHN-IM-2000-30418,

Figs. 9 H–J ).

PARATYPE 1: type locality ( PS-618 , Fig. 9 K ) .

PARATYPE 2: French Polynesia, Society Islands , Tahiti, Paea (MNHN-IM-2000-30432, Figs. 6 L–M PARATYPE 3: same locality as Paratype 2 ( PS-619 ).

Distribution

Presently known only from the Society Islands ( type material) and the Tuamotu Archipelago of French Polynesia ( Boutet et al., 2020), from intertidal to 35 m.

Description

Shell rather small, up to 12 mm in height, 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 very 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 sometimes slightly stronger); sinus cord often gemmulated, other cords may also show weak gemmules; last whorl with about 10 spiral cords, most intervals between cords without spiral threads, but in the area of the neck with around 3 well-developed spiral threads; no axial sculpture.

Protoconch papiliform, paucispiral of about 1.5 whorls, smoth, except last third with well-developed arcuate opisthocline axial riblets.

Background colour pale brown with diffuse white blotches and white dots mainly situated on the spiral cords.

Remarks

Turridrupa gourgueti sp. nov. is similar to Turridrupa consobrina in general appearance but is easily distinguished from the latter in the paucispiral protoconch (about 1.5 whorls in T. gourgueti compared to about 4 whorls in T. consobrina ), the shorter spire, the weaker spiral cords, and the different colour pattern (missing the dark brown spots of T. consobrina ).

Ethymology

Named in honour of Robert Gourguet ( French Polynesia) for his enthusiasm and dedication to the French Polynesian molluscan fauna. Robert called our attention to the undescribed Turridrupa species and provided the type material .

Figures

FIGURE 6. Turridrupa albocastanea sp. nov.: A–D. Holotype, Philippines, Mactan Island, Punta Engaño, 30 m, 15.9 mm, MNHN IM-2000-30421; E. Paratype 1, Marshall Islands, Kwajalein Atoll, west reef, 15 m, 18.5 mm. PS-1038. Turridrupa aureoresina sp. nov.: F–H. Holotype, 14.5 mm, Philippines, Olango Island, MNHN-IM-2000-30419; I. 12.3 mm, Japan, Kii, Sakai, 40 m, MC-coll; J-K. Paratype 2, ESEM voucher (K: protoconch), 10.6 mm, Philippines, Bohol, Panglao, MNHN-IM- 2000-37775. All shells at the same scale. Scale bar for shells 10 mm, for protoconch 500 µm.

FIGURE 9. Turidrupa astricta (Reeve, 1843): A–C. Lectotype, 13.6 mm, French Polynesia, Tuamotu Archipelago, Anaa, NHMUK 1963806; D. Sequenced specimen, 13.6 mm, Hawaii, French Frigate Shoals, 62 feet, UF 456593; E. Sequenced specimen, 9.9 mm, French Polynesia, Society Islands, Moorea, Afareitu, 15–25 m, UF 447633; F-G. ESEM voucher (G: protoconch), 11.5 mm, French Polynesia, Marquesas, S. Nuku Hiva, 5–25 m, PS-445. Turridrupa gourgueti sp. nov.: H–J. Holotype, 12.0 mm, French Polynesia, Society Islands, Tahiti, Baie Phaëton, 0–35 m, MNHN-IM-2000-30418; K. Paratype 1, 11.2 mm, type locality, PS-618; L–M. ESEM voucher (M: protoconch), 11.5 mm, French Polynesia, Society Islands, Tahiti, Paea, MNHN-IM-2000-30432. All shells at the same scale. Scale bars: G, M: 500 µm.