Leucosyrinx bernardeti, Kantor & Fedosov & Puillandre, 2025

Kantor, Yuri I., Fedosov, Alexander & Puillandre, Nicolas, 2025, Revision of the Indo-Pacific species of the genus Leucosyrinx Dall, 1889 (Neogastropoda: Conoidea: Pseudomelatomidae), European Journal of Taxonomy 999, pp. 1-126 : 64-65

Leucosyrinx bernardeti sp. nov.

urn:lsid:zoobank.org:act:976FD6A3-CB43-408C-90B8-472BF11D516D

Figs 20C–D , 21I–M

Leucosyrinx sp. F – Kantor & Puillandre 2021: figs 11d, 13k.

Etymology

The species is named after Jean-François Bernardet, member of the volunteer team of MNHN, working both on the mollusc and crustacean collections.

Material examined

Holotype (sequenced)

NEW CALEDONIA • Coral Sea, S Lansdowne Bank; 20°51′ N, 161°00′ E; depth not registered; KANADEEP, stn CP5049; MNHN-IM-2013-48121.

Other material (sequenced)

NEW CALEDONIA • 1 lv; Coral Sea , Chesterfield Plateau; 19°39′ N, 158°45′ E; depth 603–630 m; EBISCO, stn CP2600; MNHN-IM-2007-17846 .

Description

MEASUREMENTS (holotype). SL 34.4 mm, AL (with canal) 17.6 mm, AL (without canal) 10.4 mm, SW 10.3 mm.

SHELL (holotype). Shell medium-sized, thin but rather strong, slender, narrowly fusiform, with a high spire, off-white. Paucispiral small protoconch of about 1.75 smooth, bulbous, yellow whorls, protoconch–teleoconch transition marked by appearance of definitive sculpture. Teleoconch whorls weakly obtusely angular on shoulder, subsutural ramp evenly moderately concave on all whorls. Distinct impressed suture. 26–27 moderately developed, slightly oblique, dense axial folds on and shortly below shoulder on last and penultimate whorls, folds do not reach lower suture on teleoconch whorls, gradually diminish on last whorl towards aperture, although still present. Well-developed spiral sculpture of similar width, narrow, low, rounded, and wavy cords over entire shell, including subsutural ramp. 5 slightly broader cords below suture and 4 significantly narrower ones on lower part of ramp and shoulder. Below shoulder on last whorl about 55 cords. Intervals between cords are in most cases narrower than the cords’ width, although can exceed the cord’s width on shell base and canal. Shell base weakly convex, gradually narrows on passing into long and broad weakly curving canal. Narrow oval, poorly differentiated from canal aperture. Well-developed columellar and parietal callus of same color as remaining shell. Medium deep, subsutural, broadly arcuate anal sinus extends across subsutural ramp, confluent with large forward extension of outer lip.

RADULAE ( Fig. 20C–D ; studied in holotype and MNHN-IM-2007-17846, very similar). Marginal teeth duplex, ~320–465 µm in length (4.6–4.9% AL without canal). Major limb medium broad lanceolate in dorsal view, weakly curved. Accessory limb fible, less than half of tooth width, flattened, ~0.75 of total tooth length, inserted into distinct deep socket on dorsal side of major limb extending its entire length.

DNA diagnosis (based on 2 cox 1 sequences)

‘G’ in site 268, ‘G’ in site 337, ‘G’ in site 472, ‘G’ in site 535, ‘G’ in site 604.

Remarks

This highly distinct species is well differentiated from its congeners by its narrow fusiform shell shape and relatively weak development of the spiral sculpture elements. It closely resembles Sibogasyrinx pikei ( Dell, 1963) from New Zealand in overall shell shape but differs notably in the absence of axial subsutural nodules, which are present in S. pikei (see below). The new species also bears a strong resemblance to Leucosyrinx sp. 3 , differing in having more numerous and closely spaced spiral cords. In Leucosyrinx sp. 3 , there are about 40 cords on the last whorl below the shoulder, whereas in L. bernardeti sp. nov. of the same size, there are about 55 cords. Additionally, the axial folds are absent on the last whorl in Leucosyrinx sp. 3 , where they are replaced by an indistinct spiral keel.

Distribution

Coral Sea, 603– 630 m.

Figures

Fig. 20. Radulae of species of Leucosyrinx Dall, 1889. A. Leucosyrinx sp. 2, MNHN-IM-2009-16783, SL 27.9 mm. B. Leucosyrinx sp. 16, MNHN-IM-2009-13401, SL 25.7 mm. C–D. L. bernardeti sp. nov. C. Holotype, MNHN-IM-2013-48121, SL 34.4 mm. D. MNHN-IM-2007-17846, SL 27.3 mm. E. L. bolognai (Bozzetti, 2001), MNHN-IM-2009-16895, SL 43.3 mm. F. L. luzonica (Powell, 1969), MNHN-IM-2009-13444, SL 23.1 mm. G. L. quinetae sp. nov., MNHN-IM-2013-59549, SL 53.8 mm. H. L. breviplicata (E.A. Smith, 1899), MNHN-IM-2007-35063, SL 44 mm. I. Leucosyrinx sp. 26, MNHN-IM-2013-58381, SL 18.5 mm. Scale bars = 100 µm.

Fig. 21. A–F. Leucosyrinx exulans (Dall, 1890). A–C. Holotype, USNM 96499, SL 37 mm. D–F. MNHN-IM-2019-2111, SL 18.1 mm. G–H. Leucosyrinx sp. 16, MNHN-IM-2009-13401, SL 25.7 mm. I–M. Leucosyrinx bernardeti sp. nov. I–K. Holotype, MNHN-IM-2013-48121, SL 34.4 mm. L–M. MNHN-IM-2007-17846, Coral Sea, 603–630 m. N–O. Leucosyrinx sp. 3, MNHN- IM-2007-42445, Philippines, 357–372 m, SL 34.1 mm. All shells at the same scale.