Leucosyrinx sp. 8

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 : 41

Leucosyrinx sp. 8

Figs 10H , 13J–K

Material examined (sequenced)

SOUTHERN NEW CALEDONIA • 1 lv; Pass de la Sarcelle, 22°27′ N, 167°25′ E; depth 470–570 m; TERRASSES, stn DW3083; MNHN-IM-2009-29323.

Description

RADULA ( Fig. 10H ). Marginal teeth duplex, ~240 µm in length (4.6% AL without canal). Major limb medium broad, lanceolate in dorsal view, curved. Accessory limb constitutes slightly over half of tooth width, ~0.75 of total tooth length, inserted into distinct deep socket on dorsal side of major limb.

DNA diagnosis (based on 1 (!) cox 1 sequence)

‘C’ in site 286, ‘C’ in site 428, ‘C’ in site 436.

Remarks

This medium-sized (SL 20.1 mm) species is represented by a single specimen. Since the variability is unknown, we abstain from a formal description of the new species.

It is similar to Leucosyrinx sp. 22 ( Fig. 13G–I ), also from southern New Caledonia, although the phylogenetic tree demonstrates that they are not closely related. Conchologically it differs in a much better developed spiral sculpture of irregularly and broadly-spaced spiral cords.

Distribution

New Caledonia, 470– 570 m.

Figures

Fig. 10. Radulae of species of Leucosyrinx Dall, 1889. A. L. oliverioi sp. nov., holotype, MNHN- IM-2007-17928, SL 37.5 mm.B–C. L. claviforma, MNHN- IM-2013-58303, SL 19.1 mm.B. Dorsal view of the radula membrane. C. Bending plane, showing marginal teeth in different views. D–E. L. urbanae sp. nov., MNHN-IM- 2009-17215, SL 14.1 mm. D. Dorsal view of the radula membrane. E. Bending plane, showing marginal teeth in different views. F. Leucosyrinx sp. 24, MNHN-IM-2013-66098, SL 21.6 mm. G. Leucosyrinx sp. 22, MNHN-IM-2013-48155, SL 24.2 mm. H. Leucosyrinx sp. 8, MNHN-IM-2009-29323, SL 20.1 mm. I. L. boiteuxi sp. nov., MNHN-IM-2013-19848, SL 46.5 mm. Scale bars = 100 µm.

Fig. 13. A–D. Leucosyrinx urbanae sp. nov. A–C. Holotype, MNHN-IM-2009-18962, SL 14.2 mm. D. MNHN-IM- 2009-17215, Papua New Guinea, 499–517 m, SL 14.1 mm. E. Leucosyrinx sp. 23, MNHN-IM-2009-29312, SL 18.0 mm. F. Leucosyrinx sp. 24, MNHN-IM-2013-66098, SL 21.6 mm. G–I. Leucosyrinx sp. 22. G–H. MNHN-IM-2009-29110, southern New Caledonia, 756–769 m, SL 22.4 mm. I. MNHN-IM-2013-48160, Coral Sea, 900–950 m, SL 22.6 mm. J–K. Leucosyrinx sp. 8, MNHN-IM- 2009-29323, southern New Caledonia, 470–570 m, SL 20.1 mm. All shells at the same scale.