Leucosyrinx sp. 5

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 : 86

Leucosyrinx sp. 5

Figs 28N–O , 29B

Material examined (sequenced)

PAPUA NEW GUINEA • 1 lv; off Lancasay Is., 8°16′ S, 150°29′ E; depth 340–358 m; BIOPAPUA, stn CP3732; MNHN-IM-2009-17198 .

Description

RADULA ( Fig. 29B ). Comprising around 25 rows of teeth, 12 nascent. Marginal teeth duplex, ~120 µm in length (4% AL without canal). Major limb medium broad lanceolate in dorsal view, curved. Accessory limb over half of tooth width, ~0.75 of total tooth length, inserted into distinct socket on dorsal side of major limb.

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

‘C’ in site 5, ‘C’ in site 360, ‘T’ in site 390, ‘T’ in site 417.

Remarks

This small (SL 10.8 mm) species is represented by a single, probably immature, specimen. It is somewhat similar to L. nodulocordata sp. nov. in the presence of nodules on spiral cords. The cords, nevertheless, are much more numerous and closer spaced below the shoulder on the last whorl. Besides, the shell is slenderer and the axial folds are much more numerous. The two species are phylogenetically not closely related.

Figures

Fig. 28. A–G. Leucosyrinx lozoueti sp. nov. A–C. Holotype, MNHN-IM-2013-68662, SL 9.2 mm. D–E. MNHN-IM-2013-68075, New Caledonia, SW of Ile des Pins, 530–545 m, SL 9.2 mm. F–G. MNHN-IM-2013-68076, same locality, SL 8.1 mm. H–L. Leucosyrinx nodulocordata sp. nov. H–J. Holotype, MNHN-IM-2013-9752, SL 10.4 mm. K–L. MNHN-IM-2007-42471, Philippines, 356– 396 m, SL 8.8 mm. M. Leucosyrinx sp. 9, MNHN-IM-2013-68714, New Caledonia, SW of Ile des Pins, 530–545 m, SL 5.7 mm. N–O. Leucosyrinx sp. 5, MNHN-IM-2009-17198, Papua New Guinea, 340–358 m, SL 10.8 mm. All shells at the same scale.

Fig. 29. Radulae of species of Leucosyrinx Dall, 1889. A. L. lozoueti sp. nov., MNHN-IM-2013-68076, SL 8.1 mm. B. Leucosyrinx sp. 5, MNHN-IM-2009-17198, SL 10.8 mm. C. L. archibenthalis Powell, 1969, MNHN-IM-2009-13333, SL 36.7 mm. D–E. Leucosyrinx sp. 6, MNHN-IM-2009-6036, SL 15.2 mm. F. L. placaisae sp. nov., MNHN-IM-2013-48112, SL 18.6 mm. Scale bars = 100 µm.