Leucosyrinx sp.

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 : 80-81

Leucosyrinx sp. 26

Figs 20I , 27C–F

Material examined (sequenced)

PAPUA NEW GUINEA • 1 lv; New Ireland; 2°15′ S, 150°14′ E; depth 450–474 m; KAVIENG 2014, stn CP4446; MNHN-IM-2013-58381 .

SOLOMON SEA • 1 lv; Vitiaz Strait ; 6°01′ S, 147°35′ E; depth 618–626 m; PAPUA NIUGINI, stn CP3993; MNHN-IM-2013-19819 • 1 lv; SE of Tuam Is ; 6°04′ S, 148°10′ E; depth 500–555 m; PAPUA NIUGINI, stn CP4008; MNHN-IM-2013-19918 .

Description

RADULA ( Fig. 20I ). Examined in MNHN-IM-2013-58381, typical of the genus. Marginal teeth duplex, ~240 µm in length (5.2% AL without canal).

DNA diagnosis (based on 3 cox 1 sequences)

‘G’ in site 229, ‘T’ in site 334, ‘C’ in site 427, ‘C’ in site 553.

Remarks

The species is extremely similar to L. breviplicata , being sympatric in the Solomon Sea at similar depths. The specimens of the same size are virtually identical in shell shape and sculpture pattern (compare Fig. 27C and Fig. 26G ), although available specimens (maximal SL 26.4 mm) does not reach the size of the largest L. breviplicata . The phylogenetic tree nevertheless shows that the species are not closely related.

We abstain from the description of a new species due to insufficient material for the evaluation of the intraspecific variability.

Distribution

Solomon Sea, Papua New Guinea, 450– 618 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. 27. A–B. Leucosyrinx sp. 7, MNHN-IM-2013-19933, Solomon Sea, 500–575 m, SL 26.5 mm. C–F. Leucosyrinx sp. 26. C. MNHN-IM-2013-19819, Solomon Sea, 618–626 m, SL 26.4 mm. D–F. MNHN-IM-2013-19918, Solomon Sea, 500–555 m, SL 23 mm. G–H. Leucosyrinx sp. 4, MNHN- IM-2013-19929, Solomon Sea, 500–555 m, SL 25.7 mm.I–J. Leucosyrinx sp. 6, MNHN-IM-2009-6036, Solomon Is., 314–410 m, SL 15.2 mm. All shells at the same scale.

Fig. 26. A–K. Leucosyrinx breviplicata (E.A. Smith, 1899) comb. nov. All specimens, except holotype, from the Solomon Is. A–B. Holotype, ZSI, M 923/1, SL 25.1 mm (from ZSI, https:// zsicollections.in/specimen/ZSI0000003966). C. MNHN-IM-2007-42525, 609–625 m, SL 33.4 mm. D. MNHN-IM-2007-17933, SL 33.1 mm. E. MNHN-IM-2009-16803, 490–520 m, SL 33.7 mm. F. MNHN-IM-2009-16788, 195–197 m, SL 44.5 mm. G. MNHN-IM-2013-19930, 500–575 m, SL 26.8 mm. H–J. MNHN-IM-2009-16810, 485–520 m, SL 45.1 mm. K. MNHN-IM-2009-16814, 485–520 m, SL 46.8 mm. L. Leucosyrinx kirai (Powell, 1969) comb. nov., holotype ANSP 232552, SL 35.3 mm (photo from ANSP website http://clade.ansp.org/malacology/collections/details. php?mode=details&catalognumber=232552). All shells at the same scale.