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 : 27

Leucosyrinx sp. 15

Figs 5I , 8L–M

Material examined (sequenced)

PHILIPPINES • 1 lv; Luzon I.; 15°48′ N, 121°47′ E; depth 593 m; AURORA 2007, stn CP2664; MNHN- IM-2009-13331 .

Description

RADULA ( Fig. 5I ). Short, comprises around 30 rows of teeth, 6–7 nascent. Marginal teeth duplex, ~370 µm (5.2% AL without canal). Major limb narrow lanceolate in dorsal view, curved. Accessory limb relatively broad, constitutes about 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 400, ‘A’ in site 460, ‘C’ in site 514.

Remarks

The species is very similar to Leucosyrinx derzellei sp. nov. from Madagascar, differing in less angular axial folds at shoulder. Besides, marginal radular teeth are longer in Leucosyrinx sp. 15 in relation to AL (5.2% vs 2.6%). The phylogenetic analysis clearly demonstrates that both species are separate. Since the species is represented by a single specimen and the interspecific variability can not be estimated, we presently abstain from describing this specimen from the Philippines as a new species.

Figures

Fig. 5. Radulae of species of Leucosyrinx Dall, 1889. A. L. floraecharlottae sp. nov., holotype, MNHN-IM-2007-38823, SL 26.0 mm. B. L. farhatorum sp. nov., holotype, MNHN-IM-2007-42503, SL 41.2 mm (anteriormost part). C. L. farhatorum, MNHN-IM-2009-13498, SL 24.8 mm. D. L. zucconi sp. nov., holotype, MNHN-IM-2009-16820, SL 71.9 mm.E. L. rattiaesp. nov., MNHN-IM-2009-16768, SL 20.2 mm. F. L. derzellei sp. nov., MNHN-IM-2009-14833, SL 32.7 mm. G–H. L. legalli sp. nov., MNHN-IM-2009-16912, SL 29.3 mm. G. Bending plane of the radula. H. Dorsal view of teeth. I. Leucosyrinx sp. 15, MNHN-IM-2009-13331, SL 27.6 mm. Scale bars = 100 µm.

Fig. 8. A–F. Leucosyrinx derzellei sp. nov. A–C. MNHN-IM-2009-14986, holotype, SL 33.3 mm. D. MNHN-IM-2009-14833, south Madagascar, 821–910 m, SL 32.7 mm. E. MNHN-IM-2009-14814, south Madagascar, 821–910 m, SL 32.7 mm. F. MNHN-IM-2009-16918, NW Madagascar, 943–950 m, SL 35.8 mm. G–K. Leucosyrinx legalli sp. nov. G–I. Holotype, MNHN-IM-2009-16915, SL 30.2 mm. J–K. Madagascar, 650–850 m, MNHN-IM-2009-16912, SL 29.3 mm. L–M. Leucosyrinx sp. 15, Philippines, 593 m, MNHN-IM-2009-13331, SL 27.6 mm. All shells at the same scale.