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 : 48-49

Leucosyrinx sp. 21

Figs 11G–H , 15F

Material examined (sequenced)

PHILIPPINES • 1 lv; Luzon I.; 15°48′ N, 121°47′ E; depth 593 m; AURORA 2007, stn CP2664; MNHN-IM-2009-13325 • 1 lv; Luzon I.; 15°00′ N, 123°06′ E; depth 1155–1302 m; AURORA 2007, stn CP2685; MNHN-IM-2009-13324 .

Description

RADULA ( FIG. 15F ; MNHN-IM-2009-13324). Long, comprising about 40 rows of teeth, 20 nascent. Marginal teeth duplex, ~200µm in length (2.6% AL without canal). Major limb medium broad lanceolate in dorsal view, curved. Accessory limb constitutes about half of tooth width, ~0.8 of total tooth length, inserted into distinct not deep socket on dorsal side of major limb.

DNA diagnosis (based on 2 cox 1 sequences)

‘T’ in site 205, ‘G’ in site 484, ‘C’ in site 532, ‘T’ in site 544.

Remarks

The species is represented by two incomplete specimens collected in geographic proximity, but at greatly different depth. The specimens are also quite different in the shell outline. ASAP suggests their conspecifity that will need to be confirmed with additional material.

Leucosyrinx sp. 21 resembles several species – L. floraecharlottae sp. nov., L. rattiae sp. nov., and especially L. herosae sp. nov., none of them closely related phylogenetically.

Distribution

Philippines, 593–1155 m.

Figures

Fig. 11. A–D. Leucosyrinx sp. 25. A–C. MNHN-IM-2009-13478, Philippines, 1378–1436 m SL 39.8 mm. D. MNHN-IM-2009-13429, Philippines, 593 m, SL 31.6 mm. E–F. Leucosyrinx sp. 10, MNHN-IM-2009-16749, Solomon Is., 396–423 m, SL 41 mm. G–H. Leucosyrinx sp. 21. G. MNHN- IM-2009-13325, Philippines, 953 m, SL 26.4 mm. H. MNHN-IM-2009-13324, Philippines, 1155– 1302 m, SL 27.5 mm. I. Leucosyrinx sp. 20, MNHN-IM-2009-16833, Solomon Is., 1136–1750 m, SL 28.5 mm. J–K. Leucosyrinx sp. 18. J. MNHN-IM-2013-58789, Papua New Guinea, 672–1150 m, SL 24.3 mm. K. MNHN-IM-2009-16911, Madagascar, 650–850 m, SL 22.4 mm. L. Leucosyrinx sp. 14; MNHN IM-2013-48145, Coral Sea, 490–830 m, SL 15.6 mm. A–F = at the same scale; G–L = at the same scale.

Fig. 15. Radulae of species of Leucosyrinx Dall, 1889. A. L. margaritae (E.A. Smith, 1904), MNHN- IM-2009-13446, SL 40.9 mm. B. L. margaritae, MNHN-IM-2013-19931, SL 27.5 mm. C. L. zahariasi sp. nov., MNHN-IM-2013-69116, SL 15.8 mm (AL 4.4). D. L. jeedara Kantor, Hallan & Criscione, 2022, holotype, AMS C.483810, SL 31.3 mm. E. L. truwalamuka Kantor, Hallan & Criscione, 2022, holotype, AMS C.557045, SL 30.9 mm. F. Leucosyrinx sp. 21, MNHN-IM-2009-13324, SL 27.5 mm. G. L. herosae sp. nov., MNHN-IM-2009-17089, SL 32.2 mm. H. L. bourgeoisae sp. nov., holotype, MNHN-IM-2013-19785, SL 32.1 mm. I. Leucosyrinx sp. 1, MNHN-IM-2013-66109, New Caledonia, 700–740 m, SL 28.2 mm. Scale bars = 100 µm.