Leucosyrinx jeedara Kantor, Hallan & Criscione, 2022

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 : 53

Leucosyrinx jeedara Kantor, Hallan & Criscione, 2022

Figs 15D , 18A–E

Leucosyrinx jeedara Kantor, Hallan & Criscione, 2022: 242 , figs 9a–i, 11a–b.

Type material

Holotype

AUSTRALIA • Great Australian Bight ; 34°44.4′ S, 131°50.4′ E; depth 1350– 1321 m; AMS, C.483810.

Material examined

Total of 12 specimens, 6 sequenced (detailed data see Kantor et al. 2022: 242).

Description

SHELL. Medium-sized, reaching 33 mm, broadly fusiform, with high spire, from chalky white to to light tan. Protoconch unknown. Teleoconch whorls distinctly roundly angular on shoulder, subsutural ramp, concave on all whorls. Weak subsutural cord. Channeled suture. Strong, oblique, slightly sinuous axial folds on and below shoulder on last and penultimate whorls, reaching lower suture on upper whorls and extend to shell base on last whorl. 19–24 on last whorl, 14–21 on penultimate whorl. Weak to moderately developed spiral sculpture of similar in width, low, rounded cords over entire shell, including subsutural ramp in some specimens, with intervals narrower than cords’ width. Shell base medium convex, rapidly passing into medium-long canal. Medium broad, elongate-oval aperture, well differentiated from canal. Well-developed columellar and parietal callus of same color as remaining last whorl. Deep, subsutural, broadly arcuate anal sinus extends across subsutural ramp, confluent with large forward extension of outer lip.

RADULA ( Fig. 15D ; studied in holotype and two paratypes: AMS C.532680 and AMS C.532695). Comprising 33 rows of teeth, 4 nascent. Marginal teeth duplex, ~420 µm in length (4.4% AL without canal). Major limb narrow lanceolate in dorsal view, curved. Accessory limb constitutes about half of tooth width, inserted into distinct medium deep socket on dorsal side of major limb.

DNA diagnosis (based on 3 cox 1 sequences)

‘T’ in site 56, ‘A’ in site 58, ‘G’ in site 217.

Remarks

The species exhibits uniformity in shell shape but is variable in the number of axial ribs and spiral cords. In shell outline and sculpture pattern L. jeedara most resembles L. thisbe comb. nov., differing in a less pronounced subsutural fold and a much smaller shell (33 vs 75 mm). It also resembles L. mellvilli differing in its smaller shell, higher last whorl and a relatively lower spire.

Distribution

Great Australian Bight, 962–1509 m ( Kantor et al. 2022).

Figures

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.

Fig. 18. A–E. Leucosyrinx jeedara Kantor, Hallan & Criscione, 2022. A–C. Holotype, AMS C.483810, Australia, Great Australian Bight, 1350–1321 m, SL 31.3 mm. D. Paratype, AMS C.571741, Australia, Great Australian Bight, 1509–1544 m, SL 25.6 mm. E. Paratype, AMS C.571740, Australia, Great Australian Bight, 1350–1321 m,SL 28.1 mm.F–J. Leucosyrinx truwalamuka Kantor, Hallan & Criscione, 2022. F–H. Holotype, AMS C.557045, Australia, Tasmania, 965–941 m, SL 30.9 mm. I–J. Paratype, TMAG E59172, Australia, Tasmania, 965–941 m, SL 33.2 mm. All shells at the same scale.