Leucosyrinx undetermined

Leucosyrinx sp. 13 Fig. 17F–H Material examined (sequenced) NORTH NEW CALEDONIA • 1 lv; Grand Passage; 20°17′ S, 163°50′ E; depth 600–1100 m; CONCALIS, stn CP3027; MNHN-IM-2009-13552. DNA diagnosis (based on 1 (!) cox 1 sequence) ‘A’ in site 121, ‘C’ in site 500, ‘C’ in site 538. Remarks The species, represented in our material by a singleton, strongly resembles the miniature L. thisbe comb. nov. (SL 39 vs 75 mm). It differs in the absence of strong subsutural cord and in its impressed suture instead of distinctly canaliculated one in L. thisbe. It also resembles L. halicyria (Melvill, 1904), differing in a darker shell and much thinner spiral cords. Another somewhat similar species is L. melvilli (Schepman, 1913), from which it differs in a less bulging last whorl and more gradual passing into the shell base and canal. None of them are phylogenetically closely related to Leucosyrinx sp. 13.