Pertusiconcha tridentata Chistikov, 1982

Scarabino, Victor, 2008, New species and new records of scaphopods from New Caledonia, Mémoires du Muséum national d'Histoire naturelle 196, pp. 215-268 : 247

Pertusiconcha tridentata Chistikov, 1982

Pertusiconcha tridentata - Scarabino 1995: 312, figs 114, 115 h. Material cited: 15 lots (20 spms) from Loyalty Basin and Loyalty Ridge, live in 860-2100 m, shells in 2470 m.

Dentalium (Dentalium) lessoni - Lamprell & Healy 1998: 40: figs 29F, 30F, 36 (non D. lessoni Deshayes, 1825 ).

NEW MATERIAL EXAMINED. — New Caledonia proper. 960-1100 m, 1 lv; stn CP 708, Passe southeast of Ngoe , 21°43’S, BATHUS 1: stn CP 661, Passe de Canala, 21°05’S, 165°50’E, 166°39’E, 550-580 m, 1 dd .

DISTRIBUTION. — Global distribution: Tasman Sea, New Zealand (shells in 2470 m), northeastern Australia (904- 1141 m, Lamprell & Healy 1998, as D. lessoni ), Philippines (shells in 2050 m), Madagascar (live in 1300-1480 m) and New Caledonia. Distribution in the New Caledonian region: east coast of New Caledonia, Loyalty Basin and Loyalty Ridge, live in 860-2100 m.

REMARKS. — Lamprell & Healy (1998) referred their material from northeastern Australia to Dentalium lessoni Deshayes, 1825 . The type series of Dentalium lessoni from New Guinea is in MNHN; the lectotype (20.3 mm in length) was designated by Scarabino (1995). As suggested by Steiner & Kabat (2004: 610) it is improbable that Deshayes had access to deep-sea specimens, and D. lessoni is considered to be a shallow-water species. According to my information and the literature, Pertusiconcha tridentata prefers deep-water environments, with a known live range from 860 to 2100 m. Lamprell & Healy (1998) mentioned 2 specimens gathered off Cairns, Northern Queensland, Australia, in 904-916 m and 1141 m. I have not examined their specimens but I suggest a misidentification since their photo (fig. 30F) and drawing (fig. 29F) clearly show that the material belongs to P. tridentata .