Calliodentalium crocinum (Dall, 1907)

Scarabino, Victor, 2008, New species and new records of scaphopods from New Caledonia, Mémoires du Muséum national d'Histoire naturelle 196, pp. 215-268 : 234

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Calliodentalium crocinum (Dall, 1907)


Calliodentalium crocinum (Dall, 1907)

Fig. 5b

Calliodentalium crocinum - Scarabino 1995: 274, figs 80, 88b. No material cited from New Caledonia.

Laevidentalium crocinum - Lamprell & Healy 1998: 121, figs 121E, 125D-E, 127, 129E-F.

NEW MATERIAL EXAMINED. — North of New Caledonia. Passe de Cap Baye, 20°57’S, 165°35’E, 160-222 m, 10 lv, 34 dd; BATHUS 4: stn DW 898, Passe de Poum, 20°17’S, 163°50’E, stn DE 705, 21°02’S, 165°38’E, 350-400 m, 1 dd; stn CP 712, 500- 600 m, 1 lv, 13 dd. 21°44’S, 166°35’E, 210 m, 4 dd; stn CP 713, Passe SE de Ngoe, New Caledonia proper. BATHUS 1: stn DW 641, Passe du 21°45’S, 166°37’E, 250 m, 1 lv, 3 dd GoogleMaps . — BATHUS 4: stn DW 885, Kouakoué , 21°52’S, 166°49’E, 240-258 m, 1 dd; stn DW 653, Passe de St Vincent, 22°05’S, 165°58’E, 250-300 m, 3 dd; stn Passe de Canala, 21°17’S, 165°57’E, 190-207 m, 1 dd; stn CP CP 953, Passe du Solitaire, 21°45’S, 166°36’E, 220-234 m, 1 dd; 654, 21°17’S, 165°57’E, 237-298 m, 2 dd; stn CP 668, Passe de stn CP 954, 21°44’S, 166°36’E, 255- 250 m, 1 dd; stn CP 955, Cap Baye, 20°57’S, 165°35’E, 205-219 m, 1 lv: stn CP 695, Passe 21°46’S, 166°37’E, 242-250 m, 2 dd GoogleMaps .

de Hienghène, 20°35’S, 164°58’E, 410-430 m, 1 dd; stn DE 700,

DISTRIBUTION. — Global distribution: Japan, Philippines, live in 196-266 m (Scarabino 1995), and New Caledonia, live in 219-500 m. Distribution in the New Caledonian region : north coast: Passe de Poum; all along the east coast; southwest coast. First record for New Caledonia .

REMARKS. — Lamprell & Healy (1998) did not agree with the placement of this species in Calliodentalium because they argued that the radula did not conform to the Calliodentalium formula (1-1-1-1-1-1). Live material collected by the MNHN expeditions now confirms that this species does indeed have the Calliodentalium radula type. Lamprell & Healy’s SEM photos of the radula show the characteristic shape of the lateral teeth as well as the long marginal ones, distinguishing it from the Laevidentalium type. Also, particularly in fig. 129 E of Lamprell & Healy (1988), the contact area of the two subrachidian denticles with the rachidians can be seen. This emphasizes that, when studying scaphopods, it is essential to study the diverse radular teeth individually, rather than the radula as a whole with the teeth in their normal position, as is usual in the literature.