Episiphon wallisi, Scarabino & Scarabino, 2010

Scarabino, Victor & Scarabino, Fabrizio, 2010, A new genus and thirteen new species of Scaphopoda (Mollusca) from the tropical Pacific Ocean, Zoosystema 32 (3), pp. 409-423 : 416

Episiphon wallisi n. sp.

( Fig. 3 A-D)

TYPE MATERIAL. — Wallis Island. MUSORSTOM 7, stn DW 604, 13°21’S, 176°08’W, 415-420 m, 1 lv holotype ( MNHN 22784 ) ; 2 lv paratypes ( MNHN 22785 ) .

TYPE LOCALITY. — Wallis Island, 13°21’S, 176°08’W, 415-420 m (MUSORSTOM 7, stn DW 604).

ETYMOLOGY. — Named from the type locality.

OTHER MATERIAL EXAMINED. — Wallis Island. MUS ORSTOM 7, stn DW 523, 13°12’S, 176°16’W, 455- 515 m 2 lv, 5 dd. — Stn DW 601, 13°19’S, 176°17’W, 350 m, 14 lv, 18 dd. — Stn DW 604, 13°21’S, 176°08’W, 415-420 m, 5 lv, 22 dd.

DISTRIBUTION. — Wallis Island. Live at 350- 415 m.

DESCRIPTION

Shell 6.4 mm long, regularly curved with arc located at the centre of shell, slowly tapering, translucent white. Longitudinally sculptured with 24 fine primary striae and secondary ones on the posterior third. Apex simple, slightly dorsoventrally depressed, callus flat, lumen circular, central. Anterior aperture oblique, thin-walled, slightly depressed dorsoventrally.

Measurements of holotype: L 6.4, W 0.57-0.54, w 0.4, arc 0.54 at 3.2 from apex.

REMARKS

See Remarks for Episiphon joanae n. sp. below.

Figures

FIG. 3. — A-D, Episiphon wallisi n. sp. holotype (6.5 mm), Wallis Island, 13°21’S, 176°08’W, 415-420 m (MUSORSTOM 7 stn DW 604);A, lateral view of shell; B, dorsal view of shell; C, frontal view of apex; D, sculpture at the posterior third of shell; E-G, Episiphon indefensum n. sp. holotype (7.9 mm), Solomon Islands, 8°47’S, 157°38’E, 762-1060 m (SALOMON 2 stn CP 2182); E, lateral view of shell; F, dorso-frontal view of apical area; G, sculpture at the middle of shell; H, I, Episiphon joanae n. sp. holotype (7 mm), Fiji, Ride de Lau, 18°43’S, 178°23’W, 392-407 m (BORDAU 1 stn DW 1469); H, lateral view of shell; I, latero-dorsal view of apical area; J, Episiphon joanae n. sp., radula, rachidian and lateral teeth; K, L, Episiphon lacteum n. sp. holotype (16 mm), Waterwitch Bank, Wallis Island, 12°31’S, 176°40’W, 275-295 m (MUSORSTOM 7 stn DW 538); K, lateral-dorsal view of apical area; L, lateral view of shell. Scale bars: F, G, I, K, 100 μm; J, 10 μm.