Bathycadulus hendersoni, Scarabino, Victor, Caetano, Carlos Henrique Soares & Carranza, Alvar, 2011

Scarabino, Victor, Caetano, Carlos Henrique Soares & Carranza, Alvar, 2011, Three new species of the deep-water genus Bathycadulus (Mollusca, Scaphopoda, Gadilidae), Zootaxa 3096, pp. 59-63 : 60

Bathycadulus hendersoni new species

Figs 5, 6

Type material. Holotype (dd) MCZ 293930; 3 Paratypes: 1 (dd) MCZ 293931, 1 (dd) MCZ 293932; 1 (lv) MNHN 24344.

Type locality. Equatorial mid Atlantic, 0 0°03' S, 27°48' W; 3730−3783 m [R/V ATLANTIS II, cruise 31, stn 155]

Distribution. Equatorial mid Atlantic, North American basins, West European Basin. Live specimens from 3730 m; empty shells from 4120 to 3753 m.

Description. Shell 6.6 mm long, brilliant, porcellaneous white. Maximum diameter located in 3/5 medial portion of shell, both sides parallel in dorsal view. Shell tapers rapidly from maximum diameter to apex and mouth. Dorsal side sinusoidal with two bulges, one at posterior fourth rapidly tapering to apex; other, less evident at anterior fourth, concave central area in lateral view. Apex simple, thin bordered, slightly dorsoventrally compressed, prominent pre-apical internal callus present. Oral aperture simple, slightly compressed laterally.

Material examined. Atlantic Ocean: North American basin: R/V ATLANTIS II: cruise 17, stn 95, 38°33'N, 68°32'W, 3753 m, 3 dd (Paratypes); Equatorial mid-Atlantic: R/V ATLANTIS II: cruise 31, stn 155, 0 0°03'S, 27°48'W, 3730−3783 m, 1 dd (Holotype) and 1 lv (Paratype); West European Basin: R/V CHAIN: cruise 106, stn 326, 52°10'N, 15°32'W, 4120− 4100 m, 1 dd (Paratype).

Remarks. Bathycadulus hendersoni is smaller and has the apical and oral constrictions more pronounced compared to B. segonzaci .

Etymology. Species dedicated to John B. Henderson, Jr. (1870–1923) for his contribution to the knowledge of the West Atlantic scaphopods.

Figures

FIGURE 1 − 12. Genus Bathycadulus and Cadulus. (1 − 2) B. fabrizioi Scarabino, 1995 (Paratype MNHN), (1) lateral view and (2) dorsal view; (3 − 4) B. queirosi n. sp. (Holotype MNHN), (3) lateral view and (4) dorsal view; (5 − 6) B. hendersoni n. sp. (Holotype MCZ, 6.6 mm), (5) lateral view and (6) dorsal view; (7 − 8) B. segonzaci n. sp. (Holotype MNHN, 8.7 mm), (7) lateral view and (8) dorsal view; (9 − 10) Radula of B. segonzaci, (9) whole and (10) details of rachidian and lateral teeth; (11 − 12) Cadulus cylindratus Jeffreys 1877, (specimen from MNHN collection), Gulf of Gascony, 47 º 30 ' 6 N, 09 º 37 ' 1 W, 4281 m), (11) lateral view and (12) dorsal view. Scale bars: (9) 100 µm; (10) 20 µm.