Anderssonia sphinx Strebel, 1908: 12

Anderssonia sphinx Strebel, 1908: 12 View in CoL , pl. 2, fig. 21.

Type locality: Cape Adare, Ross Sea; 40 m depth.

Diagnosis: Shell external, globose, thin; apical area flattened, with large aperture. Broad cephalic shield, posterolateral cephalic lobes present. Tentacular processes absent. Parapodia absent. External sperm groove present, running laterally on right side of body from gonopore to penial aperture. Pedal gland furrow present in midfoot section. Radular formula: 0.1.0. Sharp unicuspidated rachidian teeth with two to five denticles along sides. Jaws and gizzard plates absent. Cuticularized and spinous gizzard. Male reproductive system tubular; prostate short; penial papilla bilobed. Two gills; one lying on roof and one on floor of mantle cavity. Two repugnatorial glands present, one placed on left anterolateral side, the other on right posterolateral side right after mantle cavity (infrapallial lobe).

Material examined ( Fig. 1): Off Adélie Land, 66°1 ′ S, 140°00 ′ E, 15 January 2008, 196 m depth, 1 spc. dissected and sequenced, MNHN, Paris IM-2009-8030, H = 31 mm GoogleMaps ; 66°33 ′ S, 140°51 ′ E, 13 January 2008, 361 m depth, 1 spc. dissected and sequenced, MNHN, Paris IM-2009-8042, H = 38 mm GoogleMaps ; 66°34 ′ S, 141°18 ′ E, 13 January 2008, 199 m depth, 1 spc., MNHN, Paris IM-2009-8032, H = 36.4 mm GoogleMaps ; 66°34 ′ S, 141°18 ′ E, 13 January 2008, 199 m depth, 1 spc., MNHN, Paris IM-2009-8035, H = 17.7 mm GoogleMaps ; 66°33 ′ S, 140°51 ′ E, 13 January 2008, 361 m depth, 1 spc., MNHN, Paris IM-2009-8041, H = 36 mm. Weddell Sea, Austasen Bank GoogleMaps , 70°57 ′ 6 ″ S, 10°33 ′ 31 ″ W, 22 December 2003, 337 m depth, 1 spc. dissected and sequenced, ZMBN 116995 View Materials , H = 38 mm GoogleMaps ; 70°56 ′ 40 ″ S, 10°32 ′ 3 ″ W, 13 December 2003, 302 m, 1 spc. dissected, ZMBN 116997 View Materials , H = 15 mm GoogleMaps .

Shell ( Fig. 2A–D): Maximum H = 38 mm. External; thin, white, globose; aperture wide, strongly oblique to shell axis; covering whole viscera; protoconch notprotruding; spire short; sculpture consisting of faint parallel spiral lines and thin transverse lines ( Fig. 2D);

umbilicus absent; thin, unornamented lip, parietal callus absent; thin, translucent, yellowish periostracum.