Monobiceros langi Faubel, 1984

Figs 1 C–D, 7E

Pseudoceros maximus Lang, 1884 (in part): 270–271, 543, pl. 30, fig. 17.

Monobiceros langi Faubel, 1984: 215 .

Material examined

CAPE VERDE • 1 spec.; São Vicente Island, Baía das Gatas; 16°54′09.33″ N, 24°54′25.24″ W (Fig. 1C V 2); May 2017; Leopoldo More leg.; RCCN .

MOROCCO • 3 specs; Sidi Ifni; 29°22′58.00″ N, 10°10′37.88″O (Fig. 1D M 2); 2 Sep. 2016; Leopoldo Moro leg.; RCCN .

Distribution

Gulf of Naples, Italy (Lang 1884); Cádiz, Spain (Bahia et al. 2017); Crete, Greece (Bahia et al. 2017).

New records

Baía das Gatas, São Vicente Island, Cape Verde. Sidi Ifni, Morocco. These are the first records outside the Mediterranean Sea.

Description

Body oval and elongated sometimes pear-shaped, with wavy margins and thickened dorsal midline. Length 2.3 cm. The background color varies with transmitted or reflected light. With reflected light, the dorsal surface is chocolate brown, speckled with white patches. Under transmitted light, the pigmentation looks milky brown with dark margins and a dark dorsal midline that delimited the characteristic bulge (Fig. 7E). Dorsal surface smooth. Tentacles formed by simple folds and cone-like in shape. Cerebral eyes form a single large rounded cluster behind the tentacles; frontal eyes scattered between the tentacles. Compact ruffled pharynx located directly behind the cerebral eyes.