Arcania heptacantha De Man, 1907

(Fig. 3 A)

Material examined. 1 male (9.1 mm) (MNHN-IU-2013-458), stn PD14, Madang Harbour, east Nui Is., 05°12.3'S 145°47.9'E, 10–15 m, 11.11.2012; 1 male (10.3 mm) (MNHN-IU-2013-12766), stn PD37, Rempi Area, north Tadwai I., 04°58.5'S 145°47.5'E, 5–10 m, 20.11.2012; 1 male (14.9 mm) (ZRC 2014.0170), stn PD38, Rempi Area, north Tadwai I., 04°58.8'S 145°47.4'E, 10–15 m, 20.11.2012; 1 male (13.9 mm) (MNHN-IU-2013-12769), stn PD40, Rempi Area, east Tadwai I., 04°59.3'S 145°47.7'E, 21.11.2012; 1 immature male (9.4 mm) (MNHN-IU- 2013-12767), 1 immature specimen (6.2 mm) (MNHN-IU-2013-17894), stn PD54, west Panab I., 05°10.3'S 145°48.4'E, 15 m, 28.11.2012; 1 female (13.4 mm) (ZRC 2014.0171), 1 immature specimen (5.7 mm) (MNHN-IU- 2013-17893), stn PD62, north Banap Damon Point, 05°09.8'S 145°48.4'E, 1–3 m, 1.12.2012; 1 immature specimen (4.1 mm) (MNHN-IU-2013-12765), stn PD66, S Yabob I., 05°15.5'S 145°47.3'E, 2–6 m, 3.12.2012; 1 immature specimen (6.4 mm) (MNHN-IU-2013-17895); 4 immature specimens (6.2–9.5 mm) (MNHN-IU-2013-12768); 2 immature specimens (6.9 mm, 6.8 mm) (MNHN-IU-2013-12725), stn PD73, Yomba I., 05°14.7'S 145°47.3'E, 20– 25 m, 6.12.2012.

Colour in life. Carapace and chelipeds pale orange; ambulatory legs, tips of spines, fingers, white (Fig. 3 A). Geographical distribution. Japan, China, Taiwan, Hong Kong, Singapore; 1–150 m (Galil 2001a). New record for Papua New Guinea.