Heteralepas japonica (Aurivillius, 1892) Figure 1

Alepas japonica Aurivillius, 1892: 125. - 1894: 28, pl. II figs 14, 15, pl. VIII, figs 3, 7, pl. IX, fig. 3.

Alepas indica Gruvel, 1901: 259. - 1905a: 162, fig. 179.

Heteralepas (Heteralepas) japonica . - Pilsbry, 1907a: 101.

Heteralepas (Heteralepas) japonica var. alba Krüger, 1911: 34, pl. 1, fig. 2b.

Heteralepas (Heteralepas) dubia Broch, 1922: 288, fig. 38.

Heteralepas japonica . - Pilsbry 1911: 71, fig. 4. - Zevina et al. 1992: 31, fig. 19. - Chan et al. 2009a: 61. - Chan et al. 2009b: 88-91, figs 2A-D, 3A-D, 4, 5. - Pitriana et al. 2020: 12, fig. 3.

Material examined.

Tanimbar Island: 1 specimen, MNHN-IU-2019-4877, stn. CP 46, 08°01'S, 132°51'E, 271-273 m depth, 29 October 1991.

Diagnosis.

Capitulum rounded, plates absent; wall of capitulum thick; orifice crenulated with no more than two crests on carinal region; cirrus VI with caudal appendage; maxillule strongly notched.

Description.

Capitulum and peduncle yellowish. Orifice slightly protuberant, crenulated, occupying one half to one third capitular length, parallel to or at oblique angle to capitulum; integument thick, chitinous. Cirrus I with anterior rami (20-segmented) shorter than posterior rami (25-segmented); cirrus VI with long caudal appendage, 24-segmented, 2/3 length of anterior ramus. Mandibles with four large teeth excluding inferior angle; maxillule strongly notched, two large setae at upper angle, blade-shaped setae on cutting margin; labrum concave with numerous teeth. Measurements of specimen: height of capitulum 18.50 mm, width 12.82 mm, thickness 5.97 mm; length of peduncle 15.26 mm, width 5.55 mm.

Distribution.

Singapore; Indo-west Pacific: Indian Ocean; Australia; Malay Archipelago; Vietnam; Condor Island; South China Sea; East China Sea; Taiwan, Philippines; South Japan; NE New Zealand; fouling hard rock substrata, crabs, gorgonians, antipatharians, deep-sea cables; 48-500 m depth (Jones and Hosie 2016). Recently, the species has also been recorded from the Lifamatola Sea and the Halmahera Sea, Indonesia (Pitriana et al. 2020). In this study, Heteralepas japonica was found at Tanimbar Island, Indonesia.

Type locality.

Hirado Strait, Japan, 146 m depth (Aurivillius 1892).