Leptochiton longisetosus Sigwart & Sirenko, 2012

(Figs 16–18, 36D)

Leptосhitоn n. sp. 5 Sigwаrt 2009а: tаble 2, fig. 2; Sigwаrt et аl. 2011: tаble 3, fig. 2.

Leptосhitоn lоngisetоsus Sigwаrt & Sirenko 2012: 20, figs 4E, 13, 14.

Type material. Holotype (MNHN 23699), 40 paratypes (MNHM 23700) and 1 paratype (ZISP).

Type locality. Vanuatu, Sanma, Espiritu Santo Island, Big Bay, 15°S 166.86°E, 551–750 m; Boa 1, stn CP2429.

Material examined. One paratype (ZISP 2188); Taiwan, Bashi channel, N/O Fishery Researcher 1,” TAIWAN 2000”, stn CP38, 21°32.1’N, 120°48.1’E, 1314–1317 m, more than 300 spms, BL 3.0–15.0 mm, 0 1.08.2000.

Distribution. This species is locally abundant and common in Vanuatu (492–777 m), Solomon Islands (650– 1000 m) (Sigwart & Sirenko 2012) and near Taiwan (1314–1317 m). It is found living and feeding on sunken terrestrial plant remains. The new Taiwan record extends the distribution and depth range of this species considerably

Remarks. The Taiwan specimens are very similar in sculpture of tegmentum, scales of girdle and teeth of radula to the type specimens from Vanuatu. However, they differ from the types by having shorter intersegmental bristles. The Taiwan specimens are also similar to Leptochiton schwabei Sigwart & Sirenko, 2012, but differ from them in having fewer micraesthetes pores.