Nierstraszella lineata (Nierstrasz, 1905)

(Fig. 37H)

Lepidоpleurus lineatus Nierstrаsz, 1905: 8, figs 4, 48–51; 1906: 146, 157; Ferreirа, 1979: 163, figs 23–24; 1980: 59. Leptосhitоn (Leptосhitоn) lineatus; Kааs & Vаn Вelle, 1985: 113, fig. 49, mаps 22, 44.

Nierstraszella lineata; Sirenko, 1992: 84, figs 3–7, 8 А–D, 9; Sigwаrt & Sirenko, 2012: 25 (synonymy).

Type material. Lectotype (ITZ Moll. 3.05.011), designated by Ferreira (1979).

Type locality. Off Roti Island, Indonesia, 10°39’S, 123°40’E, 520 m, R/V Siboga, stn. 297.

Material examined. Taiwan, South China Sea, N/O Fishery Researcher 1, “ TAIWAN 2000”, stn CP19, 22°24.2’N, 120°10.2’E, 468 m, 1 spm, BL 8.0 mm, 29.07.2000; stn CP28, 22°10.6’N, 120°27.6’E, 404 m, 8 spms, BL 5.0–11.0 mm, 30.07.2000; stn CP29, 22°10.2’N, 120°20.8’E, 550 m, 3 spms, BL 7.0–16.0 mm, 30.07.2000; Bashi channel, N/O Fishery Researcher 1, stn CP4, 22°13.3’N, 120°23.5’E, 326 m, 20 spms, BL 1.8–12.0 mm, 30.07.2000.

Distribution. Widely distributed in the Western Pacific, in Japan, Taiwan, Philippines, Indonesia, Vanuatu, Solomon Islands 121–1767 m (Sigwart & Sirenko 2012).

Remarks. Nierstraszella lineata is similar to Leptochiton vietnamensis but differs in having more micraesthetes in each aesthete group, wider apophyses and shorter intermediate valves (Sirenko 2016a). Moreover, the tail valve of L. vietnamensis is always broader than the head valve (vs. the head valve broader than the tail valve in N. lineata). Molecular studies also support a close relationship between these taxa (Sigwart et al. 2011).