Placiphorella stimpsoni (Gould, 1859)

(Fig. 4B)

Chiton (Molpalia) stimpsoni Gould 1859: 165 . Langfordiella japonica Dall 1925: 96 . Placiphorella japonica; Is. Taki 1962: 34; Iw. Taki 1964b: 411; Ma 2004: 3, pl. 1, fig. C. Placiphorella stimpsoni; Saito & Okutani 1989: 219, figs 28–46, 50–52 (bibliography and synonymy); Dell’Angelo et al. 1990:

43, pl. 4, figs 1–3; Bullock & Harper 1994: 41, pls. 11F 12E, F, 13A; Kaas & Van Belle 1994: 336, fig. 136, map 55; Clark

1994: 308; Saito 1995: 107; 1998: 153; 2000: 17, pl. 8, fig. 7; 2001: 199, fig. 13; 2006: 215; 2017: 53, 736, pl. 9, fig. 5; Xu

2008: 458. Non: Placiphorella stimpsoni; Dall 1886 (pars) et auct. (= Placiphorella borealijaponica Saito & Okutani, 1989). Non: Placiphorella stimpsoni; Dall 1921: 197; Oldroyd 1927: 316. (= Placiphorella velata Carpenter MS, Dall, 1879).

Type material. Syntypes USNM 1646. Type locality. Japan, Hakodadi Bay, 45 m. Material examined. South China Sea, Hainan Island, Sanya, 55M-443, 1 spm, BL 25.0 mm, 0 6.04.1955 Distribution. Japan, southern and western shores of Korea, Taiwan, Hong Kong and Hainan. Remarks. For a long time it was believed that this species occurs in the sea of Japan and near Hokkaido (Is. Taki 1938; Jakovleva 1952; Sirenko 1976b). However, Saito & Okutani (1989) found another species P. borealijaponica occurs there.