Gnathophis heterognathos (Bleeker, 1858)

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Myrophis heterognathos Bleeker, 1858b:9, pl. 3, fig. 1 (type locality: Nagasaki, Japan).

Gnathophis heterognathos (Bleeker, 1858): Kaup, 1859:7; Castle, 1963:17.

Rhynchocymba nystromi (Jordan & Snyder, 1901): Chen & Weng, 1967:51; Chen, 1969:132; Shen 1984a:112; Chen & Yu, 1986:252.

Rhynchocymba nystromi nystromi (Jordan & Snyder, 1901): Chu, 1957:14; Liang & Yeh, 1964:8; Lee & Yang, 1966:57, fig. 6; Shao et al., 2008:239.

Gnathophis nystromi (Jordan & Snyder, 1901): Shen, 1988:15; Shao et al., 1994a:274; Chen, 2004:32.

Gnathophis nystromi ginanago (Asano, 1958):? Shao et al., 1994a:274.

Remarks. This species was referred to Gnathophis nystromi in most previous works. However, Castle (1963) first suggested and Karmovskaya (2004) later confirmed that G. n y s t ro m i is a junior synonym of G. heterognathos, which has not previously been used for the Taiwanese specimens.