Species that contain: Gnathophis and heterognathos [ 3 ] records

ginanago, Rhynchocymba nystromi Asano [H.] 1958:197 [English p. 200], Fig. 1 [Dobutsugaku Zasshi = Zoological Magazine Tokyo v. 67 (no. 7); ref. 12046] Off Owashi, Mie Prefecture, Japan. Holotype: FAKU 21440. Paratypes: FAKU 2045-47 (3), 2110 (1), 7701 (1), 19019 (1), 19030 (1), 19843 (1), 14989-91 (3), 15078-80 (3), 15082-84 (3), 21439 (1), 21443 (1), 23903-07 (5), 24675 (1). Based on Hatooka in Nakabo 2013. •Synonym of Gnathophis nystromi (Jordan & Snyder 1901), but a valid subspecies as described -- (Asano in Masuda et al. 1984:28 [ref. 6441], Nakabo 2000:230 [ref. 25086], Shinohara et al. 2001:294 [ref. 25995], Nakabo 2002:230 [ref. 26001], Shinohara et al. 2005:401 [ref. 28370]). •Possibly a synonym of Gnathophis heterognathos (Bleeker 1858) -- (Smith 1989:521 [ref. 13285]). •Synonym of Gnathophis heterognathos (Bleeker 1858) -- (Karmovskaya 2004:S15 [ref. 28053]). •Valid as Gnathopis ginanago (Asano 1958) -- (Shinohara et al. 2014:237 [ref. 33330], Ho et al. 2018:237 [ref. 36049]). Current status: Valid as Gnathophis ginanago (Asano 1958). Congridae: Congrinae. Distribution: Western North Pacific: Japan. Habitat: marine.

heterognathos, Myrophis Bleeker [P.] 1858:9, Pl. 3 (fig. 1) [Acta Societatis Regiae Scientiarum Indo-Neêrlandicae v. 5 (art. 9); ref. 16963] Nagasaki, Japan. Holotype (unique): BMNH 1867.11.28.305. Spelled two ways originally, heterognathos in text (p. 3, 9) and in caption to Pl. 3, as heterognathus in legend on p. 12; latter regarded as a misspelling. •Valid as Gnathophis heterognathos (Bleeker 1858) -- (Smith 1989:521 [ref. 13285], Karmovskaya 2004:S15 [ref. 28053], Ho et al. 2015:147 [ref. 34130], Ho et al. 2018:237 [ref. 36049] as heterognathus, Kim et al. 2020:57 [ref. 39118], Sonoyama et al. 2020:19 [ref. 37637]). Current status: Valid as Gnathophis heterognathos (Bleeker 1858). Congridae: Congrinae. Distribution: Northwestern Pacific: Taiwan to Korea and Japan. Habitat: marine.

nystromi, Leptocephalus Jordan [D. S.] & Snyder [J. O.] 1901:853, Fig. 5 [Proceedings of the United States National Museum v. 23 (no. 1239); ref. 2508] Nagasaki, Japan. Holotype: CAS-SU 6469. Additional material or paratypes: ANSP 26215-16 (2), BMNH 1903.5.14.140 (1), CAS-SU 6969 (1). Type catalog: Böhlke 1953:48 [ref. 12291], Böhlke 1984:65 [ref. 13621]. •Valid as Gnathophis nystromi (Jordan & Snyder 1901) -- (Asano in Masuda et al. 1984:28 [ref. 6441], Mohsin & Ambak 1996:170 [ref. 27969], Smith in Randall & Lim 2000:586 [ref. 25122], Choi et al. 2003:146, 494 [ref. 26218], Zhang et al. 2010:206 [ref. 31511]). •Possibly a synonym of Gnathophis heterognathos (Bleeker 1858) -- (Smith 1989:521 [ref. 13285]). •Valid as Gnathophis nystromi (Jordan & Snyder 1901), subspecies nystromi -- (Lee & Joo 1999:27 [ref. 25724], Nakabo 2000:230 [ref. 25086], Shinohara et al. 2001:294 [ref. 25995], Nakabo 2002:230 [ref. 26001], Mundy 2005:141 [ref. 28379], Shinohara et al. 2011:39 [ref. 31715], Shinohara et al. 2014:237 [ref. 33330]). •Synonym of Gnathophis heterognathos (Bleeker 1858) -- (Karmovskaya 2004:S15 [ref. 28053], Ho et al. 2015:147 [ref. 34130]). Current status: Synonym of Gnathophis heterognathos (Bleeker 1858). Congridae: Congrinae. Distribution: Western North Pacific and central Pacific (Hawaii Ridge) [if valid]. Habitat: marine.