Species that contain: Gymnothorax and richardsoni [ 2 ] records

richardsonii, Muraena Bleeker [P.] 1852:296 [Natuurkundig Tijdschrift voor Nederlandsch Indië v. 3 (no. 2); ref. 16825] Wahai, northern Ceram and Padang, western Sumatra, Indonesia. Lectotype: RMNH 7201. Paralectotypes: RMNH (1). Bleeker specimens: BMNH 1867.11.28.267 (1) Type catalog: Böhlke & Smith 2002:145 [ref. 26380]. Lectotype selected by Böhlke & Smith 2002:145 [ref. 26380]. Muraena richardsonii and M. ceramensis were described in the same publication; Günther 1870:118 serves as first reviser selecting richardsonii over ceramensis.3 •Valid as Gymnothorax richardsonii (Bleeker 1852) -- (Castle & McCosker 1986:172 [ref. 5645], Hatooka in Masuda et al. 1984:25 [ref. 6441] as richardsoni, Hatooka 1986:379 [ref. 22522] as richardsoni, Chen et al. 1994:52 [ref. 22258] as richardsoni, Allen 1997:54 [ref. 23977] as richardsoni, Chen et al. 1997:21 [ref. 26476] as richardsoni, Myers 1999:50 [ref. 23965] as richardsoni, Fricke 1999:52 [ref. 24106], Böhlke et al. 1999:1657 [ref. 24692] as richardsoni, Nakabo 2000:206 [ref. 25086] as richardsoni, Compagno in Randall & Lim 2000:585 [ref. 25122] as richardsoni, Sadovy & Cornish 2000:34 [ref. 25480] as richardsoni, Kimura & Peristiwady in Matsuura & Peristiwady 2000:109 [ref. 27511] as richardsoni, Nakabo 2002:206 [ref. 26001] as richardsoni, Böhlke & Smith 2002:145 [ref. 26380], Allen & Adrim 2003:23 [ref. 26830] as richardsoni, Myers & Donaldson 2003:611 [ref. 27495] as richardsoni, Kimura et al. in Kimura & Matsuura 2003:11 [ref. 27510], Randall et al. 2004:7 [ref. 27624], Randall 2005:47 [ref. 28239], Imamura 2009:20 [ref. 30434] as richardsoni, Zhang et al. 2010:275 [ref. 31511] as richardsoni, Fricke et al. 2011:350 [ref. 31242], Allen & Erdmann 2012:93 [ref. 31980], Smith 2012:26 [ref. 32155], Fricke et al. 2014:20 [ref. 33932], Ho et al. 2015:160 [ref. 34130], Koeda et al. 2016:8 [ref. 35333], Fricke et al. 2018:39 [ref. 35805], Allen et al. 2018:46 [ref. 36275], Fricke et al. 2019:52 [ref. 36673], Zajonz et al. 2019:62 [ref. 36871], Eudeline 2022:143 [ref. 39191], Smith & Böhlke 2022:63 [ref. 39681], Allen & Erdmann 2024:103 [ref. 40796]). Current status: Valid as Gymnothorax richardsonii (Bleeker 1852). Muraenidae: Muraeninae. Distribution: Indo-West Pacific: East Africa, Socotra (Yemen), Seychelles, Mayotte (France), Madagascar and Mascarenes (Mauritius) east to Society Islands (French Polynesia), north to Ryukyu Islands and Ogasawara Islands (Japan), south to New Caledonia and Cook Islands. Habitat: brackish, marine.

ypsilon, Gymnothorax Hatooka [K.] & Randall [J. E.] 1992:183, Figs. 1-2 [Japanese Journal of Ichthyology v. 39 (no. 3); ref. 20258] Near Uotsurijima Island, Senkaku Islands, Japan. Holotype: URM-P 1783. Paratypes: BPBM 9643 (4); FAKU 51430 (1, dissected), 51604 (1), 100530 (1); SMBL 73341 [not seen at FAKU] (1); ZUMT 55591 (1), 55594 (1). Type catalog: Böhlke & Smith 2002:156 [ref. 26380], Aizawa et al. 2022:143 [ref. 39647]. •Synonym of Gymnothorax richardsoni (Bleeker 1852) -- (Zhang et al. 2010:275 [ref. 31511]). •Valid as Gymnothorax ypsilon Hatooka & Randall 1992 -- (Böhlke & Randall 2000:260 [ref. 24493], Nakabo 2000:204 [ref. 25086], Nakabo 2002:204 [ref. 26001], Böhlke & Smith 2002:156 [ref. 26380], Mundy & Parrish 2004:412 [ref. 27877], Shinohara et al. 2005:399 [ref. 28370], Mundy 2005:125 [ref. 28379], McCosker & Stewart 2006:87 [ref. 28702], Randall 2007:94 [ref. 30952], Smith 2012:29 [ref. 32155], Duffy & Ahyong 2015:108 [ref. 36167], Ho et al. 2015:162 [ref. 34130], Stewart & McCosker 2015:237 [ref. 34233], Ramos-Castro et al. 2020:83 [ref. 37651], Koeda et al. 2021:5 [ref. 38857], Smith & Böhlke 2022:66 [ref. 39681]). Current status: Valid as Gymnothorax ypsilon Hatooka & Randall 1992. Muraenidae: Muraeninae. Distribution: Indo-Pacific: Mascarene Ridge; Taiwan, Ryukyu Islands, southern Japan and Ogasawara Islands; Hawaiian Islands and New Zealand EEZ, Kermadec Islands. Habitat: marine.