infernalis, Pluto Hubbs [C. L.] 1938:292, Pl. 4 [Carnegie Institution of Washington Publications No. 491 (art. 21); ref. 2248] Hoctun Cave at Hoctun, between Merida and Chichen Itza, Yucatán, Mexico. Holotype (unique): UMMZ 116093. •Valid as Ophisternon infernale (Hubbs 1938) -- (Rosen & Greenwood 1976:52 [ref. 7094], Gamboa Pérez 1992:320 [ref. 38704], Espinosa Pérez et al. 1993:62 [ref. 22290], Romero & Paulson 2001:34 [ref. 26040], Kullander in Reis et al. 2003:594 [ref. 27061], Nelson et al. 2004:113 [ref. 27807], Miller 2006:323 [ref. 28615], Proudlove 2006:183 [ref. 28992], Page et al. 2013:115 [ref. 32708], Britz et al. 2022:[2] 244 [ref. 39846], Pérez-Rodríguez et al. 2023:58 [ref. 40739]). Current status: Valid as Ophisternon infernale (Hubbs 1938). Synbranchidae. Distribution: Southern North America: subterranean waters of northern Yucatán Peninsula, Atlantic Slope (Mexico). Habitat: freshwater.