Ophisternon aenigmaticum Rosen & Greenwood, 1976 .

Obscure Swamp Eel; Anguila, Anguila de Pantano, Anguila de Suampo, Anguila de Lodo, Anévila, Anguila Falsa, Culebra, Anguila de Pantano Oscura.

Distribution: Global: North America; from southern Mexico to northern Costa Rica, including Cuba and Trinidad and Tobago, Atlantic drainages; Costa Rica: RF (Atlantic), 43 m. a.s.l., Sec, Pot.

Occurrence and conservation status: Nat, LC.

References: Angulo et al. (2013: 998; listed, including taxonomic information and distributional data).