27762 Ophisternon aenigmaticum Rosen & Greenwood, 1976 Synbranchidae Swamp-eels Synbranchiformes Teleostei Obscure swamp eel Central America: throughout the Atlantic Slope of Guatemala and Mexico to Cuba. AMNH 24651 Ophisternon aenigmaticum AMNH 30217 1968 Ophisternon aenigmaticum AMNH 32410 1968 Ophisternon aenigmaticum AMNH 31687 1971 Ophisternon aenigmaticum AMNH 38206 1973 Ophisternon aenigmaticum AMNH 32408 1974 Ophisternon aenigmaticum AMNH 35420 1974 Ophisternon aenigmaticum AMNH 96576 1990 Ophisternon aenigmaticum AMNH 96604 1990 Ophisternon aenigmaticum