What is "rhamdia"

Rhamdia is a genus of three-barbeled catfishes found in Mexico, Central and South America. These catfishes are nocturnal, opportunistic carnivores. This genus includes a number of troglobitic members, encompassing a number of taxa, including R. laluchensis, R. laticauda, R. macuspanensis, R. quelen, R. reddelli and R. enfurnada.