Rhamdia is a genus of three-barbeled catfishes found in Mexico, Central and South America. These catfishes are nocturnal, opportunistic carnivores, found in a wide range of freshwater habitats. This genus includes a number of troglobitic members, encompassing a number of taxa, including R. enfurnada, R. guasarensis, R. laluchensis, R. laticauda, R. macuspanensis, R. quelen, R. reddelli and R. zongolicensis. In a few of these only some of their populations are troglobitic.

Species: There are currently 27 recognized species in this genus:

• Rhamdia branneri Haseman, 1911
• Rhamdia cinerascens (Günther, 1860)
• Rhamdia enfurnada Bichuette & Trajano, 2005
• Rhamdia eurycephala Angrizani & Malabarba, 2018
• Rhamdia foina (J. P. Müller & Troschel, 1849)
• Rhamdia gabrielae Angrizani & Malabarba, 2018
• Rhamdia guasarensis DoNascimiento, Provenzano & Lundberg, 2004
• Rhamdia guatemalensis (Günther, 1864)
• Rhamdia humilis (Günther, 1864)
• Rhamdia itacaiunas Silfvergrip, 1996
• Rhamdia jequitinhonha Silfvergrip, 1996
• Rhamdia laluchensis A. Weber, Allegrucci & Sbordoni, 2003 (La Lucha blind catfish)
• Rhamdia laticauda (Kner, 1858) (File-spine chulín)
• Rhamdia laukidi Bleeker, 1858
• Rhamdia macuspanensis A. Weber & Wilkens, 1998 (Olmec blind catfish)
• Rhamdia muelleri (Günther, 1864)
• Rhamdia nicaraguensis (Günther, 1864)
• Rhamdia parryi C. H. Eigenmann & R. S. Eigenmann, 1888 (Tonala catfish)
• Rhamdia parvus (Boulenger, 1898)
• Rhamdia poeyi C. H. Eigenmann & R. S. Eigenmann, 1888
• Rhamdia quelen (Quoy & Gaimard, 1824) (Silver catfish)
• Rhamdia reddelli R. R. Miller, 1984 (Blind-whiskered catfish)
• Rhamdia saijaensis Rendahl (de), 1941
• Rhamdia schomburgkii Bleeker, 1858
• Rhamdia velifer (Humboldt, 1821) Incertae sedis
• Rhamdia voulezi Haseman, 1911
• Rhamdia xetequepeque Silfvergrip, 1996
• Rhamdia zongolicensis Wilkens, 1993 (Zongolica catfish)