Rineloricaria magdalenaeis a species of freshwater ray-finned fish belonging to the family Loricariidae, the suckermouth armored catfishes, and the subfamily Loricariinae, the mailed catfishes. This catfish occurs in the Magdalena-Cauca drainage basin in Colmbia, it may also occur in the Lake Maracaibo drainage system in Colombia and Venezuela but this needs confirmation. It is typically found in slow-flowing rivers, as well as marshes and swamps. The species reaches in length and is believed to be a facultative air-breather.