Spatuloricaria gymnogaster is a species of is 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 upper Magdalena River basin in Colombia.
FishBase records a maximum standard length of for the species, but this is unlikely and can be assumed to be a misprint, with being the actual upper bound stated in the reference cited. Some sources list a standard length of for Spatuloricaria gymnogaster, and FishBase provides a maximum weight of 235.3 g.
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