Acestridium colombiense Retzer 2005

Distinguished from its congeners by a unique combination of characters: two unpaired median pre-dorsal plates, body width 10.0-13.0% of post-dorsal fin length, inter-orbital distance between 10.6-13.0% of post-dorsal fin length, inter-orbital distance between 25.0-29.0% of eye-to-dorsal fin length; low number of jaw teeth (12-15 teeth in upper left jaw, 9-13 in lower left jaw), and pre-dorsal fin body pigmentation not formed into distinct lines between longitudinal rows of odontodes (Ref. 54475).

Acestridium colombiense is a species of armored catfish endemic to Colombia. It is only known from the Inírida River, Guainía Department in the east of Colombia.

Like all Acestridium species, this is a very slender and elongated fish. Specimens of up to 4.9 centimetres (1.9 in) SL have been recorded. It can most readily distinguished from its congeners by its rather homogenous brown coloration (as opposed to having striped markings) and the very low number of jaw teeth.