The giant Atlas barbel (Atlantor reinii) was a ray-finned fish species in the family Cyprinidae.

It was previously considered to be fairly close to the core group around the typical barbels (Barbus, Luciobarbus and Messinobarbus).

It was also thought to be closer still to Carasobarbus and the yellowfish (Labeobarbus), and to be either a lineage of the former, or part of a distinct genus, or included in the latter (maybe together with the former).

[5] However, in 2023 this taxon was reclassified in the monospecific genus Atlantor within the subfamily Torinae.

[3] The specific name honours the geographer, author and traveler Johannes Justus Rein (1835-1918), who, with Karl von Fritsch, collected the type[6] from the Tensift River in Morocco.