 There are three other species in this genus, "Campostoma anomalum" (the central stoneroller), "Campostoma oligolepis" (the largescale stoneroller), and "Campostoma pauciradii" (the bluefin stoneroller), which are morphologically similar.The Mexican stoneroller has a very stout body with a very large head and snout.The mouth is unique in that its teeth have cartilaginous sheaths, while the size of its mouth is usually very small.