Cephalosilurus is a small genus of catfishes (order Siluriformes) of the family Pseudopimelodidae.

[1] As of 2012, there were currently four recognized species in this genus:[2] With the reclassification in 2021, they became L. albomarginatus, L. apurensis, L. fowleri, and L.

[6] C. albomarginatus is known to occur over sand and gravel partially covered with mud, leaves and dead wood.

[3] C. nigricaudus occurs in pools and in the backwater of rapids and fast streams with sand, rocks, and decaying wood on the bottom; it is found together with Bryconops caudomaculatus, Characidium blennoides, Pimelodella cristata, Leporinus friderici and Astyanax meunieri.

Though large, it is sedentary and does not require as much room as a similarly-sized active species of fish might.