Copionodon is a genus of freshwater ray-finned fishes belonging to the family Trichomycteridae and the subfamily Copionodontinae, the Chapada pencil catfishes. These fishes are endemic to Brazil.
There are currently five recognized species in this genus:
C. orthiocarinatus and C. pecten originate from the Mucujê River, a tributary of Paraguaçu River in Bahia, Brazil. C. lianae originates from the Grisante River, a tributary of the Mucujê River.
Copionodon species grow to about SL.