Copionodon is a genus of catfishes (order Siluriformes) of the family Trichomycteridae. It includes three species, C. lianae, C. orthiocarinatus, and C. pecten.
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.[2]