Dolophonodus Branson, 1932[1] Arctacanthus is an extinct genus of cartilaginous fish from the Permian and possibly Triassic periods.

They are known only by isolated hook-shaped "ichthyoliths" thought to represent dermal denticles of a chimaeran.

Similar ichthyoliths of much smaller size have been found in Japan and China in rocks of Anisian age.

The large difference in age, location, and size means their attribution to this genus is uncertain; nonetheless, the species A. exiguus was named in Japan.

This article about a prehistoric cartilaginous fish is a stub.