Rhinodipterus is an extinct genus of prehistoric dipnoan sarcopterygians or lobe-finned fish, that lived in the Devonian Period, between 416 and 359 million years ago.

It is believed to have inhabited shallow, salt-water reefs,[1] and is one of the earliest known examples of marine lungfish.

Research based on an exceptionally well-preserved specimen from the Gogo Formation of Australia[2] has shown that Rhinodipterus has cranial ribs attached to its braincase and was probably adapted for air-breathing to some degree as living lungfish are.

[3] This could be the only case known for a marine lungfish with air-breathing adaptations.

This article about a prehistoric lobe-finned fish is a stub.