ceratodus

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. Any of various extinct lungfishes of the genus Ceratodus, of the Triassic and Cretaceous periods.
2. n. See barramunda.

Century Dictionary and Cyclopedia

1. n. The typical genus of the family Ceratodontidæ: so called from the horn-like ridges of the teeth. Ceratodus forsteri is the barramunda of Australia, sometimes called the native salmon. It is from 3 to 6 feet long, and its body is covered with cycloid scales. The head is wide and bony, the dorsal and anal fins are confluent with the caudal, and the pectoral and ventral paddle-like, but pointed at the ends. The dentition is especially characteristic; in each jaw is a lateral molar with transverse ridges diverging outward, and in advance of the palatal ones are incisor-like teeth. The family is remarkable for its antiquity, having survived from the Triassic and Jurassic periods to the present time. In the early ages it was widely distributed, but it is now represented by only one or two fresh-water species in Australia.

GNU Webster's 1913

1. n. (Zoöl.) A genus of ganoid fishes, of the order Dipnoi, first known as Mesozoic fossil fishes; but recently two living species have been discovered in Australian rivers. They have lungs so well developed that they can leave the water and breathe in air. In Australia they are called salmon and baramunda. See dipnoi, and archipterygium.

WordNet 3.0

1. n. extinct lungfish