A group of lobed finned fishes belonging to the order Dipnoi (See Classification, Osteichthyes, Crossopterygii). They flourished during the Paleozoic but are now represented by only three genera, Lepidosiren of South America, Neoceratodus of Australia, and Protopterus of Africa. P. aethiopicus has a C value of 127 gbp of DNA, a record for an animal. Lungfish have gills and also lungs and can breathe air.
Subjects: Genetics and Genomics.