Lungfish are generally believed to have evolved away from regular fish early, and their taxonomy is still in flux; some authors put all lungfishes in a subclass Dipnoi. However, there seems to be agreement that there are two orders.
Order Ceratodontiformes
- Family Ceratodontidae, genus Neoceratodus:
- Australian lungfish[?] Neoceratodus forsteri
Order Lepidosireniformes
- Family Lepidosirenidae, genus Lepidosiren:
- South American lungfish[?] Lepidosiren paradoxa
- Family Protopteridae, genus Protopterus:
- Marbled lungfish[?] Protopterus aethiopicus
- East African lungfish[?] Protopterus amphibius
- African lungfish[?] Protopterus annectens
- Slender lungfish[?] Protopterus dolloi
Lungfish[?] is also a musical band.