| Ceratodontiformes Temporal range:
| |
|---|---|
| |
| Neoceratodus forsteri, a neoceratodontid | |
| |
| Lepidosiren paradoxa, a lepidosirenid | |
Scientific classification 
| |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Rhipidistia |
| Clade: | Dipnomorpha |
| Class: | Dipnoi |
| Order: | Ceratodontiformes Berg, 1940 |
| Type genus | |
| †Ceratodus Agassiz, 1837
| |
| Families | |
|
Several extinct, see text | |
| Synonyms | |
| |
Ceratodontiformes is the only extant order of lungfish, containing the families Neoceratodontidae, Lepidosirenidae, and Protopteridae as well as many other extinct groups. Members of this group are the only lungfish known to have survived the Permian-Triassic extinction event.[1][2]
All lungfish of the order can and often do estivate (except the spotted African lungfish, which can but rarely does so).[3] All members of the order are obligatory air-breathers; only the Australian lungfish has functioning gills when adult; members of the Lepidosirenidae have gills only when they are larvae.[3] The lungfish also all have generally small scales and two lungs as opposed to the Australian lungfish's single lung.[3]
- ^ Kemp, Anne; Cavin, Lionel; Guinot, Guillaume (2017-04-01). "Evolutionary history of lungfishes with a new phylogeny of post-Devonian genera". Palaeogeography, Palaeoclimatology, Palaeoecology. 471: 209–219. doi:10.1016/j.palaeo.2016.12.051. ISSN 0031-0182.
- ^ "Fossilworks: Ceratodontoidei". fossilworks.org. Retrieved 17 December 2021.
- ^ a b c Kemp, Anne; Cavin, Lionel; Guinot, Guillaume (2017-04-01). "Evolutionary history of lungfishes with a new phylogeny of post-Devonian genera". Palaeogeography, Palaeoclimatology, Palaeoecology. 471: 209–219. Bibcode:2017PPP...471..209K. doi:10.1016/j.palaeo.2016.12.051. ISSN 0031-0182.