Dichotomous Key/Dipnoi

1

 * Lungs
 * Paired - Neoceratodus forsteri
 * Unpaired -

2: Ceratodontiformes
it is Omnivorous .teeth are strong .it depend on air  in breathing. it breath in water by gills  and  dyring drynees through lung
 * Habitat
 * South America - Lepidosiren paradoxa
 * Africa -

3: Protopteridae
Could be Protopterus aethiopicus, P. amphibius, P. annectens or P. dolloi