class Osteichthyes, Osteichthyes - a class of fish having a skeleton composed of bone in addition to cartilage

lungfish - air-breathing fish having an elongated body and fleshy paired fins; certain species construct mucus-lined mud coverings in which to survive drought

Ceratodontidae, family Ceratodontidae - lungfishes having hornlike ridges on the teeth

class - (biology) a taxonomic group containing one or more orders