subclass Dipnoi
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| Noun | 1. |  subclass Dipnoi - bony fishes of the southern hemisphere that breathe by a modified air bladder as well as gills; sometimes classified as an order of Crossopterygiiclass 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 |
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