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|Noun||1.||Ceratodontidae - lungfishes having hornlike ridges on the teeth|
fish family - any of various families of fish
Dipnoi, 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 Crossopterygii
genus Ceratodus - type genus of the Ceratodontidae: extinct genus of lungfishes
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