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The Collaborative International Dictionary
Crossopterygii

Crossopterygii \Cros*sop`te*ryg"i*i\ (kr?s-s?p`t?-r?j?-?), n. pl. [NL., fr. Gr. ??? tassels, a fringe + ?????, dim. of ???? wing, fin.] (Zo["o]l.) An order of ganoid fishes including among living species the bichir ( Polypterus). See Brachioganoidei.

WordNet

Usage examples of "crossopterygii".

Whereas on earth, one group of fishes, the Crossopterygii, made the transition from water to land, on Krishna two groups did it: the Tetrapoda, which have remained oviparous although they include the hominoid species, and the Hexapoda, who early developed viviparity.