†Family LycopteridaeSmall freshwater fishes resembling hiodontiforms. 4 genera, 6 species. Early Cretaceous of northeastern Asia.Family Notopteridae (knifefishes or featherbacks).Long anal fin confluent with reduced caudal; dorsal fin small or absent. 8 species in 4 genera: Papyrocranus (2 species) and Xenomystus (1
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