LycopteridaeLycopteridae is an extinct family of freshwater osteoglossomorph ray-finned fishes.GeneraLycoptera Müller, 1848Aokiichthys Yabumoto 1994Changichthys Su 1991Yungkangichthys Chang and Chou 1974DescriptionThese ray-finned fishes were small, often only a finger's length, with small, almost circular scales.DistributionThey occurred in East Asian rivers and lakes from the Jurassic to Cretaceous. Fossils of these fishes have been found in China and Japan.