Pteronisculus is an extinct genus of prehistoric ray-finned fish that lived during the Early Triassic and Middle Triassic epochs of the Triassic period. It was first described under the name "Glaucolepis" by Erik Stensiö in 1921 and was later shown to be a synonym of Pteronisculus described by Errol White in 1933. However, because the name "Glaucolepis" is preoccupied (it had already been given to the extant lepidopteran Glaucolepis Braun, 1917), Pteronisculus became the valid genus name for the Triassic fish.