Dapediidae is an extinct family of neopterygian ray-finned fish that lived from the Middle Triassic to Late Jurassic (Ladinian to Tithonian).

[3] Dapediids had deep, laterally flattened circular bodies covered in thick ganoid scales, which gave them a resemblance to the pycnodontiforms, a group they may or may not be related to.

[4] Their teeth were adapted towards a durophagous diet; some dapediids fed on hard-shelled invertebrates,[5] while at least one genus (Hemicalypterus) may have been herbivorous.

[6] Dapediids are usually considered to be either basal ginglymodians[3][6] or stem group representatives of the wider clade Holostei,[4][7] but some studies have found them to be early-diverging stem-teleosts instead.

This article about a prehistoric ray-finned fish is a stub.