Tetragonolepis (from , 'four', , 'angle', and 'scale') is an extinct genus of bony fish belonging to the family Dapediidae that lived during the Rhaetian–Hettangian ages (latest Triassic to earliest Jurassic).
References
Sources In the Shadow of the Dinosaurs: Early Mesozoic Tetrapods by Nicholas C. Fraser and Hans-Dieter Sues