Mesozoic fish of North America

Semionotus (from , 'mark' and , 'back') is an extinct genus of ray-finned fish found throughout Northern Pangaea (North America and Europe) during the late Triassic, becoming extinct in the Early Jurassic. thumb|left|Fossil slab of S. kapffi mass mortality thumb|left|Reconstruction of a generalized individual

thumb|240px|right|Vinctifer comptoni