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.
References
External links "Semionotus elegans"-Photo-High Res--"Shuttle Meadow Formation"-Hartford Basin, Connecticut; Article – www.sunstar-solutions.com–"Basal Jurassic Dinosaur Fossils"