Semionotus

Semionotus (from Greek: σημιον semion, 'mark' and Greek: νῶτος nôtos, 'back')^[1] 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.

Fossil slab of S. kapffi mass mortality

Reconstruction of a generalized individual

Semionotus Temporal range: Late Triassic to Earliest Jurassic
Fossils of S. bergeri
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Clade:	Ginglymodi
Order:	†Semionotiformes
Superfamily:	†Semionotoidea
Family:	†Semionotidae
Genus:	†Semionotus Agassiz, 1843