Gyrosteus

Gyrosteus is an extinct genus of ray-finned fish from the family Chondrosteidae that lived during the Lower Jurassic. It has a single species, G. mirabilis.

Life restoration

There could be a "second" species, G. subdeltoideus. However, not much data has been gathered on it, but it is known from otoliths.

Description

This large fish had a sturgeon-like body, reaching 6 metres (20 ft) to 7 metres (23 ft) long.

Specimens

Gyrosteus is only known from incomplete fossil specimens.

References

1. Hornung, Jahn J.; Sachs, Sven (2020). "First record of Gyrosteus mirabilis (Actinopterygii, Chondrosteidae) from the Toarcian (Lower Jurassic) of the Baltic region". PeerJ.