Drydenius
Drydenius is an extinct genus of marine ray-finned fish known from the early-mid Carboniferous of the United Kingdom. It is one of a number of early fish genera long placed in the likely paraphyletic order Palaeonisciformes.
It contains the following species:D. insignis Traquair, 1890 - Serpukhovian of Scotland D. molyneuxi - Late Bashkirian of England and Wales