Bluefieldius
Appearance
![](http://upload.wikimedia.org/wikipedia/commons/thumb/8/8d/Bluefieldius_fig-3-full-b.png/220px-Bluefieldius_fig-3-full-b.png)
Bluefieldius is an extinct genus of ray-finned fish from the Late Mississippian in what is now West Virginia. The only species is Bluefieldius mercerensis. Bluefieldius mercerensis is known from a single fossil collected from the Bluefield Formation.