Bluefieldius
| Bluefieldius Temporal range:    | |
|---|---|
   | |
| Holotype specimen | |
| Scientific classification  | |
| Kingdom: | Animalia | 
| Phylum: | Chordata | 
| Class: | Actinopterygii | 
| Genus: | † Mickle, 2018  | 
| Species: | †B. mercerensis   | 
| Binomial name | |
| †Bluefieldius mercerensis Mickle, 2018   | |
Bluefieldius is an extinct genus of marine ray-finned fish that lived during the Late Mississippian (Early Carboniferous) epoch in what is now West Virginia, United States.[1] It is known from a single fossil collected from the late Serpukhovian or early Viséan Bluefield Formation.[2] The type and only species (monotypy) is Bluefieldius mercerensis.
It has a "palaeoniscoid" body plan, although as that order is thought to be paraphyletic, it was described as an indeterminate actinopterygian.[2]
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