Fundulus cf. zebrinus

Pliocene

Rita Blanca Formation

Oldham County, TX USA.

18mm killifish on 117mm slab.

Fish

Fundulus is a genus of bony fish that dates back to the Early-Middle Miocene of Nevada but is perhaps best known from the Pliocene of that state (Truckee Formation).  The various species of this genus are commonly called “killifish” or “topminnows.”  This specimen compares favorably to the modern Plains killifish, a river fish with tolerance for saltwater.