Balashovia is a genus of oncocerid nautiloids from the Middle Devonian, (lower Eifelian), included in the Archiacoceratidae, a family characterized by compressed, exogastric, cyrtocones with a large, actinosiphonate, dorsal siphuncle.
References
The Paleobiology Database Balashovia entry accessed 8/21/12 Sepkoski J.J. List of Cephalopod Genera Walter C. Sweet, 1964. Nautiloidea - Oncocerida. Treatise on Invertebrate Paleontology, Part K, 1964.