Gastropoda - Cerithimorpha - Orthonemidae

Alternative combinations: Stegocoelia (Hypergonia) percostata, Taosia percostata

Full reference: G. H. Girty. 1939. Certain pleurotomariid gastropods from the Carboniferous of New Mexico and Texas. Journal of the Washington Academy of Sciences 29(1):21-36

Belongs to Hypergonia according to P. J. Wagner 2011

Sister taxa: Hypergonia agraciada, Hypergonia attenuata, Hypergonia baldwinensis, Hypergonia elongata, Hypergonia hoffmani, Hypergonia illinoiensis, Hypergonia kirkbyi, Hypergonia marvinwelleri, Hypergonia percarinata, Hypergonia prolixa, Hypergonia quadricarinata, Hypergonia tatei, Hypergonia tenuis, Hypergonia turritella, Hypergonia vermicula, Stegocoelia (Hypergonia) acuminata, Stegocoelia (Hypergonia) cincta, Stegocoelia (Hypergonia) jonathanensis, Stegocoelia (Hypergonia) korobkovi

Ecology: epifaunal

Average measurements (in mm): shell width 1.50