Gastropoda - Cerithimorpha - Orthonemidae

Alternative combinations: Ectomaria attenuata, Murchisonia attenuata, Solenospira attenuata

Full reference: J. Hall. 1856. Description of new species of fossils from the Carboniferous limestones of Indiana and Illinois. Transactions of the Albany Institute 4:1-36

Belongs to Hypergonia according to P. J. Wagner 2011

Sister taxa: Hypergonia agraciada, Hypergonia baldwinensis, Hypergonia elongata, Hypergonia hoffmani, Hypergonia illinoiensis, Hypergonia kirkbyi, Hypergonia marvinwelleri, Hypergonia percarinata, Hypergonia percostata, 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