Gastropoda - Cerithimorpha - Orthonemidae

Alternative combination: Stegocoelia (Hypergonia) baldwinensis

Full reference: M.L. Thein and M.H. Nitecki. 1974. Chesterian (Upper Mississippian) Gastropoda of the Illinois basin. Fieldiana: Geology, New Series 34:1-238

Belongs to Hypergonia according to P. J. Wagner 2023

See also Rollins 1975 and Thein and Nitecki 1974

Sister taxa: Hypergonia agraciada, Hypergonia attenuata, Hypergonia deplanata, Hypergonia elongata, Hypergonia hoffmani, Hypergonia illinoiensis, Hypergonia kirkbyi, Hypergonia marvinwelleri, Hypergonia mcoyi, Hypergonia percarinata, Hypergonia percostata, Hypergonia prolixa, Hypergonia quadricarinata, Hypergonia tatei, Hypergonia tenuis, Hypergonia turritella, Hypergonia vermicula, Hypergonia youngiana, Murchisonia (Hypergonia) fastigiata, Stegocoelia (Hypergonia) acuminata, Stegocoelia (Hypergonia) cincta, Stegocoelia (Hypergonia) jonathanensis, Stegocoelia (Hypergonia) korobkovi

Ecology: epifaunal

Distribution: found only at Sinkhole quarry in east part of Evansville, between RR and east-west county road (Carboniferous of Illinois)

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Specimen images are retrieved through the ePANDDA API.