Gastropoda - Bellerophontida - Bellerophontidae

Alternative combination: Bellerophon capax

Full reference: E. O. Ulrich and W. H. Scofield. 1897. The Lower Silurian Gastropoda of Minnesota. The Paleontology of Minnesota 39(2):813-1081

Belongs to Sphenosphaera according to P. J. Wagner 2011

Sister taxa: Sphenosphaera bilineatus, Sphenosphaera burginensis, Sphenosphaera centervillensis, Sphenosphaera eiseni, Sphenosphaera fiscellostriata, Sphenosphaera kepinensis, Sphenosphaera laurentinus, Sphenosphaera mohri, Sphenosphaera nana, Sphenosphaera opertus, Sphenosphaera platystoma, Sphenosphaera recurvus, Sphenosphaera rogersensis, Sphenosphaera similis, Sphenosphaera subangularis, Sphenosphaera troosti

Type specimen: USNM 45698, a shell

Average measurements (in mm): shell 37.3 x 45.7