Gastropoda - Bellerophontida - Bellerophontidae

Alternative combination: Bellerophon troosti

Full reference: A. E. de Ferrusac and A. D. d'Orbigny. 1840. Histoire naturelle générale et particulière de céphalopodes acétabulifères vivants et fossiles 1-361

Belongs to Sphenosphaera according to P. J. Wagner 2011

Sister taxa: Sphenosphaera bilineatus, Sphenosphaera burginensis, Sphenosphaera capax, 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

Type specimen: USNM 45711, a shell

Ecology: slow-moving low-level epifaunal detritivore

Average measurements (in mm): shell 18.2 x 10.2