(of)Savage, T. E. (1913). Stratigraphy and paleontology of the Alexandrian Series in Illinois and Missouri. Part I. <em>Illinois Geological Survey, Bulletin.</em> 23: 1-124.[details]
MolluscaBase eds. (2025). MolluscaBase. Sphenosphaera consimilis (Savage, 1913) †. Accessed through: Marine Species Traits editorial board (2025) Marine Species Traits at: https://www.marinespecies.org/traits/aphia.php?p=taxdetails&id=1757350 on 2025-05-20
Marine Species Traits editorial board (2025). Marine Species Traits. Sphenosphaera consimilis (Savage, 1913) †. Accessed at: https://www.marinespecies.org/traits/aphia.php?p=taxdetails&id=1757350 on 2025-05-20
original description(of)Savage, T. E. (1913). Stratigraphy and paleontology of the Alexandrian Series in Illinois and Missouri. Part I. <em>Illinois Geological Survey, Bulletin.</em> 23: 1-124.[details]