◆スパティケファルス・マルスデニ (絶滅) Spathicephalus marsdeni Smithson, Browne, Davies, Marshall, Millward, Walsh & Clack 2017 *『A New Mississippian Tetrapod from Fife, Scotland, and Its Environmental Context:Timothy Richard Smithson, Michael A.E.Browne, Sarah J.Davies, John E.A.Marshall, David Millward, Stig A.Walsh & Jennifer Alice Clack (2017)』。
◆スパティケファルス・ミルス (絶滅) Spathicephalus mirus Watson 1929 *『The Carboniferous Amphibia of Scotland:David Meredith Seares Watson (1929)』。
◆スパティケファルス・ペレゲル (絶滅) Spathicephalus pereger Baird 1962 *『A Rhachitomous Amphibian Spathicephalus, from the Mississippian of Nova Scotia:Donald Baird (1962)』。