Family uncertain Genus Arcuodus♂ ITANO & LAMBERT 2018 アルクオドゥス属 (絶滅)
◆アルクオドゥス・ムルティクスピダトゥス (絶滅) †Arcuodus multicuspidatus Itano & Lambert 2018 *2018『A New Cochliodont Anterior Tooth Plate from the Mississippian of Alabama, USA, Having Implications for the Origin of Tooth Plates from Tooth Files:Wayne M.Itano & Lance L.Lambert』。
Family uncertain Genus Whitropus♂ RICHARDS, SHERWIN, SMITHSON, BENNION, DAVIES, MARSHALL & CLACK 2018 ウィトロプス属 (絶滅)
◆ウィトロプス・ロンギカルクス (絶滅) †Whitropus longicalcus Richards, Sherwin, Smithson, Bennion, Davies, Marshall & Clack 2018 *2018『Diverse and Durophagous, Early Carboniferous Chondrichthyans from the Scottish Borders:Kelly Rebecca Richards, Janet E.Sherwin, Timothy Richard Smithson, Rebecca F.Bennion, Sarah J.Davies, John E.A.Marshall & Jennifer Alice Clack』。