Family uncertain Genus Ballagadus♂ SMITHSON, RICHARDS & CLACK 2016 バルラガドゥス属 (絶滅)
◆バルラガドゥス・カウストリミ (絶滅) †Ballagadus caustrimi Smithson, Richards & Clack 2016 *2016『Lungfish Diversity in Romer's Gap, Reactionto the End-Devonian Extinction:Timothy Richard Smithson, Kelly Rebecca Richards & Jennifer Alice Clack』。
◆バルラガドゥス・ロッシ (絶滅) †Ballagadus rossi Smithson, Richards & Clack 2016 *2016『Lungfish Diversity in Romer's Gap, Reactionto the End-Devonian Extinction:Timothy Richard Smithson, Kelly Rebecca Richards & Jennifer Alice Clack』。
Family uncertain Genus Braccodus♂ ELLIOTT, CHALLANDS & SMITHSON 2023 ブラッコドゥス属 (絶滅)
◆ブラッコドゥス・ケルリ (絶滅) †Braccodus kerri Elliott, Challands & Smithson 2023 *2023『Dipnoan Diversity in the Early Pennsylvanian of Scotland, New Lung-Fish from the Lower Coal Measures of North Lanarkshire:Francis M.Elliott, Thomas James Challands & Timothy Richard Smithson』。
Family uncertain Genus Coccovedus♂ SMITHSON, RICHARDS & CLACK 2016 コッコウェドゥス属 (絶滅)
◆コッコウェドゥス・ケラトゥス (絶滅) †Coccovedus celatus Smithson, Richards & Clack 2016 *2016『Lungfish Diversity in Romer's Gap, Reactionto the End-Devonian Extinction:Timothy Richard Smithson, Kelly Rebecca Richards & Jennifer Alice Clack』。
Family uncertain Genus Janvierpaucidentes♂ JOHANSON, NEWMAN, DE LAZARO, SMITH & JONES 2023 ヤンウィエルパウキデンテス属 (絶滅)
◆ヤンウィエルパウキデンテス・トゥウリンギ (絶滅) †Janvierpaucidentes tuulingi Johanson, Newman, de Lazaro, Smith & Jones 2023 *2023『A New Dipnoan Species Janvierpaucidentes tuulingi gen. et sp.nov. from the Pragian, Early Devonian of Mimerdalen, Svalbard, Norway, with an Unusual Dentition:Zerina Johanson, Michael James Newman, Gizeh Rangel de Lazaro, Moya Meredith Smith & Roger Jones』。
Family uncertain Genus Lanarkodus♂ ELLIOTT, CHALLANDS & SMITHSON 2023 ラナルコドゥス属 (絶滅)
◆ラナルコドゥス・クラルキ (絶滅) †Lanarkodus clarki Elliott, Challands & Smithson 2023 *2023『Dipnoan Diversity in the Early Pennsylvanian of Scotland, New Lung-Fish from the Lower Coal Measures of North Lanarkshire:Francis M.Elliott, Thomas James Challands & Timothy Richard Smithson』。
Family uncertain Genus Limanichthys♂ CHALLANDS, SMITHSON, CLACK, BENNETT, MARSHALL, WALLACE-JOHNSON & HILL 2019 リマニクティス属 (絶滅)
◆リマニクティス・フラセリ (絶滅) †Limanichthys fraseri Challands, Smithson, Clack, Bennett, Marshall, Wallace-Johnson & Hill 2019 *2019『A Lungfish Survivor of the End-Devonian Extinction and an Early Carboniferous Dipnoan Radiation:Tom J.Challands, Timothy Richard Smithson, Jennifer Alice Clack, Carys E.Bennett, John E.A.Marshall, Wallace-Johnson & Henrietta Hill』。
Family uncertain Genus Typodus♂VON MEYER 1847 ティポドゥス属 (絶滅)
※≠Genus Typodus♂ QUENSTEDT 1858 [Macromesodontidae]。
◆ティポドゥス・グラベル (絶滅) †Typodus glaber von Meyer 1847 *1847『Placothorax Agassizi und Typodus glaber, zwei Fische im Uebergangskalke der Eifel:Christian Erich Herman von Meyer』。
Family uncertain Genus Xylognathus♂ SMITHSON, RICHARDS & CLACK 2016 キシログナトゥス属 (絶滅)
◆キシログナトゥス・マクルステヌス (絶滅) †Xylognathus macrustenus Smithson, Richards & Clack 2016 *2016『Lungfish Diversity in Romer's Gap, Reactionto the End-Devonian Extinction:Timothy Richard Smithson, Kelly Rebecca Richards & Jennifer Alice Clack』。