Sub-Family uncertain Genus Parapsephurus♂ HILTON, DURING, GRANDE & AHLBERG 2023 パラプセフルス属 (絶滅)
◆パラプセフルス・ウィルリベミシ (絶滅) Parapsephurus willybemisi Hilton, During, Grande & Ahlberg 2023 *2023『New Paddle-Fishes [Acipenseriformes, Polyodontidae] from the Late Cretaceous Tanis Site of the Hell Creek Formation in North Dakota, USA:Eric J.Hilton, Melanie A.D.During, Lance Grande & Per Erik Ahlberg』。
Sub-Family uncertain Genus Pholidurus♂ WOODWARD 1891 フォリドゥルス属 (絶滅)
◆フォリドゥルス・ディスイェクトゥス (絶滅) Pholidurus disjectus Woodward 1891 *1891『On the Palæontology of Sturgeons 1889-1890:Arthur Smith Woodward』。 *1895『Catalogue of the Fossil Fishes in the British Museum, Naturtal History 3, Containing the Actinopterygian Teleostomi of the Orders Chondrostei-Concluded, Protospondyli, Aetheospokdyli and Isospondyli in part:Arthur Smith Woodward』。