• Bion Cambridge, 1898 (uncertain) [Family: Arachnida (awaiting allocation)]
• Bion H. Lohmann, 1904 † [Family: Algae (awaiting allocation)]
• Bion Rehn, 1937 accepted as Bionoblatta Rehn, 1940 [Family: Blaberidae]
• Bion bacifer Eisenack †
• Bion cruciferum A. Eisenack, 1951 †
• Bion fluctuans A. Eisenack, 1938 †
• Bion mastrucata Rehn, 1937 accepted as Bionoblatta mastrucata (Rehn, 1937)
• Bion medium Eisenack †
• Bion megacystis A. Eisenack, 1938 †
• Bion micracystis Eisenack †
• Bion multispinosum (Moebius) Lohmann †
• Bion navis Eisenack †
• Bion pelagicum A. Eisenack, 1938 †
• Bion perforatum A. Eisenack, 1934 †
• Bion perivelatum A. Eisenack, 1938 †
• Bion ramosum Ehrenberg †
• Bion solidum Eisenack †
• Biondia Schlechter, 1905
• Biondiana Özdikmen, 2021 accepted as Chaetocnema Stephens, 1831
• Bionectria Spegazzini, 1919
• Bionectria apocyni (Peck) Schroers & Samuels, 1997
• Bionectria aureofulva (Cooke & Ellis) Schroers & Samuels, 1997
• Bionectria byssicola (Berk. & Broome) Schroers & Samuels, 1997
• Bionectria coronata (Juel) Schroers, 2001 accepted as Pseudonectria coronata (Juel) Lowen, 1993
• Bionectria grammicospora (Ferd. & Winge) Schroers & Samuels, 2001 accepted as Nectria grammicospora Ferd. & Winge, 1908
• Bionectria grammicosporopsis (Samuels) Schroers & Samuels, 2001 accepted as Nectria grammicosporopsis Samuels, 1988
• Bionectria kowhaii (Dingley) Schroers, 2001 accepted as Nectria kowhai Dingley, 1956
• Bionectria lasiacidis (Samuels) Schroers, 2001 accepted as Nectria lasiacidis Samuels, 1989
• Bionectria lucifer (Samuels) Schroers & Samuels, 2001 accepted as Nectria lucifer Samuels, 1988
• Bionectria ochroleuca (Schwein.) Schroers & Samuels, 1997
• Bionectria ralfsii (Berk. & Broome) Schroers & Samuels, 2001 accepted as Nectria ralfsii Berk. & Broome, 1854
• Bionectria sesquicillii (Samuels) Schroers, 2001 accepted as Nectria sesquicillii Samuels, 1989
• Bionectria solani (Reinke & Berthold) Schroers, 2001 accepted as Nectria ventricosa C. Booth, 1971
• Bionectria subquaternata (Berk. & Broome) Schroers & Samuels, 2001 accepted as Nectria subquaternata Berk. & Broome, 1873
• Bionectria tonduzii Speg., 1919
• Bionectria tornata (Höhn.) Schroers, 2001
• Bionectriaceae
• Bionesus Fairmaire, 1879
• Bionesus gebieni Kulzer, 1966 accepted as Strongylium gebieni (Kulzer, 1966)
• Bionesus neboissi Kulzer, 1966
• Bionesus rufescens Kulzer, 1966
• Bionia C.F.P. Martius ex Bentham, 1837 (uncertain)
• Bionia coriacea (Nees & Mart.) Benth. accepted as Camptosema coriaceum Benth.
• Bionia marginata Benth. accepted as Camptosema coriaceum Benth.
• Bionoblatta Rehn, 1940
• Bionoblatta diabolus (Saussure, 1864)
• Bionoblatta itatiayae (Miranda Ribeiro, 1936)
• Bionoblatta mastrucata (Rehn, 1937)
• Bionoblatta oiticicai Albuquerque, 1957
• Bionychiurus Pomorski, 1996 (uncertain)
• Bionychus Motschulsky, 1859 (unaccepted > nomen nudum)