• Bilabium Miquel, 1858 accepted as Liebigia Endlicher, 1841
• Bilabrella J. Lindley, 1834 accepted as Habenaria Willdenow, 1805
• Bilabria Schmidt, 1936
• Bilabria gigantea Anderson & Imamura, 2008
• Bilabria ornata (Soldatov, 1922)
• Bilabrum Schoenle & Arndt in Schoenle et al., 2020
• Bilacinia Manter, 1969
• Bilacinia australis Manter, 1969
• Bilacinia lobata (Yamaguti, 1970) Chambers & Cribb, 2006
• Bilacunaria M.G. Pimenov & V.N. Tikhomirov, 1983
• Bilacus O. Kuntze, 1891 (uncertain)
• Bilamelliferus Weyrauch, 1958 (uncertain)
• Bilamellophrya Foissner, Agatha & Berger, 2002
• Bilaminatus Zeng & Hu, 1982 † (uncertain)
• Bilaminella Babanova, 1965 †
• Bilamista Rafinesque, 1838 accepted as Eustoma R.A. Salisbury, 1806
• Bilania Schileyko, 1986 (uncertain)
• Bilapillus J.A. Lees, 2007 †
• Bilarzia Mazzei, 1905 accepted as Bilharzia Cobbold, 1859
• Bilateracotyle Chauhan, 1945 (uncertain)
• Bilateracotyloides Ramalingam, 1961 (uncertain)
• Bilaterana Bauer, 1985
• Bilaterocoenia Morycowa, 1974 †
• Bilaterocolumnus Donovan, 1989 †
• Bilaterocotyle Chauhan, 1945
• Bilaterocotyle carangis (Ramalingam, 1961) Yamaguti, 1961 accepted as Bilaterocotyloides carangis Ramalingam, 1961
• Bilaterocotyle chauhani Agrawal & Sharma, 1986 accepted as Bilaterocotyle lucknowensis (Agrawal & Sharma, 1986) Pandey & Agrawal, 2008
• Bilaterocotyle chirocentrosus Chauhan, 1945
• Bilaterocotyle lucknowensis (Agrawal & Sharma, 1986) Pandey & Agrawal, 2008
• Bilaterocotyle madrasensis (Radha, 1966) Pandey & Agrawal, 2008 accepted as Bilaterocotyloides madrasensis Radha, 1966
• Bilaterocotyle mamaevi Agrawal, 1988 accepted as Bilaterocotyloides mamaevi (Agarwal, 1988)
• Bilaterocotyle multitesticularis Khan & Karyakarte, 1982
• Bilaterocotyle novaeguineae Rohde, 1977 accepted as Bilaterocotyloides novaeguineae (Rohde, 1977) Lebedev, 1986
• Bilaterocotyle polynemusi Gutpa & Krishna, 1980
• Bilaterocotyle spindalis Deo & Karyakarte, 1980
• Bilaterocotyloides Ramalingam, 1961
• Bilaterocotyloides carangis Ramalingam, 1961
• Bilaterocotyloides madrasensis Radha, 1966
• Bilaterocotyloides mamaevi (Agarwal, 1988)
• Bilaterocotyloides novaeguineae (Rohde, 1977) Lebedev, 1986
• Bilaterocotyloides spinulosus Liu in Zhang, Yang & Liu, 2001
• Bilatorchis Eduardo, 1980 (uncertain)
• Bilawrencia Vandel, 1973 † accepted as Littorophiloscia Hatch, 1947
• Bilawrencia albicincta Vandel, 1973 † accepted as Littorophiloscia albicincta (Vandel, 1973)
• Bilawrencia denticulata Ferrara & Taiti, 1982 † accepted as Littorophiloscia denticulata (Ferrara & Taiti, 1982)
• Bilawrencia occidentalis Ferrara & Taiti, 1983 † accepted as Littorophiloscia occidentalis (Ferrara & Taiti, 1983)