Acetitomaculum Greening & Leedle, 1995 (basis of record)
Acetitomaculum Greening & Leedle, 1995 (extant flag source)
Acetivibrio Patel, Khan, Agnew & Colvin, 1980 (extant flag source)
Acetivibrio Patel, Khan, Agnew & Colvin, 1980 (basis of record)
Acetoanaerobium Sleat et al., 1985 (basis of record)
Acetoanaerobium Sleat et al., 1985 (extant flag source)
Acetobacter Beijerinck, 1898 (Approved Lists, 1980) (basis of record)
Acetobacter Beijerinck, 1898 (Approved Lists, 1980) (extant flag source)
Acetobacterium Balch, Schoberth, Tanner & Wolfe, 1977 (Approved Lists, 1980) (extant flag source)
Acetobacterium Balch, Schoberth, Tanner & Wolfe, 1977 (Approved Lists, 1980) (basis of record)
Acetofilamentum Dietrich et al., 1989 (extant flag source)
Acetofilamentum Dietrich et al., 1989 (basis of record)
Acetogenium Leigh & Wolfe, 1983 accepted as Thermoanaerobacter Wiegel & Ljungdahl, 1982 (basis of record)
Acetogenium Leigh & Wolfe, 1983 accepted as Thermoanaerobacter Wiegel & Ljungdahl, 1982 (extant flag source)
Acetohalobium Zhilina & Zavarzin, 1990 (extant flag source)
Acetohalobium Zhilina & Zavarzin, 1990 (basis of record)
Acetomicrobium Soutschek et al., 1985 (extant flag source)
Acetomicrobium Soutschek et al., 1985 (basis of record)
Acetonema Kane & Breznak, 1992 (extant flag source)
Acetonema Kane & Breznak, 1992 (basis of record)
Acetothermus Dietrich et al., 1988 (basis of record)
Acetothermus Dietrich et al., 1988 (extant flag source)
Acholeplasma Edward & Freundt, 1970 (Approved Lists, 1980) (extant flag source)
Acholeplasma Edward & Freundt, 1970 (Approved Lists, 1980) (basis of record)
Achromatium Schewiakoff, 1893 (Approved Lists, 1980) (basis of record)
Achromatium Schewiakoff, 1893 (Approved Lists, 1980) (extant flag source)
Achromobacter Yabuuchi & Yano, 1981 (basis of record)
Achromobacter Yabuuchi & Yano, 1981 (extant flag source)
Acidaminobacter Stams & Hansen, 1985 (basis of record)
Acidaminobacter Stams & Hansen, 1985 (extant flag source)
Acidaminococcus Rogosa, 1969 (Approved Lists, 1980) emend. Jumas-Bilak et al., 2007 (extant flag source)
Acidaminococcus Rogosa, 1969 (Approved Lists, 1980) emend. Jumas-Bilak et al., 2007 (basis of record)
Acidimicrobium Clark & Norris, 1996 (basis of record)
Acidimicrobium Clark & Norris, 1996 (extant flag source)
Acidiphilium Harrison, 1981 (basis of record)
Acidiphilium Harrison, 1981 (extant flag source)
Acidisphaera Hiraishi, Matsuzawa, Kanbe & Wakao, 2000 (basis of record)
Acidisphaera Hiraishi, Matsuzawa, Kanbe & Wakao, 2000 (extant flag source)
Acidithiobacillus Kelly & Wood, 2000 (basis of record)
Acidithiobacillus Kelly & Wood, 2000 (extant flag source)
Acidobacterium Kishimoto et al., 1991 (basis of record)
Acidobacterium Kishimoto et al., 1991 (extant flag source)
Acidocella Kishimoto et al., 1996 (extant flag source)
Acidocella Kishimoto et al., 1996 (basis of record)
Acidolobus accepted as Acidilobus Prokofeva et al., 2000 emend. Prokofeva, Kostrikina, Kolganova, Tourova, Lysenko, Lebedinsky & Bonch-Osmolovskaya, 2009 (extant flag source)
Acidolobus accepted as Acidilobus Prokofeva et al., 2000 emend. Prokofeva, Kostrikina, Kolganova, Tourova, Lysenko, Lebedinsky & Bonch-Osmolovskaya, 2009 (basis of record)
Acidomonas Urakami, Tamaoka, Suzuki & Komagata, 1989 (basis of record)
Acidomonas Urakami, Tamaoka, Suzuki & Komagata, 1989 (extant flag source)
Acidothermus Mohagheghi, Grohmann, Himmel, Leighton & Updegraff, 1986 (basis of record)
Acidothermus Mohagheghi, Grohmann, Himmel, Leighton & Updegraff, 1986 (extant flag source)
Acidovorax Willems, Falsen, Pot, Jantzen, Hoste, Vandamme, Gillis, Kersters & De Ley, 1990 (basis of record)
Acidovorax Willems, Falsen, Pot, Jantzen, Hoste, Vandamme, Gillis, Kersters & De Ley, 1990 (extant flag source)
Acinetobacter Brisou & Prévot, 1954 (Approved Lists, 1980) (extant flag source)
Acinetobacter Brisou & Prévot, 1954 (Approved Lists, 1980) (basis of record)
Acrocarpospora Tamura et al., 2000 (extant flag source)
Acrocarpospora Tamura et al., 2000 (basis of record)
Actinoalloteichus Tamura et al., 2000 (basis of record)
Actinoalloteichus Tamura et al., 2000 (extant flag source)
Actinobacillus Brumpt, 1910 (Approved Lists, 1980) (basis of record)
Actinobacillus Brumpt, 1910 (Approved Lists, 1980) (extant flag source)
Actinobaculum Lawson, Falsen, Akervall, Vandamme & Collins, 1997 (basis of record)
Actinobaculum Lawson, Falsen, Akervall, Vandamme & Collins, 1997 (extant flag source)
Actinobispora Jiang et al., 1991 (extant flag source)
Actinobispora Jiang et al., 1991 (basis of record)
Actinocorallia Iinuma et al., 1994 (extant flag source)
Actinocorallia Iinuma et al., 1994 (basis of record)
Actinokineospora Hasegawa, 1988 (basis of record)
Actinokineospora Hasegawa, 1988 (extant flag source)
Actinomadura H. Lechevalier & M.P. Lechevalier, 1968 (Approved Lists, 1980) (basis of record)
Actinomyces Harz, 1877 (Approved Lists, 1980) (basis of record)
Actinoplanes Couch, 1950 (Approved Lists, 1980) (basis of record)
Actinopolyspora Gochnauer, K.G. Johnson & Kushner, 1975 (Approved Lists, 1980) (basis of record)
Actinosynnema T. Hasegawa, H. Lechevalier & M.P. Lechevalier, 1978 (Approved Lists, 1980) (basis of record)
Aegyptianella Carpano, 1929 (Approved Lists, 1980) (basis of record)
Aegyptianella Carpano, 1929 (Approved Lists, 1980) (extant flag source)
Aerococcus Williams et al., 1953 (Approved Lists, 1980) (basis of record)
Aerococcus Williams et al., 1953 (Approved Lists, 1980) (extant flag source)
Aeromicrobium Miller et al., 1991 (basis of record)
Aeromicrobium Miller et al., 1991 (extant flag source)
Aeromonas Stanier, 1943 (Approved Lists, 1980) (extant flag source)
Aeromonas Stanier, 1943 (Approved Lists, 1980) (basis of record)
Afipia Brenner, Hollis, Moss, English, Hall, Vincent, Radosevic, Birkness, Bibb, Quinn, Swaminathan, Weaver, Reeves, O'Connor, Hayes, Tenover, Steigerwalt, Perkins, Daneshvar, Hill, Washington, Woods, Hunter, Hadfield, Ajello, Kaufmann, Wear & Wenger, 1992 (basis of record)
Afipia Brenner, Hollis, Moss, English, Hall, Vincent, Radosevic, Birkness, Bibb, Quinn, Swaminathan, Weaver, Reeves, O'Connor, Hayes, Tenover, Steigerwalt, Perkins, Daneshvar, Hill, Washington, Woods, Hunter, Hadfield, Ajello, Kaufmann, Wear & Wenger, 1992 (extant flag source)
Agitococcus Franzmann & Skerman, 1981 (extant flag source)
Agitococcus Franzmann & Skerman, 1981 (basis of record)
Agrobacterium Conn, 1942 (Approved Lists, 1980) (extant flag source)
Agrobacterium Conn, 1942 (Approved Lists, 1980) (basis of record)
Agrococcus Groth, Schumann, Weiss, Martin & Rainey, 1996 (extant flag source)
Agrococcus Groth, Schumann, Weiss, Martin & Rainey, 1996 (basis of record)
Agromonas Ohta & Hattori, 1985 (basis of record)
Agromonas Ohta & Hattori, 1985 (extant flag source)
Agromyces Gledhill & Casida, 1969 (Approved Lists, 1980) emend. Zgurskaya, Evtushenko, Akimov, Voyevoda, Dobrovolskaya, Lysak & Kalakoutskii, 1992 (extant flag source)
Agromyces Gledhill & Casida, 1969 (Approved Lists, 1980) emend. Zgurskaya, Evtushenko, Akimov, Voyevoda, Dobrovolskaya, Lysak & Kalakoutskii, 1992 (basis of record)
Ahrensia Uchino et al., 1999 (extant flag source)
Ahrensia Uchino et al., 1999 (basis of record)
Alcaligenes Castellani & Chalmers, 1919 (Approved Lists, 1980) (extant flag source)
Alcaligenes Castellani & Chalmers, 1919 (Approved Lists, 1980) (basis of record)
Alcanivorax Yakimov et al., 1998 (extant flag source)
Alcanivorax Yakimov et al., 1998 (basis of record)
Alicyclobacillus Wisotzkey, Jurtshuk, Fox, Deinhard & Poralla, 1992 (basis of record)