[ page update: 2019-XII-16; 2021-VI-16; 2023-VIII-15; mjw]
Bacesuella Hrabě, 1973; Trav. Mus. Hist. Nat. Grigore Antipa 13: 28; Typ: B. pontica Hrabě, 1973. (Tubificidae) [N.O., p. 48]
Bahlia Gates, 1945; Proc. Ind. Acad. Sci., Sect. B, 21(4): 236; Typ: B. albida Gates, 1945. (Octochaetidae) [N.O., p. 48]
Baikalodrilus Holmquist, 1978; Zool. Scripta 7(3): 206; Typ: Peloscolex kozovi Hrabě, 1969. (Tubificidae) [N.O.S.P., p. 16] [See Martin et al. 2019. Phylogenetic analysis of the Baikalodrilus species flock (Annelida: Clitellata: Naididae), an endemic genus to Lake Baikal (Russia). Zool. J. Linn. Soc. 187(4): 987-1015.]
Balanta Michaelsen, 1898; Mitt. Mus. Hamb. 15: 165; Typ: B. ehrhardti Michaelsen, 1898. (Megascolecidae) [N.O., p. 48]
Balanteodrilus Pickford, 1938; Publ. Carn. Inst. Wash., no. 491, p. 76; Typ: B. pearsei Pickford, 1938. (Acanthodrilidae) [N.O., p. 48]
Baltidrilus Timm, 2013; Zootaxa 3734(4): 499; Typ: Heterochaeta costata Claparède, 1863. (Tubificidae); {Timm established this nom. nov. for Heterochaeta Claparède, 1863 non Heterochaeta Westwood, 1843 (Insecta, Mantodea, Mantidae)}
Barbidrilus Loden et Locy, 1980; Proc. Biol. Soc. Wash. 93(4): 1173; Typ: B. paucisetus Loden et Locy, 1980. (Enchytraeidae)
(dies editionis 16 January 1981) [N.O.S.P., p. 16]
Barogaster Gates, 1940; Rec. Ind. Mus. 42: 130; Typ: Eudichogaster barodensis Stephenson, 1914. (Octochaetidae) [N.O., p. 48]
Barryjamiesonia Ljunström, 1971; Rev. Écol. Biol. Sol 8: 321; Typ: B. abberatus Ljunström, 1971. (Alluroididae) [N.O., p. 48]
Bathydrilus Cook, 1970; Deep Sea Res. 17: 974; Typ: B. asymmetricus Cook, 1970. (Tubificidae) [N.O., p. 48]
Bathynomus Grube, 1879; Jber. Schles. Ges. Vater. Kult. 56: 116; Typ: B. lemani Grube, 1879. (Lumbriculidae) [N.O., p. 48]
Bauba Righi, 1980; Pap. Avul. Zool. 33(13): 239; Typ: B. santosi Righi, 1980. (Ocnerodrilidae) [N.O.S.P., p. 16]
Beddardiella Michaelsen, 1910; Mitt. Mus. Hamb. 27: 133; Typ: B. dalrieia Michaelsen, 1910. (Eudrilidae) [N.O., p. 48]
Begemius Easton, 1982; Aust. J. Zool. 30(4): 713; Typ: B. jamiesoni Easton, 1982. (Megascolecidae) [N.O.S.S., p. 7]
Belladrilus Righi, 1984; Stud. Neotrop. Fauna Environ. 19(1): 16; Typ: B. jimi Righi, 1984. (Ocnerodrilidae) [N.O.S.S., p. 7]
Benhamia Michaelsen, 1889; Mitt. Mus. Hamb. 6: 6; Typ: B. rosea Michaelsen, 1889. (Octochaetidae) [N.O., p. 48]
Benhamiona Csuzdi et Zicsi, 1994; Rev. Suisse Zool. 101(1): 220; Typ: Benhamia baumanni Michaelsen, 1897. (Octochaetidae)
Bermudrilus Erséus, 1979; Trans. Amer. Micros. Soc. 98(3): 424; Typ: B. peniatus Erséus, 1979. (Tubificidae) [N.O.S.P., p. 16]
Bettonia Beddard, 1903; Proc. Zool. Soc. Lond., 1903, p. 213; Typ: B. lagariensis Beddard, 1903. (Eudrilidae) [N.O., p. 48]
Bettoniella Gates, 1941; Rec. Ind. Mus. 43: 497; pro: Bettonia Beddard, 1903. [N.O., p. 48]
Bichaeta Bretscher, 1900; Rev. Suisse Zool. 8: 444; Typ: B. sanguinea Bretscher, 1900. (Lumbriculidae) [N.O., p. 48]
Bilimba Rosa, 1890; Ann. Mus. Genova (2), 29: 386; Typ: B. papillata Rosa, 1890. (Microchaetidae) [N.O., p. 49]
Bimastos H. Moore, 1893; Zool. Anz. 16: 333; Typ: B. palustris H. Moore, 1895. (B. sp. H. Moore, 1893 =B. palustris H. Moore, 1895
(Lumbricidae) [N.O., p. 49]
Bimastus Michaelsen, 1900; Abh. Ver. Hamb. 16: 4; pro: Bimastos Moore, H., 1893. [N.O., p. 49]
Biprostatus Pinder et Brinkhurst, 2000; Mem. Mus. Vict. 58(1): 63; Typ: Telmatodrilus bifidus Brinkhurst et Fulton, 1979. (Tubificidae)
Biwadrilus Jamieson, 1971; Aquatic Oligo. World, p. 809; Typ: Criodrilus bathybates Stephenson, 1917. (Glossoscolecidae) [N.O., p. 49]
Blanonais Gervais, 1838; Bull. Acad. Belg. 5: 15; Typ: Ophidonais vermicularis Gervais, 1838. (Tubificidae, gen. dub.) [N.O., p. 49]
Bohadschia Hrabě, 1971; Scr. Fak. Sci. Nat. Univ. Brno 1: 215; Typ: B. pierantonii Hrabě, 1971. (Tubificidae) [N.O., p. 49]
Bohadschia Hrabě, 1971; lapsus calami pro: Scr. Fak. Sci. Univ. Brno (Biol.) debet esse 1:220; [N.O., p. 49; N.O.S.S., p. 9]
Bohemilla Vejdovský, 1883; SB Böhm. Ges., p. 218; Typ: B. comata Vejdovský, 1883. (Naididae)[N.O., p. 49]
Bohemillula Strand, 1928; Arch. Naturg. 92A: 36; nom. nov. pro: Bohemilla Vejdovský, 1883. [N.O., p. 49]
Borgertia Michaelsen, 1905; Z. wiss. Zool. 82: 330: Typ: B. papillijera Michaelsen, 1905. (Eudrilidae) [N.O., p. 49]
Borgesia James, 1991; Trans. Amer. Micros. Soc. 110(4): 341; Typ: Trigaster sedecimsetae Borges et Moreno, 1991. (Megascolecidae
[N.O.S.T., p. 8]
Botarodrilus Zicsi, 1990; Rev. Suisse Zool. 97(1): 101; Typ: B. andinus Zicsi, 1990. (Glossoscolecidae) [N.O.S.T., p. 8]
Bothrioneuron Stolč, 1886; SB Böhm. Ges., 1885, p. 647; Typ: B. vejdovskyanum Stolč, 1886. (Tubificidae) [N.O., p. 49]
Bothrioneurum Michaelsen, 1900; Das Tierreich 10: 54; pro: Bothrioneuron Stolč, 1886. [N.O., p. 49]
Boucheona Marchán, Fernández, Díaz Cosín et Novo, 2018; Invert. System. 32: 663;
Typ: Hormogaster riojana Qiu & Bouché, 1998. (Hormogastridae) ^
Brachydrilus Benham, 1888; Zool. Anz. 11: 73; Typ: B. benhami Michaelsen, 1900. (B. sp. Benham, 1888
= B. benhami Michaelsen, 1900) (Microchaetidae) [N.O., p. 49]
Branchiodrilus Michaelsen, 1900; Das Tierreich 10: 23; pro: Chaetobranchus Bourne, 1890. [N.O., p. 49]
Branchiura Beddard, 1892; Quart. J. Micros. Sci. (n.s.) 33: 325; Typ: B. sowerbyi Beddard, 1892. (Tubificidae) [N.O., p. 49]
Brasilisia Hernández-García et James, 2018; Zootaxa 4496(1): 473; Typ: Brasilisia punki Hernández-García et James, 2018.
ZooBank (Ocnerodrilidae) ^
Bratislavia Košel, 1976; Biol. Brat. 31: 105; Typ: Pristina elegans Finogenova, 1966. (Naididae) [N.O.S.P., p. 16]
Breviatria Pinder et Brinkhurst, 2000; Mem. Mus. Vict. 58(1): 57; Typ: Telmatodrilus multiprostatus Brinkhurst, 1971. (Tubificidae)
Bribri Righi, 1984; Stud. Trop. Andean Ecosystems 2: 461; Typ: B. pipi Righi, 1984. (Glossoscolecidae) [N.O.S.S., p. 7]
Brinkhurstia Jamieson, 1968; J. Zool. Lond. 155: 79; Typ: Alluroides americanus Brinkhurst, 1964. (Alluroididae) [N.O., p. 49]
Brunodrilus Righi, 1971; Zool. Anz. 186: 388; Typ: B. angeloi Righi, 1971. (Ocnerodrilidae) [N.O., p. 49]
Bryodrilus Ude, 1892; Zool. Anz. 15: 344; Typ: B. ehlersi Ude, 1892. (Enchytraeidae) [N.O., p. 49]
Bryohenlea Černosvitov, 1934; Zool. Anz. 105: 295; Typ: Bryodrilus udei Eisen, 1878. (Enchytraeidae) [N.O., p. 49]
Buchholzia Michaelsen, 1886; Arch. Mikr. Anal. 28: 293; Typ: Enchytraeus appendiculatus Buchholz, 1863. (Enchytraeidae) [N.O., p. 49]
Burchanidrilus Martin et Brinkhurst, 2008; Zool. Scripta, Vol. 27(3): 198;
Typ: Burchanidrilus petitbonum Martin et Brinkhurst, 2008. (Tubificidae)
Bursadrilus Jamieson, 2000. Native Earthworms of Australia (Megascolecidae, Megascolecinae), p. 534;
Typ: Megascolex fletcheri Michaelsen, 1907a. (Megascolecinae). Monotypic.
Buttneriodrilus Michaelsen, 1897; Mitt. Mus. Hamb. 14: 42; Typ: B. congicus Michaelsen, 1897. (Eudrilidae) [N.O., p. 49]
Bythonomus Grube, 1880; Jber. Schles. Ges. Vater. Kult. 57: 228; pro: Bathynomus Grube, 1879. [N.O., p. 49]