1. Babylonia Schlüter 1838
2. Badister Clairville 1806
3. Badistrinus Motschulsky 1866
4. Baetis Leach 1815
5. Bakerlymnaea Weyrauch 1964
6. Balaena Linnaeus 1758
7. Balaenoptera Lacépède 1804
8. Balanophyllia Wood 1844
9. Balanus Costa 1778
10. Bambusicola Gould 1863
11. Banjos Bleeker 1876
12. Barbatia Gray 1842
13. Barbatura H. F. Linck 1790
14. Barbuligobius Lachner & McKinney 1974
15. Basiliola Dall 1908
16. Basiliolella d'Hondt 1987
17. Basilometra A.H. Clark 1936
18. Bytholeucon Watling 1991
19. Bathycallionymus Nakabo 1982
20. Bathycuma Hansen 1895
21. Bathygobius Bleeker 1878
22. Bathyplotes Östergren 1896
23. Batillaria Benson 1842
24. Batrachuperus Boulenger 1878
25. Baylisascaris Sprent 1968
26. Bekkochlamys Habe 1958
27. Beleses Cameron 1877
28. Bellamya Jousseame 1886
29. Bembidion Latreille 1802
30. Bembras G. Cuvier 1829
31. Benthesicymus Bate 1881
32. Berberis Linné
33. Beringobdella Caballero 1974
34. Beroe Gronov 1760
35. Berosus Leach 1817
36. Beryx G. Cuvier 1829
37. Betta Bleeker 1850
38. Betula Linné
39. Biacanthus Tang & Izawa 2005
40. Bidens Linné
41. Biorhiza Westwood 1840
42. Birgus Leach 1816
43. Birka Malaise 1944
44. Biston Leach 1815
45. Bivesicula Yamaguti 1934
46. Biwia D.S. Jordan & Fowler 1903
47. Blenniella Reid 1943
48. Blepsias Cuvier 1829
49. Boccardia Carazzi 1895
50. Bodianus Bloch 1790
51. Bohadschia Jäger 1833
52. Boleophthalmus Valenciennes 1837
53. Bolinopsis L. Agassiz 1860
54. Boltenia Savigny 1816
55. Bombus Latreille 1802
56. Bombycilla Vieillot 1808
57. Borostomias Regan 1908
58. Borrelia Swellengrebel 1907
59. Bos Linnaeus 1758
60. Bothriocephalus Rudolphi 1808
61. Bothriomyrmex Emery 1869
62. Bothus Rafinesque 1810
63. Bourgelatia Railliet, Henry & Bauche 1919
64. Brachidontes Swainson 1840
65. Brachinus Weber 1801
66. Brachiones Thomas 1925
67. Brachyponera Emery 1900
68. Brachylaima Dujardin 1843
69. Brachymeria Westwood 1829
70. Brachyteles Spix 1823
71. Bradybaena Beck 1837
72. Bradycellus Erichson 1837
73. Branchiomma Kölliker 1858
74. Branchiostegus Rafinesque 1815
75. Brevistriata Travassos 1937
76. Brissus Gray 1825
77. Broscosoma Rosenhauer 1846
78. Brotula Cuvier 1829
79. Brugia Buckley 1959
80. Bruguiera Lamarck
81. Bryocamptus Chappuis 1928
82. Bryocoris Fallen 1829
83. Bryophilocapsus Yasunaga 2000
84. Bubulcus Bonaparte 1855
85. Buccinum Linnaeus 1758
86. Bucephalus von Baer 1827
87. Buceros Linnaeus 1758
88. Bufo Laurenti 1768
89. Bunostomum Railliet 1902
90. Burmirhynchia Buckman 1917
91. Bursa Röding 1798
92. Butastur Hodgson 1843
93. Buteo Lacépède 1799
94. Butorides Blyth 1852
95. Byasa Moore 1882