• Batalaria Reynolds, 1978 † (uncertain)
• Belaria Epstein, 1941 (uncertain) [Class: Protozoa (awaiting allocation)]
• Belaria Saedeleer, 1934 [Class: Monothalamea]
• Bicellaria de Blainville, 1830 accepted as Bicellariella Levinsen, 1909 [Family: Bugulidae]
• Bicellaria Macquart, 1823 [Family: Hybotidae]
• Bisetaria Karl, 1943 (uncertain) [Family: Diptera (awaiting allocation)]
• Bisetaria Van Tieghem, 1902 (uncertain) [Family: Ochnaceae]
• Bitraria † (uncertain)