• Radwinia Shasky, 1970 † (uncertain)
• Rankinia Wells & Wellington, 1983
• Redinia Girault, 1936 accepted as Tetrastichus Haliday, 1844
• Redonia C.W. Dodge, 1973 [Family: Physciaceae]
• Redonia Rouault, 1851 † [Family: Redoniidae]
• Reinia Franchet & Savatier, 1878 accepted as Itea Linnaeus, 1753 [Family: Iteaceae]
• Reinia Kobelt, 1876 [Family: Clausiliidae]
• Retinia Guenée, 1845
• Riedlinia Oudemans, 1914
• Rodinia Westwood in Doubleday & Westwood, 1851
• Rudinia Muir-Wood & Cooper, 1960 † accepted as Desmoinesia Hoare, 1960 †