- Diadasia afflicta -- Melissodes afflicta Cresson, 1878
- Diadasia afflictula
- Diadasia albovestita
- Diadasia andina -- Leptometria andina Holmberg, 1903
- Diadasia angusticeps
- Diadasia australis -- Melissodes australis Cresson, 1878
- Diadasia baeri -- Ancyloscelis baeri Vachal, 1904
- Diadasia baraderensis -- Leptometria baraderensis Holmberg, 1903
- Diadasia bituberculata -- Melissodes bituberculata Cresson, 1878
- Diadasia bosqi -- Leptometria bosqi Moure, 1947
- Diadasia chilensis -- Anthophora chilensis Spinola, 1851
- Diadasia consociata
- Diadasia diminuta -- Melissodes diminuta Cresson, 1878
- Diadasia distinguenda -- Anthophora distinguenda Spinola, 1851
- Diadasia enavata -- Melissodes enavata Cresson, 1872
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