| Name | Microsphaera euonymi-japonici Viennot-Bourgin |
| Authorship | Viennot-Bourgin |
| Rank | Species |
| NomenclaturalStatus | LaterHomonym |
| Placed in | Microsphaera Léveillé |
| Citation | 1968 Bull. Trimestriel Soc. Mycol. France 84: 118 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Microsphaera euonymi-japonici Viennot-Bourgin |
| Identification made in | [no date] (1), 1985 (1) |