Neodeightonia species known from culture can be separated on conidial morphology.
1. Conidia hyaline, aseptate, becoming pigmented................................................................................................................................2
1. Conidia hyaline, aseptate, becoming pigmented and septate.............................................................................................................4
2. Conidia never longer than 13.5 μm, 9–13.5 μm long.................................................................................................... N. subglobosa
2. Conia longer than 13 μm....................................................................................................................................................................3
3. Conidia never shorter than 13 μm, 13–20 μm long....................................................................................................... N. rattanicola
3. Conidia never shorter than 19 μm, 19–22 μm long.......................................................................................................... N. rattanica
4. Pigmented conidia without longitudinal striations.............................................................................................................. N. septata
4. Pigmented conidia with longitudinal striations..................................................................................................................................5
5. Conidia less than 13 μm long, 6.8–12.4 μm long.................................................................................................. N. chamaeropicola
5. Conidia longer than 14 μm.................................................................................................................................................................6
6. Pigmented conidia up to 3-septate.................................................................................................................................. N. licuriensis
6. Pigmented conidia 1-septate...............................................................................................................................................................7
7. Conidia never longer than 21.5 μm, 15.5–21.5 μm long.............................................................................................. N. phoenicum 1
7. Conidia up to 24.5 μm long, 17.5−24.5 μm long........................................................................................................... N. palmicola 1