Key to Corniculariella species

1. Sterile setae intermixed with conidiophores....................................................................................................... C. harpographoidea

1*. Sterile setae absent. ............................................................................................................................................................................2

2. Conidia bearing an apical appendage............................................................................................................................. C. hystricina

2*. Conidia without appendages...............................................................................................................................................................3

3. Conidia three or more septate.............................................................................................................................................................4

3*. Conidia one septate.............................................................................................................................................................................5

4. Conidia three septate ................................................................................................................................................ C. queenslandica

4*. Conidia 7–10 septate ............................................................................................................................................................ C. abietis

5. Conidia less than 20 µm .....................................................................................................................................................................6

5*. Conidia more than 20 µm...................................................................................................................................................................7

6. Conidia 10–13 × 2–3 µm....................................................................................................................................................... C. populi

6*. Conidia 13–17 × 3.5 µm.…........................................................................................................................................... C. brasiliensis

7. Conidia 40–60 × 3.5–4.5 µm..................................................................................................................................... C. pseudotsugae

7*. Conidia 50–60 × 3–4 µm........................................................................................................................................................ C. spina

7**. Conidia 60–72 × 3–4 µm..................................................................................................................................................... C. urceola