Spegazzinia species

Mena-Portales, Julio, Cantillo-Pérez, Taimy & Minter, David W., 2017, A new species of the conidial fungal genus Spegazzinia (Pleosporales, Didymosphaeriaceae) collected on sugarcane in Cuba, Phytotaxa 331 (2), pp. 295-298 : 297

Key to Spegazzinia species

1. Conidia of one kind ............................................................................................................................................................................2

1’. Conidia of two kind............................................................................................................................................................................5

2. Conidia cruciately septate, 4-celled, dentate at the margin ............................................................................................ S. intermedia

2’. Conidia mostly not cruciately septate, with a variable number of cells, not dentate at the margin ...................................................3

3. Conidia piryform to turbinate, with the basal cell obconic ...................................................................................... S. subramanianii

3’. Conidia not as above ..........................................................................................................................................................................4

4. Conidia usually broadly ellipsoidal to subglobose, 8-celled, composed for two tiers of four cells each............................. S. parkeri

4’. Conidia ellipsoidal, usually 5-celled, with 3 transversal septa and one situated in one of the central cells… ......... S.xanthorrhoeae

5. Conidia of type “b” cruciately septate, 4-celled.................................................................................................................................6

5’. Conidia of type “b” no cruciately septate, 8–celled ......................................................................................................... S.deightonii

6. Conidia of type “b” lobed...................................................................................................................................................................7

6’. Conidia of type “b” not lobed.......................................................................................................................................... S. tessarthra

7. Conidia of type “b” somewhat angular and irregularly lobed............................................................................................................8

7’. Conidia of type “b” characteristically lobed ...................................................................................................................... S. lobulata

8. Conidia of type “b” without ornamentation ........................................................................................................................ S. sundara

8’. Conidia of type “b” ornamented.........................................................................................................................................................9

9. Conidia of type “b” smooth or finely spinulose, 15–18 x 13–18 μm............................................................................... S. flabellata

9’. Conidia of type “b” always with short and blunt spines, 18–24 x 16–22 μm ........................................................................ S. affinis