Approximate phenetic key to the species of the E. spinifera cladea

No.CharacteristicITS cluster
1aConidiogenesis preponderantly annellidic2
1bConidiogenesis preponderantly sympodial9
2aErect, multicellular conidiophores present that are darker than the supporting mycelium3
2bErect, dark, multicellular conidiophores absent4
3aAnnellated zones long with clearly visible, frilled annellations E. spinifera
3bAnnellated zones inconspicuous, degenerate E. attenuata
4aMature conidiogenous cells rocket shaped, slightly darker than the supporting hyphae, with regular, tapering annellated zone E. jeanselmei
4bMature conidiogenous cells otherwise remaining concolorous with supporting hyphae5
5aConidiogenous cells intercalary, conidia being produced from repent hyphae E. lecanii-corni
5bConidiogenous cells intercalary and lateral, the latter being elongate, flask to rocket shaped6
6aBudding cells only; hyphal fragments mostly without marked conidiation E. exophialae
6bHyphae producing conidia are preponderant7
7aAnnellated zones minute, tooth shaped E. heteromorpha
7bAnnellated zones having the appearance of inconspicuous flat scars8
8aLarge chlamydospore-like cells present E. nishimurae
8bChlamydospore-like cells absent E. oligosperma
9aDark-brown, thick-walled conidiophores present10
9bConidiophores only slightly darker than the remaining mycelium11
10aConidiophores unbranched R. anceps
10bConidiophores composing a basitously branched system R. basitonum
11aConidia broadly ellipsoidal, pale brown R. aquaspersa
11bConidia cylindrical, hyaline R. atrovirens; R. similis
  • a For reliable species identification, ITS rDNA sequencing remains necessary.