A REEVALUATION OF CYLINDROCLADIELLA, AND A COMPARISON WITH MORPHOLOGICALLY SIMILAR GENERA

Cylindrocladiella is confirmed as distinct from Cylindrocladium. Speci es of Cylindrocladium are primarily distinguished from Cylindrocladiel la by septate stipes, more numerously branched conidiophores, only pen icillate conidiophores and Calonectria teleomorphs. Cylindrocladiella, however, has non-septate stipes, small 1-septate conidia, penicillate and subverticillate conidiophores, chlamydospores that are arranged i n chains, phialides with extending, prominent collarettes, conidia in slimy masses (as opposed to clusters), strong cultural odours and Nect ria teleomorphs. Six Cylindrocladiella spp. are recognized. C peruvian a is placed in synonymy with C. camelliae, while C. elegans and C. lag eniformis are described as new. Gliocladiopsis is distinguished from C ylindrocladiella by the absence of a stipe, the presence of more numer ous conidiophore branches and the formation of conidia in slimy yellow masses. Gliocladiopsis is distinguished from Cylindrocarpon by having uniformly cylindrical conidia, more numerous conidiophore branches, a nd more numerous phialides per branch. Cylindrocarpon tenue is shown t o be better accommodated in Gliocladiopsis, and the name G. tenuis pro posed. The taxonomic position of Acontiopsis is uncertain, due to its vague generic description and the absence of type material.