Abstract
Cylindrocladiella is confirmed as distinct from Cylindrocladium . Species of Cylindrocladium are primarily distinguished from Cylindrocladiella by septate stipes, more numerously branched conidiophores, only penicillate conidiophores and Calonectria teleomorphs. Cylindrocladiella , however, has non-septate stipes, small 1-septate conidia, penicillate and subverticillate conidiophores, chlamydospores that are arranged in chains, phialides with extending, prominent collarettes, conidia in slimy masses (as opposed to clusters), strong cultural odours and Nectria teleomorphs. Six Cylindrocladiella spp. are recognized. C. peruviana is placed in synonymy with C. camelliae , while C. elegans and C. lageniformis are described as new. Gliocladiopsis is distinguished from Cylindrocladiella by the absence of a stipe, the presence of more numerous 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, and more numerous phialides per branch. Cylindrocarpon tenue is shown to be better accommodated in Gliocladiopsis , and the name G. tenuis proposed. The taxonomic position of Acontiopsis is uncertain, due to its vague generic description and the absence of type material.
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