Colletogloeopsis, a new coelomycete genus to accommodate anamorphs of two species of Mycosphaerella on Eucalyptus

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Abstract
Species in Colletogloeopsis are characterized by having acervular conidiomata, and brown, verruculose, thick-walled, aseptate conidia that are formed on brown, verruculose conidiogenous cells that proliferate sympodially or percurrently. Colletogloeum nubilosum, the anamorph of Mycosphaerella cryptica, is transferred to Colletogloeopsis. Colletogloeopsis molleriana is described for the anamorph of Mycosphaerella molleriana, formed from single ascospore isolations obtained from collections of Eucalyptus globulus leaves from Portugal and California, United States. Mycosphaerella molleriana is redescribed and distinguished from Mycosphaerella nubilosa, which was earlier regarded to be synonymous with the former. Key words: Colletogloeum, Mycosphaerella leaf blotch, systematics.