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ABSTRACT
A new genus in the Hypocreales, Leuconectria, is described for Pseudonectria clusiae based on its unique perithecial wall anatomy and the anamorph Gliocephalotrichum bulbilium produced from single ascospores of L. clusiae. The teleomorph had previously been placed in Pseudonectria, a genus defined for Nectria-like species with nonseptate ascospores. Pseudonectria is redefined based on the type species P. rousseliana and its anamorph Volutella buxi. Pseudonectria rousseliana causes a disease of boxwood (Buxus sempervirens) in the Buxaceae. The two other species included in Pseudonectria, P. coronata and P. pachysandricola, also occur on members of the Buxaceae. All three species are described and illustrated, and a key to species is provided.
