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Amphilogia gen. nov. for Cryphonectria-like fungi from Elaeocarpus spp. in New Zealand and Sri Lanka

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Abstract:

The ascomycete genera Cryphonectria and Endothia are closely related members of Diaporthales. Recent DNA sequence comparisons have shown that isolates from Elaeocarpus spp. in New Zealand, previously identified as Cryphonectria radicalis and Cryphonectria gyrosa, represent a phylogenetic group distinct from those including other species of Cryphonectria and Endothia. Cryphonectria gyrosa applies to a species that occurs on Elaeocarpus glandulifer in Sri Lanka, the same host genus but a different species from which the New Zealand collections were made. The aim of this study was to provide a name for the fungi residing in the phylogenetic group from New Zealand. Morphological characters that define these fungi include superficial conical conidiomata, conidia of variable size, and ascospores with one to three septa. These characteristics are not found in other species of Cryphonectria. We also recognise a second species in the group from New Zealand that has distinctly larger ascospores. Herbarium specimens of C. gyrosa exhibit the same primary characteristics as the specimens from New Zealand and C. gyrosa is regarded as conspecific with one of the species in the New Zealand collections. A new genus, Amphilogia, is described for the collections of C. gyrosa from Sri Lanka and New Zealand, which also contains the second species from New Zealand, Amphilogia major sp. nov.

Keywords: AMPHILOGIA GYROSA; AMPHILOGIA MAJOR; CRYPHONECTRIA; DIAPORTHALES; ELAEOCARPUS; ENDOTHIA; NEW ZEALAND

Document Type: Research Article

Affiliations: 1: Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria 0002, South Africa 2: National Botanical Institute, KwaZulu-Natal Herbarium, P.O. Box 52099, Berea Road, Durban 4007, South Africa 3: Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria 0002, South Africa

Publication date: 2005-11-01

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