Abstract
The fungal genera Actiniopsis, Ijuhya, Neohenningsia, Ophiodictyon, Peristomialis, and Nectria are discussed. Actiniopsis and Ophiodictyon are non-hypocreaceous, lichenised pyrenomycetes. Ijuhya, Neohenningsia, and Peristomialis are relegated to synonymy with Nectria. Nectria pertusoides sp. nov., N. freycinetii sp. nov., N. phormiicola sp. nov., N. peristomialis (Berkeley & Broome) Samuels comb. nov., N. dentifera sp. nov., and N. arenuloides sp. nov. are described and illustrated. Nectria peziza (Tode ex Fries) Fries, N. cyathea Dingley, N. pertusa Patouillard, N. vulpina (Cooke) Ellis, N. sylvana Mouton, and N. manuka Dingley are described from collections made in New Zealand. All species were cultured from ascospores and produced Acremonium spp. conidial states. A key to these species of Nectria and their Acremonium conidial states is presented.

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