IMA Fungus (2014) 5, 173-193

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Pedro W. Crous, William Quaedvlieg, Karen Hansen, David L. Hawksworth and Johannes Z. Groenewald (2014)
Phacidium and Ceuthospora (Phacidiaceae) are congeneric: taxonomic and nomenclatural implications
IMA Fungus 5 (2), 173-193
Abstract: The morphologically diverse genus Ceuthospora has traditionally been linked to Phacidium sexual morphs via association, though molecular or cultural data to confirm this relationship have been lacking. The aim of this study was thus to resolve the relationship of these two genera by generating nucleotide sequence data for three loci, ITS, LSU and RPB2. Based on these results, Ceuthospora is reduced to synonymy under the older generic name Phacidium. Phacidiaceae (currently Helotiales) is suggested to constitute a separate order, Phacidiales (Leotiomycetes), as sister to Helotiales, which is clearly paraphyletic. Phacidiaceae includes Bulgaria, and consequently the family Bulgariaceae becomes a synonym of Phacidiaceae. Several new combinations are introduced in Phacidium, along with two new species, P. pseudophacidioides, which occurs on Ilex and Chamaespartium in Europe, and Phacidium trichophori, which occurs on Trichophorum cespitosum subsp. germanicum in The Netherlands. The generic name Allantophomopsiella is introduced to accommodate A. pseudotsugae, a pathogen of conifers, while Gremmenia is resurrected to accommodate the snow-blight pathogens of conifers, G. abietis, G. infestans, and G. pini-cembrae.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Pedro W. Crous, W. Quaedvlieg, Johannes Z. Groenewald

Research topic(s) for pests/diseases/weeds:
identification/taxonomy


Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Allantophomopsiella pseudotsugae Germany
Allantophomopsiella pseudotsugae Spruce (Picea) Norway
Allantophomopsiella pseudotsugae Pine (Pinus) Netherlands
Allantophomopsiella pseudotsugae Pine (Pinus) Norway
Allantophomopsiella pseudotsugae Douglas fir (Pseudotsuga menziesii) Norway
Gremmenia infestans Spruce (Picea) Sweden
Gremmenia infestans Pine (Pinus) Sweden
Phacidiopycnis piri Pear (Pyrus) Netherlands
Phacidium lacerum Juniper (Juniperus) France