Studies in Mycology (2013) 75, 1-36

J. de Gruyter, J.H.C. Woudenberg, M.M. Aveskamp, G.J.M. Verkley, J.Z. Groenewald and P.W. Crous (2013)
Redisposition of phoma-like anamorphs in Pleosporales
Studies in Mycology 75, 1-36
Abstract: The anamorphic genus Phoma was subdivided into nine sections based on morphological characters, and included teleomorphs in Didymella, Leptosphaeria, Pleospora and Mycosphaerella, suggesting the polyphyly of the genus. Recent molecular, phylogenetic studies led to the conclusion that Phoma should be restricted to Didymellaceae. The present study focuses on the taxonomy of excluded Phoma species, currently classified in Phoma sections Plenodomus, Heterospora and Pilosa. Species of Leptosphaeria and Phoma section Plenodomus are reclassified in Plenodomus, Subplenodomus gen. nov., Leptosphaeria and Paraleptosphaeria gen. nov., based on the phylogeny determined by analysis of sequence data of the large subunit 28S nrDNA (LSU) and Internal Transcribed Spacer regions 1 and 2 and 5.8S nrDNA (ITS). Phoma heteromorphospora, type species of Phoma section Heterospora, and its allied species Phoma dimorphospora, are transferred to the genus Heterospora stat. nov. The Phoma acuta complex (teleomorph Leptosphaeria doliolum), is revised based on a multilocus sequence analysis of the LSU, ITS, small subunit 18S nrDNA (SSU), β-tubulin (TUB), and chitin synthase 1 (CHS-1) regions. Species of Phoma section Pilosa and allied Ascochyta species were determined to belong to Pleosporaceae based on analysis of actin (ACT) sequence data. Anamorphs that are similar morphologically to Phoma and described in Ascochyta, Asteromella, Coniothyrium, Plectophomella, Pleurophoma and Pyrenochaeta are included in this study. Phoma-like species, which grouped outside the Pleosporineae based on a LSU sequence analysis, are transferred to the genera Aposphaeria, Paraconiothyrium and Westerdykella. The genera Medicopsis gen. nov. and Nigrograna gen. nov. are introduced to accommodate the medically important species formerly known as Pyrenochaeta romeroi and Pyrenochaeta mackinnonii, respectively.
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(original language: English)
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Database assignments for author(s): Johannes Z. Groenewald, Pedro W. Crous, Joyce H.C. Woudenberg

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

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Plenodomus tracheiphilus	Citrus (genus)	Italy
	Plenodomus tracheiphilus	Citrus (genus)	Israel
	Subplenodomus drobnjacensis	Eustoma (crop)	Netherlands
	Subplenodomus drobnjacensis	Gentiana (crop)	Netherlands
	Plenodomus lingam
	Coniothyrium glycines	Soybean (Glycine max)	Zambia
	Coniothyrium glycines	Soybean (Glycine max)	Zimbabwe