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Stud Mycol 55(1): 99-131 2006
Copyright © 2006 CBS Fungal Biodiversity Centre
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Phylogenetic reassessment of Mycosphaerella spp. and their anamorphs occurring on Eucalyptus. II.

Pedro W. Crous1,*, Michael J. Wingfield2, J. Pedro Mansilla3, Acelino C. Alfenas4 and Johannes Z. Groenewald1

1 Centraalbureau voor Schimmelcultures, Fungal Biodiversity Centre, P.O. Box 85167, 3508 AD, Utrecht, The Netherlands
2 Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, 0002, South Africa
3 Estación Fitopatológica "Do Areeiro" Subida a la Robleda S/N E-36153 Pontevedra, Spain
4 Departemento de Fitopatologia, Universidade Federal de Viçosa, 36.570 Viçosa, MG, Brazil

* Correspondence: Pedro W. Crous, crous{at}cbs.knaw.nl

Species of Eucalyptus are widely planted as exotics in the tropics and Southern Hemisphere and to some extent in southern Europe, for timber and fibre production. Species of Mycosphaerella are commonly associated with leaves and twigs of Eucalyptus and can result in defoliation, dieback, and even tree death. In the present study, numerous isolates of Mycosphaerella species were collected from leaf litter, living leaves exhibiting leaf spot symptoms or severe Mycosphaerella leaf blotch symptoms. Isolates were compared based on DNA sequence data for the internal transcribed spacer region (ITS1 & ITS2) and the 5.8S gene. These data, together with characteristics of the fungal growth on three different media, morphology of the anamorph and teleomorph structures as well as ascospore germination patterns were used to describe 21 new species.

Taxonomic novelties: Colletogloeopsis stellenboschiana Crous sp. nov., Mycosphaerella davisoniellae Crous sp. nov. (anamorph Davisoniella eucalypti H.J. Swart), Mycosphaerella eucalyptorum Crous & M.J. Wingf. sp. nov. Mycosphaerella gamsii Crous sp. nov., Mycosphaerella perpendicularis Crous & M.J. Wingf. sp. nov., Mycosphaerella pluritubularis Crous & J.P. Mansilla sp. nov., Mycosphaerella pseudafricana Crous & T. Coutinho sp. nov., Mycosphaerella pseudocryptica Crous sp. nov. (anamorph Colletogloeopsis sp.), Mycosphaerella pseudoendophytica Crous & G. Hunter sp. nov. (anamorph Pseudocercosporella sp.), Mycosphaerella pseudosuberosa Crous & M.J. Wingf. sp. nov. (anamorph Trimmatostroma sp.), Mycosphaerella quasicercospora Crous & T. Coutinho sp. nov., Mycosphaerella scytalidii Crous & M.J. Wingf. sp. nov. (anamorph Stenella sp., synanamorph, Scytalidium-like.), Mycosphaerella secundaria Crous & A.C. Alfenas sp. nov., Mycosphaerella stramenti Crous & A.C. Alfenas sp. nov., Mycosphaerella stramenticola Crous & A.C. Alfenas sp. nov., Mycosphaerella sumatrensis Crous & M.J. Wingf. sp. nov., Mycosphaerella verrucosiafricana Crous & M.J. Wingf. sp. nov., Septoria eucalyptorum Crous sp. nov., Septoria provencialis Crous sp. nov., Stenella pseudoparkii Crous & M.J. Wingf. sp. nov. (teleomorph Mycosphaerella sp.), Stenella xenoparkii Crous & M.J. Wingf., sp. nov. (teleomorph Mycosphaerella sp.).

Keywords Ascomycetes / Colletogloeopsis / Davisoniella / DNA sequence comparisons / Mycosphaerella / Pseudocercospora / Pseudocercosporella / Scytalidium / Septoria / Stenella / systematics / Trimmatostroma




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