title: Identification of a new order of root-colonising fungi in the Entorrhizomycota: Talbotiomycetales ord. nov. on eudicotyledons.
abstract: The recently described fungal phylum Entorrhizomycota was established solely for the genus Entorrhiza, species of which cause root-galls in Cyperaceae and Juncaceae. Talbotiomyces calosporus (incertae sedis) shares morphological characteristics and an ecological niche with species of Entorrhiza. We investigated the higher classification of T. calosporus to determine whether it belongs in Entorrhizomycota. Ribosomal DNA sequences showed Talbotiomyces to be a close relative of Entorrhiza and both taxa form a highly supported monophyletic group. Based on molecular phylogenetic analyses and in congruence with existing morphological and ecological data, Entorrhiza and Talbotiomyces represent a deep dichotomy within the Entorrhizomycota. While species of Entorrhiza are characterised by dolipores and occur on monocotyledons, members of Talbotiomyces are characterised by simple pores and are associated with eudicotyledons. This expands the host range of the recently described Entorrhizomycota from Poales to other angiosperms. Higher taxa, namely Talbotiomycetales ord. nov. and Talbotiomycetaceae fam. nov., are proposed here to accommodate Talbotiomyces.
authors.affiliation: University of Tübingen, Institute of Evolution and Ecology, Plant Evolutionary Ecology, Auf der Morgenstelle 1, 72076 Tübingen, Germany;
authors.forename: Kai
authors.initials: K
authors.lastname: Riess
authors.affiliation: University of Tübingen, Institute of Evolution and Ecology, Plant Evolutionary Ecology, Auf der Morgenstelle 1, 72076 Tübingen, Germany;
authors.forename: Robert
authors.initials: R
authors.lastname: Bauer
authors.affiliation: The Sainsbury Laboratory, Norwich Research Park, Norwich, NR4 7UH, UK.
authors.forename: Ronny
authors.initials: R
authors.lastname: Kellner
authors.affiliation: Forestry and Agricultural Biotechnology Institute, University of Pretoria, Cnr Lynnwood and University Road, Hatfield 0083, Pretoria, South Africa.
authors.forename: Martin
authors.initials: M
authors.lastname: Kemler
authors.affiliation: W. Szafer Institute of Botany of the Polish Academy of Sciences, Department of Mycology, Lubicz 46, PL-31-512 Kraków, Poland.
authors.forename: Marcin
authors.initials: M
authors.lastname: Piątek
authors.affiliation: Gabriel-Biel-Straße 5, 72076 Tübingen, Germany.
authors.forename: Kálmán
authors.initials: K
authors.lastname: Vánky
authors.affiliation: University of Bochum, AG Geobotanik, Universitätsstraße 150, 44780 Bochum, Germany.
authors.forename: Dominik
authors.initials: D
authors.lastname: Begerow
keywords: Entorrhiza; Talbotiomyces; fungal evolution; molecular phylogeny; root galls