Evolutionary relationships of Heimioporus and Boletellus (Boletales), with an emphasis on Australian taxa including new species and new combinations in Aureoboletus, Hemileccinum and Xerocomus
Roy E. Halling A H , Nigel Fechner B , Mitchell Nuhn C , Todd Osmundson D , Kasem Soytong E , David Arora F , Manfred Binder G and David Hibbett C
+ Author Affiliations
- Author Affiliations
A Institute of Systematic Botany, The New York Botanical Garden, Bronx, NY 10458-5126, USA.
B Queensland Herbarium, Mt Coot-tha Road, Toowong, Brisbane, Qld 4066, Australia.
C Department of Biology, Clark University, Worcester, MA 01610-1477, USA.
D Department of Biology, 3034 Cowley Hall, University of Wisconsin – La Crosse, 1725 State Street, La Crosse, WI 54601, USA.
E Faculty of Agricultural Technology, King Mongkut’s Institute of Technology, Ladkrabang, Bangkok, Thailand.
F PO Box 672, Gualala, CA 95445, USA.
G Asam Strasse 50, D-93352 Rohr in Niederbayern, Germany.
H Corresponding author. Email: rhalling@nybg.org
Australian Systematic Botany 28(1) 1-22 https://doi.org/10.1071/SB14049
Submitted: 13 December 2014 Accepted: 17 February 2015 Published: 10 September 2015
Abstract
Boletellus and Heimioporus, two genera of Boletaceae with ornamented basidiospores, are shown to be distinct genera on the basis of phylogenetic analyses of nuclear ribosomal large-subunit and translation elongation-factor 1α DNA sequences. Comparison of spore ornamentation type – longitudinally ribbed in Boletellus v. punctate, alveolate-reticulate in Heimioporus – are further evidence for distinction. Analyses of multiple accessions from the Americas, Asia and Australia support the monophyly of Heimioporus and a ‘core Boletellus’ clade, containing the type species, B. ananas (M.A.Curt.) Murrill, and approximately seven additional species. Tests of alternative phylogenetic topologies could not reject monophyly of a more inclusive group containing the core Boletellus clade and six other species. Heimioporus australis Fechner & Halling, H. cooloolae Fechner & Halling, Boletellus deceptivus Halling & Fechner, B. reminiscens Halling & Fechner and B. sinapipes Fechner, K.Syme, R.Rob. & Halling are described as new species. Phylogenetic analyses also support the following new combinations: Aureoboletus projectellus (Murrill) Halling, A. mirabilis (Murrill) Halling, Hemileccinum subglabripes (Peck) Halling and the new name, Xerocomus tenax Nuhn & Halling.
Additional keywords: biogeography, boletes, Boletineae, phylogeny, ribosomal DNA, translation elongation-factor 1α.
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