Book of Abstracts (PDF) - International Mycological Association

IMC7 Friday August 16th Lectures
alpine and arctic mycology and numerous Cortinarii have
been described from the Northern Hemisphere associated
with Salix and Dryas. The increased exploration of tropical
fungi have brought to light quite numerous ectomycorrhizal
taxa but the number of Cortinarii remain low. Few species
are known from Congo, the Amazon area and South India
associated with leguminous and sapotaceous genera or
Dipterocarpaceae. The distribution of some special groups
like subgenus Cortinarius, subgenus Leprocybe sensu
stricto, the Cortinarius orellanus group, subgenus
Dermocybe, subgenus Phlegmacium subsection
Coleopodes, the Cortinarius salor group and others are
discussed.
402 - Species and speciation in the Hebeloma
crustuliniforme complex
D.K. Aanen 1* & T.W. Kuyper 2
1 Zoological Institute, University of Copenhagen,
universitetsparken 15, dk-2100 Copenhagen, Denmark. -
2 Soil Biology and Biological Soil Quality Group,
University of Wageningen, PO Box 8005, 6700 EC
Wageningen, The Netherlands. - E-mail: dkaanen@zi.ku.dk
Within the genus Hebeloma species have traditionally been
defined typologically by their morphological differences.
In many cases this has not lead to uncontroversial species
delimitations. An extreme example is the Hebeloma
crustuliniforme complex, where a number of species have
been described, but where the borderlines between these
species have been disputed. Here we used sexual
intercompatibility to define species within this species
complex. We found a minimum of 20 intercompatibility
groups (biological species). A phylogeny including species
of the other main groups of the genus Hebeloma shows that
the Hebeloma crustuliniforme complex consists of two
well-supported clades that together possibly do not form a
monophyletic group. Speciation is the process of becoming
a species. Under the biological species concept, speciation
can thus be defined as the origin of sexual incompatibility.
Within a monophyletic group consisting of nine closely
related ICGs belonging to the Hebeloma crustuliniforme
complex, four ICGs had varying levels of partial
incompatibility (within groups 100% compatibility,
between 0.4, 8.3 and 15.0%). We estimated phylogenies of
different individuals of these ICGs to reconstruct the
evolution of intercompatibility. Our results indicate that
generalizations between the level of intercompatibility and
genetic divergence within this species complex can not be
made.
403 - Correlations between classical systematics and
molecular phylogenetic hypotheses in the genus
Cortinarius
S. Garnica 1* , M. Weiß 1 , B. Oertel 2 & F. Oberwinkler 1
1 Universität Tübingen, Botanisches Institut, Lehrstuhl
Spezielle Botanik und Mykologie, Auf der Morgenstelle 1,
126
Book of Abstracts
D-72076 Tübingen, Germany. - 2 Universität Bonn, Institut
für Obst- und Gemüsebau, Auf dem Hügel 6, D-53121
Bonn-Endenich, Germany. - E-mail:
sigisfredo.garnica@uni-tuebingen.de
A wide spectrum of Cortinarius species from South
America, Australia, Asia and Europa were studied by
means of comparative morphology and anatomy, scanning
electron microscopy of basidiospores, and molecular
phylogenetic methods. Sequencing of both the ITS region
and the D1/D2 region of the nuclear coded large ribosomal
subunit (LSU) allowed estimation of phylogenetic
relationships both within the genus Cortinarius and also
between Cortinarius and closely related taxa. We present
results of our molecular phylogenetic analyses and discuss
them in relation to classical taxonomic concepts in
Cortinarius and our own macro- and microscopical
observations.
404 - A molecular phylogeny of Gymnopilus, using
ribosomal ITS DNA sequence data
D.A. Orlovich 1* , A.-M.B. Oliver 1 & B.J. Rees 2
1 Department of Botany, University of Otago, PO Box 56,
Dunedin, New Zealand. - 2 School of Biological Science,
University of New South Wales, Sydney, NSW 2052,
Australia. - E-mail: david.orlovich@botany.otago.ac.nz
Gymnopilus P. Karsten is a genus of wood-rotting
basidiomycetes with over 150 species distributed
worldwide. Gymnopilus produces a rusty-brown spore print
and has rough spore ornamentation, commonly without a
plage. The genus has recently been revised in Australia and
there are several detailed accounts of the genus for other
regions including Norway, North America and Great
Britain. In conjunction with an ongoing revision of New
Zealand species, we are sequencing the internal transcribed
spacer region of nuclear ribosomal DNA for phylogenetic
analyses using parsimony and maximum likelihood. We
will present a phylogeny of the genus incorporating both
southern and northern hemisphere species. There is
considerable similarity between the New Zealand and
Australian Gymnopilus flora, and several species pairs exist
that span the northern and southern hemispheres.
405 - Myconet
O.E. Eriksson
Department of Ecology and Environmental Science, Umeå
University, SE-90187 Umeå, Sweden.
Myconet MYCONET is an international project intended
for the development of a natural classification of the
Ascomycota. Relevant literature is screened and all new
data that may necessitate changes in the classification are
presented in the series Notes on ascomycete systematics (at
present c. 3500 Notes). An Outline of the Ascomycota is