Poster Session: Molecular Plant-Microbe Interactions - Fungi and Oomycetes

681-P

Records of Entolomataceae species with cuboid basidiospores from Brazil based on morphological and multi-locus phylogenetic analyses.
F. KARSTEDT (1), S. E. Bergemann (2), M. Capelari (1)
(1) Instituto de Botânica, São Paulo, Brazil; (2) Middle Tennessee State University, Murfreesboro, TN, U.S.A.

Taxa within the Entolomataceae Kotlaba & Pouzar (Agaricales, Basidiomycota) are easily recognized by the pinkish spore deposit and by the shape of the basidiospore that is bumpy, ridged or angular with four to twelve angles in polar view. Around 100 species have eight-angled (cuboid) basidiospores and the majority of these species are placed in the genus Inocephalus (Noordel.) P.D. Orton. Despite their diversity in tropical and subtropical regions, there are very few reports documenting the diversity of cuboid species from Brazil. Recent collection efforts in the Amazonian and Atlantic regions of Brazil have yielded 24 species with cuboid basidiospores. Of these, nine are new to science, five species are new records for Brazil (Entoloma pinnum, E. roseomurinum, E. salmoneum, Inocephalus luteus and Trichopilus luteolamellatus) and six species are new records for the region (E. caribaeum, E. lycopersicum, I. cervinus, I. dragonosporus and I. murrayi). Additionally, a multilocus phylogeny of the Entolomataceae supports the placement of species with cuboid spores in a segregate, sister clade to Inocephalus species that lack cuboid spores. Analyses of the evolution of the cuboid spore type will be discussed along with an evaluation of morphological diversity of species with cuboid spores. (FAPESP 2010/10218-5)