title: Extensive characterization of the new genus Rickiopora (Polyporales).
abstract: Ceriporiopsis latemarginata and Antrodiella angulatopora are two Neotropical polypores that are very similar morphologically and are characterized by effused-reflexed basidiomes, large angular pores, small ellipsoid to ovoid basidiospores and a monomitic hyphal system with presence of thick-walled hyphae with infrequent clamps. In order to verify the evolutionary relations of C. latemarginata and to find its taxonomic placement, morphological, biological, and phylogenetic studies were carried out, as well as comparisons with Antrodiella s.s. and Ceriporiopsis s.s. Mono- and poly-sporic cultures were obtained and used for mating system and nuclear behaviour studies, as well as for DNA sequence analyses of the internal transcribed spacer and large subunit of ribosomal RNA gene, translation elongation factor 1-alpha gene and RNA polymerase II second largest subunit-like gene. Type specimens of C. latemarginata and A. angulatopora were morphologically examined and their synonymy was confirmed. The results obtained support the description of a new polypore genus Rickiopora in the residual polyporoid clade characterized by a bipolar mating system, an astatocoenocytic nuclear behaviour, and a monomitic hyphal system that display a metachromatic reaction in cresyl blue.
authors: Núcleo de Pesquisa em Micologia, Instituto de Botânica, Av. Miguel Estefano 3687, 04301-90 São Paulo, SP, Brazil. Electronic address: maurowestphalen@yahoo.com.br.
authors: Mauro C
authors: MC
authors: Westphalen
authors: Área de Protección Forestal, Centro de Investigación y Extensión Forestal Andino Patagónico, C.C. 14, 9200 Esquel, Chubut, Argentina. Electronic address: mrajchenberg@ciefap.org.ar.
authors: Mario
authors: M
authors: Rajchenberg
authors: Faculty of Forestry and Wood Technology, Mendel University in Brno, Zemědělská 3, CZ-61300, Czech Republic. Electronic address: tomsovsk@mendelu.cz.
authors: Michal
authors: M
authors: Tomšovský
authors: Núcleo de Pesquisa em Micologia, Instituto de Botânica, Av. Miguel Estefano 3687, 04301-90 São Paulo, SP, Brazil.
authors: Adriana M
authors: AM
authors: Gugliotta
mesh_terms: D016000:Cluster Analysis; D004271:DNA, Fungal / Q000737:chemistry / Q000235:genetics; D021903:DNA, Ribosomal Spacer / Q000737:chemistry / Q000235:genetics; D049770:Genes, Mating Type, Fungal; D008853:Microscopy; D020648:Peptide Elongation Factor 1 / Q000235:genetics; D010802:Phylogeny; D020072:Polyporales / Q000145:classification* / Q000166:cytology / Q000235:genetics / Q000302:isolation & purification*; D012319:RNA Polymerase II / Q000235:genetics; D017422:Sequence Analysis, DNA
chemical_list: D004271:DNA, Fungal; D021903:DNA, Ribosomal Spacer; D020648:Peptide Elongation Factor 1; D012319:RNA Polymerase II
keywords: Mating system; Neotropical fungi; Nuclear behaviour; Residual polyporoid clade; Taxonomy