Fistulina pumiliae, una nueva especie asociada a Nothofagus pumilio en Patagonia (Argentina)

GONZALEZ GC; BARROETAVEÑA, C.; VISNOVSKY SB; M. RAJCHENBERG; PILDAIN MB

Santiago

Congreso; X Congreso Latinoamericano de Micología.; 2020

Asociación latinoamericana de micología

Fistulina Bull. is a poroid genusof wood-rooting fungi that includes annual and edible species. Nine species arecurrently accepted: F. hepatica, F. subhepatica B.K. Cui & J Song and F.guzmanii Brusis associated to the temperate regions of Europe, China andNorth and Central America, and F. spiculifera (Cooke) D.A. Reid, F. rosea Mont., F. africana Van der Byl, F. tasmanica B.K. Cui & Y.F. Sun, F. antarctica Speg. and F.endoxantha Speg. reported from the Southern Hemisphere. In Patagonia, both F.anctartica and F. endoxantha,grow on live and dead wood and stumps of native Nothofagus trees, and are recognized as edible mushrooms withancestral use by the local Mapuche – Tehuelche communities. In this study, adetailed account of Fistulina inPatagonia (Argentina) is presented based on an integrative analysis ofphylogenetic, morphological and host relationships data analysis. The survey included the collection of Fistulina specimens in Nothofagus forests from Neuquén, RioNegro and Chubut provinces in Patagonia, Argentina. Sequences of the internaltranscribed spacer (ITS) and large subunit (LSU) were generated and analyzed.Macro and micromorphology characterization were performed, culture macro andmicro-morphology were characterized and host associations were recorded. The phylogeneticanalyses revealed that the Patagonian species form a strongly supported grouptogether with species from the Southern Hemisphere. Within this group, thePatagonian collections formed three strongly supported species-level lineages: F. antarctica lineage, along withanother sequence extracted from the databases for this species; the F. endoxantha lineage in a basalposition of the Southern Hemisphere cluster; a new phylogenetic groupcharacterized as a new species, named Fistulina pumiliae,  entirely represented by Patagoniancollections from Nothofagus pumiliohost. The morphological characteristic that identifies the proposed new taxonare the distinguishing ochre to brown colour of its basidiomata, and the largerspore size compared to the other recorded species.