@ARTICLE{TreeBASE2Ref23014, author = {Naritsada Thongklang and Rizwana Nawaz and Abdul N Khalid and jie Chen and Kevin D Hyde and Rui_Lin Zhao and Luis A Parra and Muhammad Hanif and Magalie Moinard and Philippe Callac}, title = {Morphological and molecular characterization of three Agaricus species from tropical Asia (Pakistan, Thailand) reveals a new group in section Xanthodermatei}, year = {2014}, keywords = {basidiomycota, morphology, new species, phylogeny, tropical biodiversity}, doi = {}, url = {http://}, pmid = {}, journal = {Mycologia}, volume = {}, number = {}, pages = {}, abstract = {The genus Agaricus is known for its medicinal and edible species, but also includes toxic species which belong to the section Xanthodermatei. Previous phylogenetic reconstruction based on ITS sequence data from temperate species had revealed two major groups in this section and a possible third lineage for A. pseudopratensis. Recent research in Agaricus has shown that classifications need improving with the addition of tropical taxa. This study adds new tropical collections to the section Xanthodermatei. We describe three species from collections made in Pakistan and Thailand and include them in a larger analysis using all available ITS data for section Xanthodermatei. Agaricus bisporiticus sp. nov. and A. fuscopunctatus sp. nov. are introduced based on molecular and morphological studies, while A. microvolvatulus is recorded for the first time in Asia. Specimens from Thailand however, have a much larger pileus than the type specimens from Congo. In ML and MP phylogenetic analyses these three species cluster with A. pseudopratensis from the Mediterranean area and A. murinocephalus recently described from Thailand. In Agaricus section Xanthodermatei this new group is monophyletic and receives low bootstrap support, while the two previously known groups receive strong support. Within the new group, the most closely related species share some traits, but we did not find any unifying morphological character; however the five species of the group share a unique short nucleotide sequence. Two putatively toxic species of section Xanthodermatei are now recognized in Pakistan and six in Thailand.} }

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