Taxonomy Of Marasmius Sect. Globulares Sensu Lato From China

Marasmius Fries (1835), a common and important fungus genus in tropical andsubtropical, belongs to Marasmiaceae, Agaicales, Basidiomycota. Intensive taxonomic workwas carried out in China employing the methods of Singer19761986Wilson&Desjardin2005and Antonon2010.As a result of studing over500collections,59taxa (including species and varieties) wererecognized, including7new species and18new records to China.45taxa formerly recordedfrom China were reexamined and reviewed, four species are excluded, two species aresynonyms and5records in China are uncertain species.Akey to species was provided.Records of species M. collinus, M. rhyssophyllus, M. panerrythrus and M. phaeus wereexcluded from China for the misidentification of the specimens; the species M.poromycenoides and M. subsetiger were the synomyns of M. bekolacongoli and M. cohortalisvar. hymeniicephalus.while the recordes of M. aurantioferrugineus M. cystidiosus M.riparius M. pseudoniveus and M. subarborescens were uncertain for lacking proofspecimens.Seven species were descripted as new to science, which were M. albostipitatus, M.galbinus, M. hygrocybiformis, M. sparsifolius, M. subabundans, M. pseudograndiviridis andM. umbo-albusEighteen new records to China were discovered, i.e. M. acerosus, M. coarctatus, M.coklatus, M. corrugatus, M. floriceps, M. florideus, M. confertus var. parvisporus, M.fusicystidiosus, M. cf. grandisetulosus, M. hinnuleus, M. hypochroides, M. nivicola, M. cf.occultatiformis, M. ochraceus, M. ochroleucus, M. pellucidus, M. phlebodiscus and M.suthepensis.In virtue of some analytic methods of Maximum parsimony analysis, Mrbays andMaximun likelihood anlysis, dataset of ITS was analyzed. The results indicated that themodern Marasmius taxonomy system was not complete; Marasmius section Glubolares andsection Sicci were polyphyletic. More molecular evidences were needed for the subsectiondivision by the hymniform pileipellis composed of smooth or Siccus-type broom cells. Thecharacter smooth or striate to grooved pileus may be important in the subsection division.Further more, the distribution of Marasmius species was influence by the geographicalisolation.