A new section and species of AgaricussubgenusPseudochitonia from Thailand Author He, Mao-Qiang Author Chuankid, Boontiya Author Hyde, Kevin D. Author Ratchadawan Cheewangkoon, Author Zhao, Rui-Lin text MycoKeys 2018 40 53 67 http://dx.doi.org/10.3897/mycokeys.40.26918 journal article http://dx.doi.org/10.3897/mycokeys.40.26918 1314-4049-40-53 Agaricus (Pseudochitonia) section Cymbiformes M.Q. He & R.L. Zhao sect. nov. Type species. Agaricus angusticystidiatus M.Q. He, Desjardin., K.D. Hyde & R.L. Zhao Etymology. In reference to the cymbiform basidiospores. Original description. KOH reaction negative, Schaeffer's reaction negative on dry specimens. No discolouration on touching, but discolouration reddish-brown on cutting. Annulus membranous. Smell strong iodoform. Basidiospores cymbiform and cheilocystidia narrow with variable shapes.