TY -JOUR AU -Miyu Sugimoto AU -Yoshihito Ohmura TI -Pyrgillus mammosus (Pyrenulaceae, lichenized Ascomycota), a new species from Taiwan PY -2022 DA -2022-05-02 JO -Taiwania VL -67 IS -2 SP -267 EP -270 UR -https://taiwania.ntu.edu.tw/abstract/1838 AB -Pyrgillus mammosus, a new species from Xitou, Taiwan is described and illustrated. It is similar to P. tibellii and P. rufus but differs in its potassium hydroxide reaction of the thallus (K+ red) as a main distinguishing feature, additional chemical compounds detected by thin layer chromatography, and larger conical to hemispherical ascomata. Morphological and chemical differences among the closely similar taxa are discussed. DO -10.6165/tai.2022.67.267