Three new <i>Melanogaster </i>species (Boletales, Paxillaceae) from1southwestern China based on morphological and molecular evidence

Three newly discovered <i>Melanogaster </i>species, namely <i>M. cyaneus</i>, <i>M. diqingensis</i>, and11<i>M. truncatisporus</i>, are introduced and illustrated based on both morphological and12molecular data from Sichuan and Yunnan provinces in China. Morphologically, <i>M.</i>13<i>cyaneus </i>is characterized by its blue or bluish gleba, light brown to yellowish brown14peridium, and subglobose to globose basidiospores, 6.2–15 × 4.6–9.0 μm. <i>M</i>本文基于中国四川、云南两省的形态学与分子学数据，对三个新发现的黑腹菌属（Melanogaster）物种进行了描述与图解，分别为蓝黑腹菌（M. cyaneus）、迪庆黑腹菌（M. diqingensis）以及截孢黑腹菌（M. truncatisporus）。形态学上，蓝黑腹菌以其蓝色至蓝灰色的产孢组织、浅棕至黄褐色的包被，以及尺寸为6.2–15 × 4.6–9.0 μm的近球形至球形担孢子为典型特征。