Aureoboletus pseudorussellii sp. nov., A Newly Discovered Species in Genus Aureoboletus of Zhejiang Province, China.

Abstract

A morphological and phylogenetic analysis has been conducted on a new species, Aureoboletus pseudorussellii, belonging to the genus Aureoboletus Pouzar (nrLSU + TEF1-α) and provided a detailed description. It grows on the ground under the mixed forest of Fagaceae and Pinaceae in Zhejiang Province, and is named after its similarity to A. russellii. The distinctive features of this species include a pileus uncracked in maturity, with a subtomentose surface, which darkens to reddish brown to blackish brown when injured. It is also marked by a yellowish white to white short veil at the margin. The stipe is adorned with prominent white to pale reddish brown carinate stripes, and its context ranges from yellowish white to orange, showing no discoloration when bruised. Basidiospores (14-)14.5-20.5(-21) × (7.5-)8-9(-9.5) µm. A detailed description of the novel species and its differences from similar species is provided below.