Lactarius verrucosporus sp. nov. and L. nigricans sp. nov., two new species of Lactarius (Russulaceae) from southern China

GENG-SHEN WANG; YU SONG; JING-WEI LI; SHI-YAO XIA; LI-HONG QIU

doi:10.11646/phytotaxa.364.3.2

Issue: Vol. 364 No. 3: 14 August 2018

Type: Article

Published: 2018-08-14

DOI: 10.11646/phytotaxa.364.3.2

Page range: 227–240

Abstract views: 44

PDF downloaded: 1

Lactarius verrucosporus **sp. nov. and L. nigricans sp. nov., two new species of Lactarius (Russulaceae) from southern China**

GENG-SHEN WANG⁺⁻
YU SONG⁺⁻
JING-WEI LI⁺⁻
SHI-YAO XIA⁺⁻
LI-HONG QIU⁺⁻

State Key Lab of Biocontrol, School of Life Science, Sun Yat-sen University, Guangzhou 510275, China

Fungi Lactarius new taxa phylogeny taxonomy

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Abstract

Two new species of Lactarius from Dinghu Mountain, Guangdong Province in southern China were described based on both morphological characters and phylogenetic analysis of internal transcribed spacer (ITS) sequences. Lactarius verrucosporus sp. nov. is characterized by reddish brown pileus with white and decurved margin, pale cream lamellae, globose to subglobose basidiospores with isolated warts, thin pileipellis composed of globose subterminal cells and inflated terminal elements. Lactarius nigricans sp. nov. is recognized by greyish brown pileus, beige lamellae, amyloid basidiospores with high ridges, subcylindrical to subfusiform caulocystidia, thick pileipellis with long terminal cells. Both molecular and morphological analysis consistently confirm that L. verrucosporus and L. nigricans belong to Lactarius subgenera Russularia and Plinthogalus, respectively, and both species are distinct from all described species of these two subgenera. The morphological differences of these two novel species with their closely related taxa are discussed.

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