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Issue: Vol. 642 No. 2: 28 Mar. 2024
Type: Article
Published: 2024-03-28
DOI: 10.11646/phytotaxa.642.2.6
Page range: 182-190
Abstract views: 99
PDF downloaded: 5

Coltricia aridicola sp. nov. derived from the Coltricia perennis complex (Hymenochaetaceae) confirmed by molecular phylogeny

State Key Laboratory of Efficient Production of Forest Resources; School of Ecology and Nature Conservation; Beijing Forestry University; Beijing 100083; China; Key Laboratory of Forest and Grassland Fire Risk Prevention; Ministry of Emergency Management; China Fire and Rescue Institute; Beijing 102202; China
Experimental Centre of Forestry in North China; Warm Temperate Zone Forestry Jiulong Mountain National Permanent Scientific Research Base; Chinese Academy of Forestry; Beijing 102300; China
Biology Centre; Czech Academy of Sciences; Institute of Plant Mol. Biol.; Branišovská 31; CZ-370 05 České Budějovice; Czech Republic
Yunnan Key Laboratory of Gastrodia and Fungi Symbiotic Biology; Zhaotong University; Zhaotong 657000; Yunnan China
State Key Laboratory of Efficient Production of Forest Resources; School of Ecology and Nature Conservation; Beijing Forestry University; Beijing 100083; China
Fungi Phylogenetic analysis polypore taxonomy Coltricia perennis Coltricia confluens Coltricia focicola

Abstract

A new polypore in the family Hymenochaetaceae, Coltricia aridicola, is described and illustrated from China and the USA based on morphology and phylogenetic analysis. The species was found in northeast and southwest China and western USA, growing on soil in gymnosperm forests. It is characterized by an annual growth habit, centrally stipitate basidiocarps with regular pilei, pileal surface distinctly zonate, medium-sized pores as 3–4 per mm, a monomitic hyphal system, generative hyphae with simple septa, the presence of antler-like hyphal elements at the pileal surface, contextual hyphae almost twice the diameter of the tramal hyphae, thick-walled, yellowish, cyanophilous, oblong-ellipsoid basidiospores measuring 7–7.8 × 4.5–4.8 µm, and growth in dry environments such as burnt soil or open areas of ground in gymnosperm forests. The phylogenetic analysis based on ITS sequences showed that samples of C. aridicola nested in Coltricia, forming a monophyletic lineage with strong support (100 % BS, 100 % BP, 1.00 BPP). The differences between C. aridicola and its similar and related species in the genus are discussed.

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