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Article
Published: 2020-12-04

Heimioporus subcostatus, a new Boletaceae species from northern and northeastern Thailand

1. Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand 2. Research Center of Microbial Diversity and Sustainable Utilization, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand
1.Botanic Garden Meise, Nieuwelaan 38, Meise, Belgium 2.Fédération Wallonie-Bruxelles, Service général de l’Enseignement universitaire et de la Recherche scientifique, Rue A. Lavallée 1, Bruxelles, Belgium 3. Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai, Thailand 4. School of Science, Mae Fah Luang University, Chiang Rai, Thailand
1. Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand 2. Research Center of Microbial Diversity and Sustainable Utilization, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand 3. Academy of Science, The Royal Society of Thailand, Bangkok 10300, Thailand
atp6 Diversity Multigene phylogeny Taxonomy Xerocomoideae Fungi

Abstract

A novel bolete species, Heimioporus subcostatus, is described from northern and northeastern Thailand. It can be distinguished from the other Heimioporus species by its reddish brown to brownish red basidiomata when young becoming dull red to pale red at maturity, with raised and prominent reticulation on stipe, yellow pores, basidiospores with incomplete reticulation, and occurrence in dipterocarp forest dominated by Dipterocarpus spp. and Shorea spp. In a phylogenetic tree based on a three-gene (atp6, tef1, rpb2) data set, the new species formed a clade sister to H. sinensis within the supported Heimioporus clade in the Xerocomoideae (Boletaceae). Macroscopic and microscopic descriptions, as well as illustrations of the new species are presented.