Abstract
Dry dipterocarp forests are among the most common habitat types in Thailand. Russulaceae are known as common ectomycorrhizal symbionts of Dipterocarpaceae trees in this type of habitat. The present study aims to identify collections of Russula subsection Amoeninae Buyck from dry dipterocarp forests in Thailand. A multi-locus phylogenetic analysis placed Thai Amoeninae collections in two novel lineages, and they are described here as R. bellissima sp. nov. and R. luteonana sp. nov. The closest identified relatives of both species were sequestrate species suggesting that they may belong to drought-adapted lineages. An analysis of publicly available ITS sequences in R. subsect. Amoeninae did not confirm evidence of any of the new species occurring in other Asian regions, indicating that dry dipterocarp forests might harbor a novel community of ectomycorrhizal fungi. Macromorphological characters are variable and are not totally reliable for distinguishing the new species from other previously described Asian Amoeninae species. Both new species are defined by a combination of differentiated micromorphological characteristics in spore ornamentation, hymenial cystidia and hyphal terminations in the pileipellis. The new Amoeninae species may correspond to some Russula species collected for consumption in Thailand, and the detailed description of the new species can be used for better identification of edible species and food safety in the region.
Highlights
The diversity of Russula in Thailand is estimated to be high and well represented in broadleaf forests dominated by Dipterocarpaceae or Fagaceae trees[3,4]
Multi-locus trees generated from Maximum Likelihood (ML) and Bayesian Inference (BI) analyses showed similar topologies without any supported topological conflict
Acharya is placed as sister to them with bootstrap support of 77
Summary
The diversity of Russula in Thailand is estimated to be high and well represented in broadleaf forests dominated by Dipterocarpaceae or Fagaceae trees[3,4]. Local mushroom hunters are accustomed to recognizing edible russulas that represent morphological complexes and their identifications to species are unprecise These field identifications rely on incomplete macromorphological descriptions and even local fungal inventories regularly apply names of American, European or Japanese origin for Thai s pecies[5]. Forests dominated by members of the family Dipterocarpaceae are one of the most common and important ecosystems in tropical regions of Asia. They are distributed throughout the Southeast Asian realm, e.g. Malesia, the Mainland Southeast Asia, Indochina Peninsula, South Asia, Sri Lanka and Seychelles Islands[13]. This study aims to estimate the diversity of R. subsection Amoeninae in dry dipterocarp forests of north and northeast Thailand based on recently collected materials. We will specify whether species of Amoeninae found in Thailand match any of the previously described members of the lineage or whether they represent new species
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
