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This paper is the second in a series of biodiversity papers on Lactarius subgenus Russularia in tropical forests of Southeast Asia. This study is based on extensive mycological exploration, especially in Northern Thailand, during the past ten years. In this paper we consider some species that are characterized by remarkably small basidiocarps i.e. with an average pileus diameter that is smaller than 20 mm. One of the most common species in Northern Thailand with dwarf basidiocarps is L. gracilis, originally described from Japan. We introduce the new species L. crenulatulus, L. perparvus and L. glabrigracilis with morphological descriptions and illustrations. Molecular evidence based on the ITS sequence analysis supports the classification and novel status of the taxa. All species are associated with trees belonging to the Fagaceae. These are the first reported collections of small basidiocarps of L. subg. Russularia in Southeast Asia. In our paper we compare these new species with small basidiocarp with similar representatives from Europe and other Asian regions.
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... Hierzu unternahm der Erstautor im Auftrag der Universität Gent zusammen mit Studenten der Universität Chiang Rai und ortsansässigen Mykologen mehrere Exkursionen in Gebirgswälder mit hohem Anteil Ektomykorrhiza-bildender Baumarten. Von dieser Forschungsreise wurden in den vergangenen Jahren bereits einige Arten aus der Familie der Russulaceae durch verschiedene Mitglieder des Forschungsteams beschrieben (Wisitrassameewong et al. 2014a, 2014b, 2015, De Crop et al. 2016. In einer großen Veröffentlichung zum Thema "Neue Standards in der Beschreibung von Russula-Arten" wurden drei unbeschriebene Russula Arten von dieser Expedition bereits morphologisch und genetisch dokumentiert (Adamčík et al. 2019). ...
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Russula aurantiopectinata sp. nov. and Russula magica sp. nov., two new species from tropical montane rainforests of northern Thailand, are described based on morphological and molecular genetic data and illustrated. The phylogenetic lineage comprising Russula magica, Russula olivaceohimalayensis, Russula seperina and Russula rhodomarginata is formally described as a new subsection Magicae within the subgenus Russula. Zusammenfassung: Russula aurantiopectinata sp. nov. und Russula magica sp. nov., zwei neue Arten aus tropischen Bergregenwäldern Nordthailands, werden auf Grundlage morphologi-scher und molekulargenetischer Daten beschrieben und illustriert. Russula magica gehört zu-sammen mit Russula olivaceohimalayensis, Russula seperina und Russula rhodomarginata zu einem Verwandtschaftskreis, der als neue Subsektion Magicae innerhalb der Untergattung Russula beschrieben wird.
... The subgenus is dominant in all temperate zones, poorly represented in South America, completely absent or negligible in tropical Africa but with an important distribution in South-East Asia (Wisitrassameewong et al. 2015). 40 species of this subgenus have been described from South-East Asia so far mainly from China, Papua New Guinea, India, Korea, Thailand and Japan (Das et al. 2004, Verbeken et al. 2014, Wisitrassameewong et al. 2014a, 2014b, 2016, Wang 2017a, 2017b, Wang et al. 2018b, Lee et al. 2019). ...
... Several new species have since been described and illustrate that our knowledge of the genus in North America and Asia still has gaps (Nuytinck and Ammirati 2014;Wang et al. 2015b;Wang 2016;Nuytinck et al. 2017). Wisitrassameewong et al. (2014aWisitrassameewong et al. ( , b, 2015Wisitrassameewong et al. ( , 2016 explored the diversity of L. subg. Russularia focusing mainly on Southeast Asia. ...
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Milkcaps form a diverse group of widely consumed ectomycorrhizal fungi. Despite their popularity and ubiquity, large gaps still exist in our knowledge of the milkcap genera. This paper summarizes our current state of knowledge of both Lactarius and Lactifluus. Lacunas in our knowledge are indicated, and an overview of their culinary uses is given.
... Lactarius sublaccarioides is reported from Thailand, from Castanopsis sp. and Lithocarpus sp. dominated forest, but differs by the very distant lamellae, the strong sweet smell, the watery white latex, the ellipsoid to subglobose basidiospores and a trichoderm with transitions to a cutis as a stipitipellis (Wisitrassameewong et al. 2014b). Lactarius kesiyae ectomycorrhizal with Pinus kesiyae, reported from Vietnam, differs by the presence of a watery white latex which turns yellowish, a sticky pileus with slight greenish tinges, the absence of concentric zones and an ixocutis to ixotrichoderm type of pileipellis (Wisitrassameewong et al. 2015). ...
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Lactarius brunneocinnamomeus found in Shorea robusta (‎ Dipterocarpaceae) dominated forest, is proposed as a new species. The species belongs to L. subg. Russularia, sect. Russularia. It is easily recognized by a light brown to orange brown pileus with concentric zones, milky white latex and a palisade to trichopalisade as a pileipellis. Its phylogenetic position inside the genus is based on the nuclear internal transcribed spacer (ITS) region. A complete description, drawings and photographs of the new species are provided. The new species is compared with morphologically similar and phylogenetically allied species .
... The Korean specimens labeled as L. gracilis were identified as L. qinlingensis. However, L. gracilis may indeed be present in Korea because it was originally described in Japan and has a wide distribution in Asia (Wang 2007;Wisitrassameewong et al. 2014b). Further study is needed to determine whether the other four Asian species (L. ...
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