Russulaceae in American Samoa: new species and further support for an Australasian origin for Samoan ectomycorrhizal fungi

Kropp, Bradley R.

doi:10.3852/15-171

Cited by 9 publications

(2 citation statements)

References 26 publications

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“…Similarly some published data may suggest the same mechanism in ectomycorrhizal fungi between the islands in the South Pacific and other landmasses. For instance, in Lactifluus , some samples from American Samoa are found as conspecific with a Papua New Guinean environmental sample [ 72 ]. Wang et al [ 25 ] showed that in the Lactifluus leoninus lineage, southern China-Thai L .…”

Section: Discussionmentioning

confidence: 99%

Phylogeny, biogeography and taxonomic re-assessment of Multifurca (Russulaceae, Russulales) using three-locus data

Wang¹,

Halling²,

Hofstetter³

et al. 2018

PLoS ONE

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Multifurca is a small genus newly established to accommodate lactarioid and russuloid species with some characters reminiscent of corticoid members of Russulaceae. It shows an amphi-pacific distribution with strong preference for the tropical zone of the Northern Hemisphere and thus has particular significance for biogeographical study. Using worldwide samples and three loci (ITS, 28S rDNA and rpb2), we demonstrated that Multifurca is split into two highly supported major clades that are here recognized at the subgeneric level: subg. Furcata subg. nov. exclusively includes lactarioid species, while subg. Multifurca includes species with a russuloid habit. Using phylogenetic species recognition and comparison of genetic distances we recognize five new and six previously described species, almost double the known number of species before this study. Molecular dating using a Bayesian method suggested that Multifurca originated in early Paleocene and diversified in the Eocene. The most recent interspecific divergences occurred both in Asia and America, roughly at the same time around the Pliocene. Ancestral area reconstruction and comparisons of genetic distances and morphology suggested an early divergence within Australasia or tropical Asia. From the early Miocene to Pliocene, multiple dispersals/migrations to Australasia and North America by island hopping or land bridge likely happened. Vicariance at the late Tertiary might be the most likely mechanism accounting for the eastern Asia—southeastern North America and Australasia—tropical Asia disjunct distributions. The shared polymorphisms in the ITS alignment, numerous degenerated base pairs in the rpb2 sequences and weak conflict between the ITS and LSU genealogies of M. subg. Furcata suggest recent speciation. Host specificity of Multifurca species or species pairs is relatively low. Host shifts are believed to have aided establishment in new territories during the dispersals and migrations.

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Section: Discussionmentioning

confidence: 99%

Phylogeny, biogeography and taxonomic re-assessment of Multifurca (Russulaceae, Russulales) using three-locus data

Wang¹,

Halling²,

Hofstetter³

et al. 2018

PLoS ONE

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“…The phylogenetic analyses based on ITS showed that R. purpureorosea sp. nov. clusters with its sister species R. pallidirosea (Kropp 2016) forming a distinct clade, while R. fusiformata sp. nov. forms a distinct clade parallel to the clade comprising R. dinghuensis and R. subpallidirosea.…”

Section: Discussionmentioning

confidence: 99%

Species of Russula subgenus Heterophyllidiae (Russulaceae, Basidiomycota) from Dinghushan Biosphere Reserve

Song

2022

EJT

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Two new species of subgenus Heterophyllidiae subsection Cyanoxanthinae, Russula fusiformata Y.Song sp. nov. and R. purpureorosea Y.Song sp. nov., collected from the Dinghushan Biosphere Reserve (DHSBR), are described based on both morphology and a phylogenetic analysis of the internal transcribed spacer (ITS), further increasing Heterophyllidiae species diversity in the area. Differences between the two new species and related taxa are analyzed. The other 17 reported species of Russula subgenus Heterophyllidiae that have been collected from DHSBR during mushroom explorations since 2014 are also summarized. The dominant species and the ecological distribution of all 19 species are briefly discussed, and most species are presented in macrofungal plates.

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Taxonomic and phylogenetic evidence reveal two new Russula species (Russulaceae, Russulales) from northern Thailand

Paloi,

Kumla,

Karunarathna

et al. 2023

Mycol Progress

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Russula is the most diverse genus within the family Russulaceae and has an ectomycorrhizal association with many host trees. During the monsoon season of 2022, ve Russula specimens were collected in northern Thailand. After morphological and molecular analyses, the ve specimens were determined to belong to Russula subgenus Heterophyllidia. A single specimen belonged to R. bellissima. Four other collected specimens were distinct from all other known species. We have identi ed these specimens as two new species, namely R. pseudomodesta and R. sribuabanensis. Russula pseudomodesta belongs to the subsection Modestinae, while R. sribuabanensis belongs to the subsection Virescentinae. The phylogenetic placement of two new species within Russula has been con rmed based on sequences of the nuclear internal transcribed spacer (nrITS) region and a large subunit (nrLSU) of the nuclear ribosomal RNA (nrRNA). Comprehensive morphological descriptions, eld photographs, and comparisons of two new species with other morphologically and phylogenetically closely related species have been provided.

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Russulaceae in American Samoa: new species and further support for an Australasian origin for Samoan ectomycorrhizal fungi

Cited by 9 publications

References 26 publications

Phylogeny, biogeography and taxonomic re-assessment of Multifurca (Russulaceae, Russulales) using three-locus data

Phylogeny, biogeography and taxonomic re-assessment of Multifurca (Russulaceae, Russulales) using three-locus data

Species of Russula subgenus Heterophyllidiae (Russulaceae, Basidiomycota) from Dinghushan Biosphere Reserve

Taxonomic and phylogenetic evidence reveal two new Russula species (Russulaceae, Russulales) from northern Thailand

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