Amanita pseudorufobrunnescens, a new species of Amanita section Amidella from Indian Himalaya

Semwal, K. C.; Das, Kanad; Bhatt, R. P.; Mehmood, Tahir; Bhatt, Vinod K.

doi:10.1007/s12225-020-9874-6

Cited by 3 publications

(5 citation statements)

References 12 publications

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“…Unfortunately, the sequences are the only support for these subclades. Even with the very detailed descriptions available (Deng et al 2016;Cui et al 2018;Semwal et al 2020;Liu et al 2023;Tulloss and Yang 2024), our attempts to derive morphology-based simplesiomorphies were unsuccessful. On the other hand, the available alignments suggest efficient means to retrieve enough sequence information from type specimens to resolve the hitherto unclear identification of taxa such as Amanita avellaneosquamosa (Table 1; Online Resource 11).…”

Section: Discussionmentioning

confidence: 97%

Charting Taxa inAmanitaSectionAmidella(Basidiomycota:Amanitaceae)

Oliveira,

Arraiano-Castilho

2024

Preprint

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Species determination in the Amidella clade is notoriously difficult, because of the relative dearth of field characters and the rather common occurrence of homoplasies. This results in a substantial number of misnamed and unnamed collections, a misapprehension of the geographic range of known species, and a gross underestimation of the number of species it contains. To assess the diversity that should be considered as part of Amidella, DNA sequences available for this group were retrieved in public nucleotide databases, using a combination of approaches to achieve a comprehensive representation. Phylogenetic analysis based on the aligned ITS sequences, consistently with the results from other molecular markers (nLSU, RPB2, TEF1, BTUB), suggests five major clades: one containing the type species Amanita volvata, another for Amanita ponderosa and allies, a third one (roughly half of all species) with Amanita lepiotoides, and two others without valid species yet. Consensus rRNA folding structures were obtained for these clades, maintaining their congruence and separation from neighbouring congeneric clades. At species level, around 78 clades were delimited, of which only up to 17 can be assigned a valid name, with a few more corresponding to provisional taxa listed in the amanitaceae.org website. Two further species without assigned sequences might correspond to the proposed clades. The current evidence suggests a rather narrow geographic range for most of these clades. This study provides a phylogeny-arranged outlook of the worldwide distribution of Amidella species, and a framework for designing clade-specific molecular markers to assist in identification.

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Section: Discussionmentioning

confidence: 97%

Charting Taxa inAmanitaSectionAmidella(Basidiomycota:Amanitaceae)

Oliveira,

Arraiano-Castilho

2024

Preprint

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“…Gilbert. Among these, A. pseudorufobrunnescens , originally described from India, is easily segregated by its white to milky‐white pileus that turns brownish orange to greyish orange with age, stipe densely covered with fibrillose to floccose squamules, elongated basidiospores (8.0–11.0 × 5.2–5.5 μm with higher Qm = 1.75), and its association with Quercus oblongata in temperate broad‐leaved forests (Semwal et al 2020). Amanita rufobrunnescens , a species originally described from China, differs from A. parvirufobrunnescens by its white to brownish basidioma, elongated basidiospores with higher Qm 1.78 and found under Castanopsis fissa in subtropical forests with broad‐leaved trees (Deng et al 2016).…”

Section: Discussionmentioning

confidence: 99%

“…For this study, a dataset of 43 nrLSU sequences including the sequence of our novel taxon were analysed. These nrLSU sequences were selected based on BLAST search results (Altschul et al 1997) and availability of sequences of Amanita in public databases like GenBank (Clark et al 2016) and relevant literature (Cui et al 2018, Semwal et al 2020). The nrLSU dataset was aligned with Mafft ver.…”

Section: Phylogenetic Analysismentioning

confidence: 99%

“…The genus Amanita Pers. ( Amanitaceae ) have recently earned considerable attention, with new records and novel species being described from India (Bhatt et al 2003, Semwal et al 2005, 2020, Das et al 2017, Tibpromma et al 2017, Hosen et al 2018, Mehmood et al 2018a, b2018b, c2018c, 2019, Phookamsak et al 2019). To date, the genus Amanita is comprised of 613 validly published species from all over the world (Tulloss and Yang 2021) and about 66 species have been reported from India (Das et al 2017, Hosen et al 2018, Mehmood et al 2018a, b2018b, c2018c, d2018d, Kumar et al 2021).…”

Section: Introductionmentioning

confidence: 99%

“…So far, only three species of sect. Amidella , namely Amanita avellaneosquamosa (S.Imai) S.Imai, A. clarisquamosa (S.Imai) S.Imai and A. pseudorufobrunnescens Semwal et al have been reported from India (Bhatt et al 2003, Semwal et al 2005, 2020, Mehmood et al 2019).…”

Section: Introductionmentioning

confidence: 99%

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Amanita parvirufobrunnescens (Agaricales: Amanitaceae), a new species in A. sect. Amidella from India

Kumar

Sharma

Verma

et al. 2021

Nordic Journal of Botany

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Amanita parvirufobrunnescens, a new species of Amanita sect. Amidella is described here based on morphological and molecular evidence. This new species is recognized by its small sized basidiomata, snow-white pileus covered by light grey to grey to brownish volval remnants on the pileus, context turning brownish to reddish-brown on cutting or bruising, ellipsoid to elongated basidiospores measuring 10.0-17.0 × 6.0-10.0 μm and its occurrence in coniferous forests dominated by Abies pindrow and Picea smithiana. Morphological characters and molecular phylogenetic analyses based on the large subunit of nuclear ribosomal DNA (nrLSU) data support that the present species differs from other members of A. sect. Amidella. Description, discussion, drawings, photographs and a phylogenetic framework for the new species are given.

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