First record of the sequestrate fungus Neosecotium macrosporum (Agaricales, Lepiotaceae) from Mexico

We describe a novel sequestrate genus and species, Asperosporus subterraneus gen. et sp. nov., found associated with nursery production of ferns in south Florida. This truffle species has a unique combination of morphological characters among described Agaricaceae in that it lacks a stipe or columella, has large, ornamented spores, the fresh sporocarps rapidly stain pink-red when cut or bruised, and they have a rancid smell. Although this fungus does not appear to be a direct plant pathogen, the hyphae of A. subterraneus produce a thick hydrophobic mycelial mat that binds the organic matter and therefore prevents water and fertilizer from being absorbed by plants, consequently causing wilting and chlorosis. Using morphological characteristics and phylogenetic reconstruction based on the internal transcribed spacer (ITS), partial large subunit nuclear ribosomal DNA (LSU), second largest subunit of RNA polymerase II (rpb2) and translation elongation factor 1-alpha (tef1) regions, we describe this taxon as a new genus and species in Agaricaceae.

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“…2015 ). The sequestrate fungus Neosecotium macrosporum ( Agaricaceae ) also has ornamented spores and a powdery gleba ( Lizárraga et al . 2012 ).…”

Section: Discussionmentioning

confidence: 99%

Asperosporus subterraneus, a new genus and species of sequestrate Agaricaceae found in Florida nursery production

Karlsen‐Ayala

Gazis

Smith

2021

Fungal Systematics and Evolution

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Notes, outline and divergence times of Basidiomycota

et al. 2019

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The Basidiomycota constitutes a major phylum of the kingdom Fungi and is second in species numbers to the Ascomycota. The present work provides an overview of all validly published, currently used basidiomycete genera to date in a single document. An outline of all genera of Basidiomycota is provided, which includes 1928 currently used genera names, with 1263 synonyms, which are distributed in 241 families, 68 orders, 18 classes and four subphyla. We provide brief notes for each accepted genus including information on classification, number of accepted species, type species, life mode, habitat, distribution, and sequence information. Furthermore, three phylogenetic analyses with combined LSU, SSU, 5.8s, rpb1, rpb2, and ef1 datasets for the subphyla Agaricomycotina, Pucciniomycotina and Ustilaginomycotina are conducted, respectively. Divergence time estimates are provided to the family level with 632 species from 62 orders, 168 families and 605 genera. Our study indicates that the divergence times of the subphyla in Basidiomycota are 406–430 Mya, classes are 211–383 Mya, and orders are 99–323 Mya, which are largely consistent with previous studies. In this study, all phylogenetically supported families were dated, with the families of Agaricomycotina diverging from 27–178 Mya, Pucciniomycotina from 85–222 Mya, and Ustilaginomycotina from 79–177 Mya. Divergence times as additional criterion in ranking provide additional evidence to resolve taxonomic problems in the Basidiomycota taxonomic system, and also provide a better understanding of their phylogeny and evolution.

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First record of the sequestrate fungus Neosecotium macrosporum (Agaricales, Lepiotaceae) from Mexico

Cited by 2 publications

References 7 publications

Asperosporus subterraneus, a new genus and species of sequestrate Agaricaceae found in Florida nursery production

Asperosporus subterraneus, a new genus and species of sequestrate Agaricaceae found in Florida nursery production

Notes, outline and divergence times of Basidiomycota

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