Armillaria mexicana, a newly described species from Mexico.

Abstract:

:Armillaria mexicana (Agaricales, Physalacriaceae) is described as a new species based on morphology, DNA sequence data, and phylogenetic analyses. It clearly differs from previously reported Armillaria species in North, Central, and South America. It is characterized by the absence of fibulae in the basidioma, abundant cheilocystidia, and ellipsoidal, hyaline basidiospores that are apparently smooth under light microscope, but slightly to moderately rugulose under scanning electron microscope. It is differentiated from other Armillaria species by macromorphological characters, including annulus structure, pileus and stipe coloration, and other structures. DNA sequence data (nuc rDNA internal transcribed spacers [ITS1-5.8S-ITS2 = ITS], 28S D-domain, 3' end of 28S intergenic spacer 1, and translation elongation factor 1-α [TEF1]) show that A. mexicana sequences are quite distinct from sequences of analogous Armillaria species in GenBank. In addition, sequences of ITS of the A. mexicana ex-type culture reveal an ITS1 of 1299 bp and an ITS2 of 582 bp, the longest ITS regions reported thus far in fungi. Phylogenetic analysis based on TEF1 sequences place A. mexicana in a well-separated, monophyletic clade basal to the polyphyletic A. mellea complex.

journal_name

Mycologia

journal_title

Mycologia

authors

Elías-Román RD,Medel-Ortiz R,Alvarado-Rosales D,Hanna JW,Ross-Davis AL,Kim MS,Klopfenstein NB

doi

10.1080/00275514.2017.1419031

subject

Has Abstract

pub_date

2018-03-01 00:00:00

pages

347-360

issue

2

eissn

0027-5514

issn

1557-2536

journal_volume

110

pub_type

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