The genus Hebeloma in the Rocky Mountain Alpine Zone

By

Cripps, Cathy Lynn, 1948-
Eberhardt, Ursula
Schuetz, Nicole
Beker, Henry
Evenson, Vera
Horak, Egon

Type

Article

Date of Publication

2019

Original Publication

NeoBiota : advancing research on alien species and biological invasions

Volume

46

Pages

Jan-54

Subjects

A.H. Smith , Arctic-alpine , ectomycorrhizal , fungal biodiversity , Hymenogastraceae , ITS , systematics

Contributed by

Pensoft Publishers

Language

English

Published by

Sophia, Bulgaria Pensoft Publishers

Identifiers

DOI: https://doi.org/10.3897/mycokeys.46.32823

 

Abstract

Numerous taxa ofHebelomahave been reported in association withSalix,Dryas, andBetulain arctic-alpine habitats. However, species are notoriously difficult to delineate because morphological features overlap, and previously there was little reliable molecular data available. Recent progress in ITS-sequencing within the genus, coupled with an extensive database of parametrically described collections, now allows comparisons between species and their distributions. Here we report 16 species ofHebelomafrom the Rocky Mountain alpine zone from some of the lowest latitudes (latitude 36°–45°N) and highest elevations (3000–4000 m) for arctic-alpine fungi in the northern hemisphere. Twelve of these species have been reported from arctic-alpine habitats in Europe and Greenland and are now molecularly confirmed from the Middle and Southern Rockies, greatly expanding their distribution. These are:Hebelomaalpinum,H.aurantioumbrinum,H.dunense,H.hiemale,H.marginatulum,H.mesophaeum,H.nigellum,H.oreophilum,H.subconcolor,H.spetsbergense,H.vaccinum, andH.velutipes. Hebelomahygrophilumis known from subalpine habitats in Europe, but was never recorded in arctic-alpine ecology. Three species recorded from the Rockies, but as yet not reported from Europe, areH.alpinicola,H.avellaneum, andH.excedens. The last two have never previously been reported from an arctic-alpine habitat. For all three of these species, the holotypes have been studied morphologically and molecularly, and have been incorporated into the analysis.