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Type: Article
Published: 2020-08-20
Page range: 125–144
Abstract views: 21
PDF downloaded: 1

Rooting Hebelomas: The Japanese ‘Hebeloma radicosum’ is a distinct species, Hebeloma sagarae sp. nov. (Hymenogastraceae, Agaricales)

Staatliches Museum für Naturkunde Stuttgart, Rosenstein 1, 70191 Stuttgart, Germany.
Rue Père de Deken 19, B-1040 Bruxelles, Belgium; Royal Holloway College, University of London, Egham, United Kingdom; Plantentuin Meise, Nieuwelaan 38, B-1860 Meise, Belgium.
Staatliches Museum für Naturkunde Stuttgart, Rosenstein 1, 70191 Stuttgart, Germany.
Faculty of Risk and Crisis Management, Chiba Institute of Science, 3 Shiomi-cho, Choshi, Chiba 288-0025, Japan.
Faculty of Risk and Crisis Management, Chiba Institute of Science, 3 Shiomi-cho, Choshi, Chiba 288-0025, Japan; Department of Biology, Keio University, 4-1-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8521, Japan.
Ammonia fungi Basidiomycota ectomycorrhizal fungi mammal latrines Fungi

Abstract

Hebeloma radicosum, known for its long ‘root’ and membranous ring, has regularly been recorded in Japan and been the subject of many studies revolving around ectomycorrhizal fungi exposed to high levels of nitrogen compounds and tripartite associations between fungi, host trees and mammals, including moles, wood mice and shrews. However, the species recorded in Japan is in fact not H. radicosum but a closely related species, also in Hebeloma section Myxocybe, described here as Hebeloma sagarae. This mushroom is macroscopically very similar to Hebeloma radicosum, also with a long ‘root’ and membranous ring, but distinct molecularly and in its distribution. We also examine other ‘rooting’ Hebeloma species from Japan: H. luchuense and H. radicosoides; both are shown to be members of H. sect. Scabrispora. A fourth ‘rooting’ Hebeloma from Japan is shown to be the same as or a close relative of Hebeloma danicum originally described from Europe.