Fossil mushrooms from Miocene and Cretaceous ambers and the evolution of Homobasidiomycetes

TitleFossil mushrooms from Miocene and Cretaceous ambers and the evolution of Homobasidiomycetes
Publication TypeJournal Article
Year of Publication1997
AuthorsHibbett DS, Grimaldi D, Donoghue MJ
JournalAmerican Journal of Botany
Volume84
Pagination981-991
ISSN00029122
KeywordsBiological Sciences, Botany & Plant Sciences
Abstract

Two species of fossil mushrooms that are similar to extant Tricholomataceae are described from Cretaceous and Miocene ambers Archaeomarasmius leggetti gen. et sp. nov., from mid-cretaceous amber of New Jersey, resembles the extant genera Marasmius and Marasmiellus Two fruiting bodies of Archaeomarasmius were found. One consists of a complete pileus with stipe, and the other consists of a fragment of a pileus The latter was accidentally exposed, and zxsubsequently was used for molecular systematics studies (attempts to amplify ribosomal DNA were unsuccessful) and electron microscopy. The spores are smooth and broadly elliptic with a distinct hilar appendage. Protomycena electra gen. et sp. nov., which is represented by a single complete fruiting body from Miocene amber of the Dominican Republic, is similar to the extant genus Mycena. Based on comparison to extant Marasmieae and Myceneae, Archaeomarasmius and Protomycena were probably saprophytes of leaf litter or wood debris. The poor

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