Cryptolepiota, a new sequestrate genus in the Agaricaceae with evidence for adaptive radiation in western North America

Bradley R. Kropp; Steve Albee-Scott; Michael Castellano; James M. Trappe

Treesearch

Cryptolepiota, a new sequestrate genus in the Agaricaceae with evidence for adaptive radiation in western North America

Formally Refereed

Authors:

Bradley R. Kropp, Steve Albee-Scott, Michael Castellano, James M. Trappe

Year:

2012

Type:

Scientific Journal

Station:

Northern Research Station

Source:

Mycologia. 104(1): 164-174

Download (PDF 2.36 MB)

Download (PDF 2.36 MB): https://research.fs.usda.gov/download/treesearch/40869.pdf

Abstract

Phylogenetic analyses based on nLSU and ITS sequence data indicate that the sequestrate genus Gigasperma is polyphyletic. Gigasperma cryptica, which is known only from New Zealand, has affinities with the Cortinariaceae whereas G. americanum and two additional undescribed taxa from western North America are derived from Lepiota within the Agaricaceae. The three North American taxa appear to be recently evolved and are closely related. They occur in similar environments and form a well-supported clade indicating that adaptive radiation has occurred within this group of fungi. An independent genus with sequestrate fructifications, Cryptolepiota is proposed to accommodate the three species in this clade. Cryptolepiota microspora and C. mengei are described as new, and G. americanum is transferred to Cryptolepiota.

Keywords

Basidiomycota, Cortinariaceae, fungi, Gigasperma, phylogenetics

Citation

Kropp, Bradley R.; Albee-Scott, Steve; Castellano, Michael A.; Trappe, James M. 2012. Cryptolepiota, a new sequestrate genus in the Agaricaceae with evidence for adaptive radiation in western North America. Mycologia. 104(1): 164-174.