title: New sequestrate fungi from Guyana: Jimtrappea guyanensis gen. sp. nov., Castellanea pakaraimophila gen. sp. nov., and Costatisporus cyanescens gen. sp. nov. (Boletaceae, Boletales).
abstract: Jimtrappea guyanensis gen. sp. nov., Castellanea pakaraimophila gen. sp. nov., and Costatisporus cyanescens gen. sp. nov. are described as new to science. These sequestrate, hypogeous fungi were collected in Guyana under closed canopy tropical forests in association with ectomycorrhizal (ECM) host tree genera Dicymbe (Fabaceae subfam. Caesalpinioideae), Aldina (Fabaceae subfam. Papilionoideae), and Pakaraimaea (Dipterocarpaceae). Molecular data place these fungi in Boletaceae (Boletales, Agaricomycetes, Basidiomycota) and inform their relationships to other known epigeous and sequestrate taxa within that family. Macro- and micromorphological characters, habitat, and multi-locus DNA sequence data are provided for each new taxon. Unique morphological features and a molecular phylogenetic analysis of 185 taxa across the order Boletales justify the recognition of the three new genera.
authors.affiliation: Department of Plant Pathology, University of Florida, Gainesville, FL 32611, USA.
authors.forename: Matthew E
authors.initials: ME
authors.lastname: Smith
authors.affiliation: Department of Biological Sciences, Humboldt State University, Arcata, CA 95521, USA;
authors.forename: Kevin R
authors.initials: KR
authors.lastname: Amses
authors.affiliation: Department of Integrative Studies, Warren Wilson College, Asheville, NC 28815, USA.
authors.forename: Todd F
authors.initials: TF
authors.lastname: Elliott
authors.affiliation: Department of Plant Pathology, University of Florida, Gainesville, FL 32611, USA.
authors.forename: Keisuke
authors.initials: K
authors.lastname: Obase
authors.affiliation: Department of Botany & Plant Pathology, Purdue University, West Lafayette, IN 47907, USA.
authors.forename: M Catherine
authors.initials: MC
authors.lastname: Aime
authors.affiliation: Department of Biological Sciences, Humboldt State University, Arcata, CA 95521, USA;
authors.forename: Terry W
authors.initials: TW
authors.lastname: Henkel
keywords: Boletineae; Caesalpinioideae; Dipterocarpaceae; Guiana Shield; ectomycorrhizal fungi; gasteroid fungi