Abstract
ABSTRACT Psathyrella atlantica is described based on material collected in an Atlantic Forest fragment in the state of Pernambuco, Northeast Brazil. It is characterized by slender, whitish and caespitose basidiomata; pileus with orange, small and floccose-squamulose veil remnants; presence of a persistent but fragile-membranous annulus; basidiospores 5-7 × 3-4 µm; and inconspicuous germ pore. A full description plus illustrations and comments on morphological and phylogenetic data are provided.
Highlights
Psathyrella (Psathyrellaceae, Agaricales) is a large genus of dark-spored mushrooms, with 500 (Vašutová et al 2008) to 600 (Kirk et al 2008) known species
The Maximum likelihood (ML) and Bayesian analyses (BA) analyses produced similar topologies, and the BA tree was chosen to represent the phylogenetic placement of P. atlantica (Fig. 1)
The analyses revealed that P. atlantica has strong support in the phylogeny, clustering close to P. leucotephra
Summary
Psathyrella (Psathyrellaceae, Agaricales) is a large genus of dark-spored mushrooms, with 500 (Vašutová et al 2008) to 600 (Kirk et al 2008) known species. Molecular phylogenetic methods are being used in the studies of Psathyrella and satellite genera, based on nu-rDNA sequences (Larsson & Örstadius 2008; Padamsee et al 2008; Vašutová et al 2008; Nagy et al 2013). This has resulted in considerable advances in the understanding of the relationships within these fungi and revealed that the current infrageneric classification does not reflect the phylogeny of Psathyrella (Vašutová et al 2008). Only six among 116 samples analyzed in this study were collected from the tropics
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