Public Description of Typhrasa Örstadius & E. Larss.

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Name: Typhrasa Örstadius & E. Larss.
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Description status: Unreviewed

Taxonomic Classification:

Domain: Eukarya
Kingdom: Fungi
Phylum: Basidiomycota
Class: Agaricomycetes
Order: Agaricales
Family: Psathyrellaceae


General Description:

The genus Typhrasa Örstadius & E. Larss. was established in 2015. It is characterised by a hygrophanous cap, crowded gills with white edge, small-to-medium-sized spores, large hymenial cystidia with intracellular oily drops or globules and a hymeniderm or paraderm pileipellis (Örstadius et al. 2015). The genus includes two species, T. gos- sypina (Bull.) Örstadius & E. Larss. and T. nanispora Örstadius, Hauskn. & E. Larss., the former being previously reported occasionally from some countries in Europe, North America and Asia within the genus Psathyrella (Fr.) Quél (Smith 1972; Kits van Waveren 1985; Knudsen and Vesterholt 2012; Örstadius et al. 2015). In addi- tion, Psathyrella delineata (Peck) A.H. Sm., P. canadensis A.H. Sm. and P. subtenacipes A.H. Sm. are also reported to have oily drops in their cystidia (Smith 1972; Kits van Waveren 1985) and seems to be a candidate for Typhrasa. However, P. delineata and P. canadensis were combined into T. gossypina, based on the morphology (Örstadius et al. 2015). During investigations in subtropical China during 2018–2020, Typhrasa was recorded for the first time in China with two unrecorded species, which were fre- quently collected. Based on morphological characters and phylogenetic analyses, they are described as new species in this paper.

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Description author: Excited delirium [EXD]▼ (Request Authorship Credit)
Description editor: Dušan