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. 2023 Oct 18;18(10):e0290894.
doi: 10.1371/journal.pone.0290894. eCollection 2023.

A new species of Inosperma, and first record of I. afromelliolens (Inocybaceae, Fungi) from West Africa

Hyppolite L Aïgnon  1 , Yu-Guang Fan  2 , André De Kesel  3 , Mohammad Bahram  4   5 , Martin Ryberg  6 , Nourou S Yorou  1
Affiliations

A new species of Inosperma, and first record of I. afromelliolens (Inocybaceae, Fungi) from West Africa

Hyppolite L Aïgnon et al. PLoS One. .

Abstract

Here, we present the newly identified Inosperma macrocarpa and the first record of I. afromelliolens from West Africa. Inosperma macrocarpa is nested in an Old World Tropical clade, based on a molecular phylogeny inferred from the sequences of ITS, LSU, RPB2, and TEF1. Complete descriptions and illustrations, including photographs and line drawings, of the new species are presented. Morphological and molecular analyses based on collections from Benin confirmed the presence of I. afromelliolens in West Africa. Toxicity analysis showed that neither species contained muscarine, which further supports the hypothesis that the ability to produce muscarine is a derived trait of Inosperma.

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Conflict of interest statement

The authors have declared that no competing interests exist.

Figures

Fig 1
Fig 1. ML tree of ITS, LSU, RPB2, and TEF1 sequences showing the placement of Inosperma macrocarpa.
Values above or below branches indicate bootstrap proportions SH-aLRT support ≥ 80% / ultrafast bootstrap support ≥ 95%. Origin of species is given after the name of each taxon. The new species and the new records are in red.
Fig 2
Fig 2. A–F. Inosperma afromelliolens (HLA0754), microscopical characters in KOH and Congo Red.
A. Basidiospores, B. Basidia, C. Cheilocystidia, D. Caulocystidia, E. Pileipellis F. Stipitipellis. Scale bars: 5 μm (A); 10 μm (B–F).
Fig 3
Fig 3
A–F. Inosperma afromelliolens (HLA0754). A. Basidiospores B. Basidia, C. Cheilocystidia, D. Caulocystidia, E. Pileipellis F. Stipitipellis. Scale bars: 5 μm (A-B); 10 μm (C–F).
Fig 4
Fig 4
A–H. Inosperma macrocarpa (HLA0791), microscopical characters in KOH and Congo Red. A. Basidiospores B. Basidia, C. Cheilocystidia, D. Caulocystidia, E. Pileipellis F. Stipitipellis, G. Pileipellis hyphae H. Stipitipellis hyphae. Scale bars: A–B = 5 μm, C–D = 10 μm, E–H = 20 μm.
Fig 5
Fig 5
A–F. Inosperma macrocarpa (HLA0791). A. Basidiospores B. Basidia, C. Cheilocystidia, D. Caulocystidia, E. Pileipellis F. Stipitipellis. Scale bars: A–B = 5 μm, C–F = 10 μm.
Fig 6
Fig 6
Macromorphology of: A–E, G–H. Inosperma macrocarpa (A–E = HLA0930, G = HLA0791, H = HLA0920) and F. Inosperma afromelliolens (HLA0407). Scale bar: 2.5 cm (A–F) and 1 cm (G–H).
See this image and copyright information in PMC

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