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. 2021 Jan 28:77:97-116.
doi: 10.3897/mycokeys.77.60084. eCollection 2021.

Three new species of Inosperma (Agaricales, Inocybaceae) from Tropical Africa

Hyppolite L Aïgnon  1 , Sana Jabeen  2 , Arooj Naseer  3 , Nourou S Yorou  1 , Martin Ryberg  4
Affiliations

Three new species of Inosperma (Agaricales, Inocybaceae) from Tropical Africa

Hyppolite L Aïgnon et al. MycoKeys. .

Abstract

Here, we describe three new species of Inosperma from Tropical Africa: Inosperma africanum, I. bulbomarginatum and I. flavobrunneum. Morphological and molecular data show that these species have not been described before, hence need to be described as new. The phylogenetic placements of these species were inferred, based on molecular evidence from sequences of 28S and RPB2. Additional analysis using ITS dataset shows interspecific variation between each species. Phylogenetic analyses resolve I. flavobrunneum in Old World Tropical clade 1 with weak support, I. bulbomarginatum is sister of Old World Tropical clade 1 and I. africanum is indicated as sister to the rest of Inosperma. Complete description and illustrations, including photographs and line drawings, are presented for each species. A new combination of Inocybe shawarensis into Inosperma is also proposed.

Keywords: Ectomycorrhizal; West Africa; molecular systematics; phylogeny; taxonomy.

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Figures

Figure 1.
Figure 1.
ML tree of 28S and RPB2 sequences showing the placement of Inosperma africanum, I. bulbomarginatum and I. flavobrunneum. Values above or below branches indicate bootstrap proportions SH-aLRT support ≥ 80% / ultrafast bootstrap support ≥ 95% / Bayesian posterior probabilities > 0.95 as shown. Origin of species is given after the name of each taxon. The new species are in red.
Figure 2.
Figure 2.
Macromorphology of: AInosperma africanum (HLA0383) BInosperma bulbomarginatum (MR00357) C, DInosperma flavobrunneum (HLA0367). Scale bar: 1 cm.
Figure 3.
Figure 3.
Microscopic structures of Inosperma africanum (HLA0383) A basidiospores B basidia C cheilocystidia D caulocystidia E pileipellis F stipitipellis. Scale bars: 3 μm (A); 5 μm (B); 10 μm (C–F).
Figure 4.
Figure 4.
Microscopic structures of Inosperma bulbomarginatum (MR00357) A basidiospores B basidia C cheilocystidia D caulocystidia E pileipellis F stipitipellis. Scale bars: 3 μm (A); 5 μm (B); 10 μm (C–F).
Figure 5.
Figure 5.
Microscopic structures of Inosperma flavobrunneum (HLA0367) A basidiospores B basidia C cheilocystidia D caulocystidia E pileipellis and F stipitipellis. Scale bars: 3 μm(A); 4 μm (B); 10 μm (C–F).
Figure 6.
Figure 6.
ML phylogeny of Inosperma africanum, I. bulbomarginatum and I. flavobrunneum based on ITS dataset.
See this image and copyright information in PMC

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