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| Macromorphology of: A Inosperma africanum; B Inosperma bulbomarginatum; & Inosperma flavobrunneum Aïgnon, Yorou & Ryberg in Aïgnon, Jabeen, ... et Ryberg, 2021. |
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, molecular systematics, phylogeny, taxonomy, West Africa
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| Figure 2. Macromorphology of: A Inosperma africanum (HLA0383) B Inosperma bulbomarginatum (MR00357) C, D Inosperma flavobrunneum (HLA0367). Scale bar: 1 cm. |
Inosperma africanum Aïgnon, Yorou & Ryberg, sp. nov.
Diagnosis: Inosperma africanum is distinct from all species of Inosperma and truly outstanding by its vinaceous to red colouration.
Distribution: Currently known from Benin, Burkina Faso, Guinea, Ivory Coast, Togo.
Ecology: Scattered in Tropical Woodlands dominated by Isoberlinia doka and I. tomentosa or gallery forests dominated by Berlina grandiflora.
Etymology: africanum, referring to the distribution in Africa.
Inosperma bulbomarginatum Aïgnon, Yorou & Ryberg, sp. nov.
Diagnosis: Inosperma bulbomarginatum differs from I. flavobrunneum by the smaller size of its basidiomata and larger basidiospores. It is phylogenetically distinct from all other undescribed African Inosperma in Old World Tropical clade 2
Distribution: Currently known from Benin and Zambia.
Ecology: Scattered in Woodland dominated by Isoberlinia doka and I. tomentosa.
Etymology: bulbomarginatum referring to the presence of a marginate bulb at the base of the stipe.
Inosperma flavobrunneum Aïgnon, Yorou & Ryberg, sp. nov.
Diagnosis: Characterised by yellow to orange-brown pileus, 7–12 × 4–7 μm smooth, thick-walled, ellipsoid basidiospores with cheilocystidia measuring 23–41 × 7–10 μm, clavate, thin-walled.
Distribution: Currently known only from Benin in Soudano-Guinean zone.
Ecology: Gregarious under Woodland dominated by Isoberlinia doka, I. tomentosa and Monotes kerstingii Gilg.
Etymology: flavobrunneum referring to yellow to dark brown pileus.
Hyppolite L. Aïgnon, Sana Jabeen, Arooj Naseer, Nourou S. Yorou and Martin Ryberg. 2021. Three New Species of Inosperma (Agaricales, Inocybaceae) from Tropical Africa. MycoKeys. 77: 97-116. DOI: 10.3897/mycokeys.77.60084
