Two New Species of <i>Fibrodontia</i> (<i>Trechisporales</i>, <i>Basidiomycota</i>) with a Key to Worldwide Species
<i>Fibrodontia</i> is a genus of wood-inhabiting fungi consisting of four species so far, including <i>F. gossypina</i> as generic type. Two new species, <i>Fibrodontia austrosinensis</i> and <i>F. subalba</i>, are described and illustrated from China....
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| Autores principales: | , , , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
MDPI AG
2021
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/726e2f1aab8847369f0a8cb51bd8d14b |
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| Sumario: | <i>Fibrodontia</i> is a genus of wood-inhabiting fungi consisting of four species so far, including <i>F. gossypina</i> as generic type. Two new species, <i>Fibrodontia austrosinensis</i> and <i>F. subalba</i>, are described and illustrated from China. <i>Fibrodontia austrosinensis</i> from southwestern China is characterized by a grandinioid to odontioid hymenophore with numerous small aculei, a dimitic hyphal system with scattered, smooth skeletal hyphae and ellipsoid basidiospores measuring 4.2–5.2 × 3.5–4.5 μm. <i>Fibrodontia subalba</i> from the West Tianshan Mountain in northwestern China is distinguished by an odontioid to hydnoid hymenophore, a dimitic hyphal system, and ellipsoid basidiospores measuring 3.7–4.4 × 2.8–3.4 μm. The phylogenies inferred from the data set of nuc rDNA ITS1-5.8S-ITS2 (ITS) and D1–D2 domains of nuc 28S rDNA (28S), and that of ITS, 28S, translation elongation factor (<i>tef1α</i>), and RNA polymerase II second largest subunit (<i>rpb2</i>) supported <i>Fibrodontia</i> as a monophyletic genus in the <i>Trechisporales,</i> and <i>F. austrosinensis</i> and <i>F. subalba</i> as separate lineages within <i>Fibrodontia</i>. Multi-rate Poisson Tree Processes, Automatic Barcode Gap Discovery and genetic distance methods based on ITS sequences of <i>Fibrodontia</i> also supported <i>F. austrosinensis</i> and <i>F. subalba</i> as distinct species. The taxonomic status of <i>F. fimbriata</i> that was recently transferred from <i>Cystidiodendron</i>, is briefly discussed. A key to all six known species of <i>Fibrodontia</i> is provided. |
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