Morphology, multilocus phylogeny, and toxin analysis reveal two new species of Amanita section Amanita (Amanitaceae) from China
Yu-Ting Su, Fei Xu, Ping Zhang, Peng-Tao Deng, Meng-Meng Lai, Zuo-Hong Chen
MycoKeys June 9, 2025 DOI: 10.3897/mycokeys.118.141080 (opens in new tab)
Study at a glance
AI-extracted from the abstract| Characteristics | Taxonomic species description with molecular phylogenetic analysis Peer reviewed |
|---|---|
| Population | Amanita specimens collected in China (two new species, A. flavomelleiceps and A. parvisychnopyramis) |
| Key points | Morphological and five-gene phylogenetic analyses identify Amanita flavomelleiceps and A. parvisychnopyramis as two distinct new species from China. LC-MS/MS toxin screening detected ibotenic acid and muscimol in A. parvisychnopyramis and found neither toxin in A. flavomelleiceps. |
Abstract
Globally, many species of Amanita sect. Amanita (Amanitaceae, Agaricales) cause poisoning after consumption. Amanita flavomelleicepssp. nov. and Amanita parvisychnopyramissp. nov., two new species of A. section Amanita from China, are described here. Morphology and molecular phylogenetic analyses based on five genes (ITS, nrLSU, RPB2, TEF1-α, and TUB2) revealed these two taxa as distinct species. Amanita flavomelleicepssp. nov. is characterized by a yellowish-to-yellow pileus covered by verrucose volval remnants; a subglobose basal bulb with shortly limbate; subglobose to broadly ellipsoid, inamyloid basidiospores. Amanita parvisychnopyramissp. nov. is characterized by a brownish pileus covered by subconical volval remnants; an ovate basal bulb with a cream limbate; and subglobose-to-broadly ellipsoid, inamyloid basidiospores. Screening for the most notorious toxins by liquid chromatography tandem mass spectrometry (LC-MS/MS) revealed the presence of ibotenic acid (IBO) and muscimol (MUS) in A. parvisychnopyramis and the absence of these toxins in A. flavomelleiceps.
Citations in the library
Cited by 3
- Ibotenic Acid and Muscimol in Amanita muscaria: Chemistry, Sources of Variability, Analytical Determination, and Toxicological Significance Molecules September 13, 2026
- Development of a PCR Assay Targeting the iboH Gene to Assess the Distribution of Ibotenic Acid/Muscimol Biosynthesis Potential in the Genus Amanita Journal of Fungi September 16, 2026
- The distribution and evolution of muscarine and the ibotenic acid biosynthetic gene cluster within the genus Amanita section Amanita revealed by phylogenomics. IMA fungus January 9, 2026
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