Pseudosperma arenarium (Inocybaceae), a new poisonous species from Eurasia, based on morphological, ecological, molecular and biochemical evidence
Ya-Ya Yan, Jukka Vauras, Li-Na Zhao, Hai-Jiao Li, Fei Xu, Yizhe Zhang, Yu‐guang Fan
MycoKeys August 30, 2022 DOI: 10.3897/mycokeys.92.86277 (opens in new tab)
Study at a glance
AI-extracted from the abstract| Characteristics | Taxonomic description with chemical analysis Peer reviewed |
|---|---|
| Population | Pseudosperma arenarium specimens from northwestern China and northern Europe |
| Keywords | Agaricales Mushroom Botany Ibotenic acid Toxin Pileus Ecology |
| Citations | 7 |
| Key points | Pseudosperma arenarium is a new muscarine-containing mushroom species with toxin concentrations roughly five times higher in the cap than in the stem. |
Abstract
In this study, Pseudosperma arenarium is proposed as a new species, based on morphological, ecological, molecular and biochemical evidence. The new species grows on sandy ground under Populus and Pinus sylvestris in north-western China and northern Europe, respectively. It is characterised by the combination of the robust habit, nearly glabrous pileus, large cylindrical basidiospores, thin-walled cheilocystidia and ecological associations with Populus alba × P. berolinensis and Pinus sylvestris and unique phylogenetic placement. Additionally, a comprehensive toxin determination of the new species using ultra-high performance liquid chromatography-tandem mass spectrometry was conducted. Results showed that it was a muscarine-positive species. The content were approximately five times higher in the pilei [4012.2 ± 803.1–4302.3 ± 863.2 mg/kg ( k = 2, p = 95%)] than in the stipes [850.4 ± 171.1–929.1 ± 184.2 mg/kg ( k = 2, p = 95%)], demonstrating the severity of mushroom poisoning when patients consumed different parts of the poisonous mushroom. Amatoxins, phallotoxins, ibotenic acid, muscimol, psilocybin and psilocin were not detected.