Protostropharia semiglobata
| Protostropharia semiglobata | |
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| Growing on llama dung in South America | |
| Scientific classification | |
| Kingdom: | Fungi |
| Division: | Basidiomycota |
| Class: | Agaricomycetes |
| Order: | Agaricales |
| Family: | Strophariaceae |
| Genus: | Protostropharia |
| Species: | P. semiglobata |
| Binomial name | |
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Protostropharia semiglobata (Batsch) Redhead, Moncalvo & Vilgays (2013) |
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| Synonyms | |
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| Protostropharia semiglobata | |
|---|---|
| Mycological characteristics | |
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gills on hymenium |
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cap is convex |
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hymenium is adnate |
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stipe has a ring |
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spore print is purple-black |
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ecology is saprotrophic |
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edibility: edible, but unpalatable |
Protostropharia semiglobata, commonly known as the dung roundhead, the halfglobe mushroom, or the hemispheric stropharia, is an agaric fungus of the family Strophariaceae. A common and widespread species with a cosmopolitan distribution, the fungus produces mushrooms on the dung of various wild and domesticated herbivores. The mushrooms have hemispherical straw yellow to buff-tan caps measuring 1–4 cm (0.4–1.6 in), greyish gills that become dark brown in age, and a slender, smooth stem 3–12 cm (1.2–4.7 in) long with a fragile ring.
The species was first described as Agaricus semiglobatus by August Batsch in 1786. It has had a complicated taxonomic history, having been shuffled to many different genera. In addition to Agaricus the species has been placed in Coprinus, Geophila, Psalliota, and Psilocybe. French mycologist Lucien Quélet gave it its most commonly used name in 1872 when he transferred it to Stropharia. In 2013, Scott Redhead made it the type species of Protostropharia, a new genus circumscribed to contain Stropharia species characterized by the formation of astrocystidia rather than acanthocytes on their mycelium. A form sterilis and two varieties, minor and radicata, described by F.H. Møller in 1945, are no longer considered to have independent taxonomic significance.
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