Arachniotus ruber
species of fungus
Arachniotus ruber is a species of fungus belonging to the genus Arachniotus in the family Gymnoascaceae. This fungus is a mesophile that reproduces both sexually and asexually. So far, there have been no reports of the fungus being pathogenic.
History and taxonomy
Arachniotus ruber was first described by Philippe Édouard Léon Van Tieghem in 1877 and it was thought to belong to the genus, Gymnoascus, due to similarities he observed in the gametangial initials. It was not until 1893 that Schroeter transferred the species to his recently established genus, Arachniotus, due to it possessing many of the corresponding traits. At the time, Schroeter did not designate a type species for the genus, which resulted in some debate until a lectotype, A. candidus, was eventually identified by Clements and Shear in 1931. With this change, A. ruber was excluded from the Arachniotus genus because it did not display type characteristics within its ascospores (3). Consequently, Orr, Ghosh, and Roy moved the species to the genus, Pseudoarachniotus, in 1977.
Morphology
Arachniotus ruber have discrete ascomata present, usually confluent and mostly spherical, measuring 20-200 μm and are red, orange, and brown in colour. Asci of A. ruber are ovoid, hyaline, and measure 10-13 x 7-10 μm.
“Arachniotus ruber” enters the record as species of fungus. Crown Archives preserves that source wording while asking what Arachniotus, ruber and species can confirm, complicate or overturn.
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Datasets, specimens, observations and peer-reviewed methods provide the appropriate test for the technical claims summarized here. The source revision retrieved here is dated Oct 23, 2025. The linked authority identifier is Q15020858. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1877, 1893, 1931 and 1977.
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This entry incorporates text from “Arachniotus ruber” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.