Arthrosporella

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Arthrosporella is a fungus genus in the family Tricholomataceae. It is a monotypic genus, containing a single species, Arthrosporella ditopa, found in South America. The genus was described by mycologist Rolf Singer in 1970. The species was first described in 1950 as Armillariella ditopa, but Singer later noted it was unusual because it had both sexual (teleomorph) and asexual (anamorphic) forms that produced arthrospores, so he created Arthrosporella and gave the anamorph the name Nothoclavulina ditopa. The known material comes from the type collection, and the agaricoid half of the specimen has been lost. In 2005, reported related species turned out to belong to different genera (Arthromyces and Blastosporella) described in 2007, so Arthrosporella remains a single, little-known species.