Asexual sporesporeasexual (= mitosporemitosporeAgaricomycetes) formation is occasionally observed in species in AgaricomycetesAgaricomycetesasexual sporulation (BasidiomycotaBasidiomycotaasexual sporulation), but more often it is probably overlooked. Reports of this phenomenon seem rather to be random and not very well-founded, unless mitosporesmitosporesblastospores are used for taxonomytaxonomymitospores. There are three main types of mitosporesmitosporesarthrospores, whose characteristics and parameters of production however sometimes overlap. Arthrosporesarthrosporesoidia (arthroconidiaarthrosporesarthroconidia, oidiaoidiaarthrospores) are generated by schizolyticschizolyticarthrospores or rhexolyticrhexolyticarthrospores splitting of preformed hyphae, blastosporesblastosporesblastoconidia (blastoconidiablastoconidiabudding) by budding outside the hyphal cells, and large, mostly thick-walled and swollen chlamydosporeschlamydospores develop inside the hyphal cells. All types of mitosporesmitoporesintercalary may form intercalarily or terminallymitosporesterminal on hyphae. Species lists of mitosporesmitosporesblastospores from reports in the recent literature are provided, adding to the compilation in the third edition of The Mycota I. Overall, arthrospores are more common in AgaricalesAgaricalesmitospores and chlamydospores in PolyporalesPolyporaleschlamydospores and in BankeraceaeBankeraceaechlamydospores (in rhizomorphsrhizomorphs or in the ectomycorrhizal mantle of ECMECMectomycorrhizal mantle species) of ThelephoralesThelephoraleschlamydospores. Blastospores are generally less frequently reported in the Agaricomycetes but appear to be more typical of the agaric genus Hohenbueheliablastospores, the CantharellalesCantharellalesblastospores, and the RussulalesRussulalesblastospores. Ecological behavior could play a role—for example, which types of mitosporesmyceliamitospores are formed by which species, in what quantities, when, and for what reason. Arthro- and blastospores might primarily be produced for reproduction and dispersal, chlamydospores for duration. Mitospores occur in species regardless of their breeding behavior. In the most frequently occurring heterothallicheterothallic species, mitospores may occur on mycelium before and/or after matingmating, while regulatory schemes of production may differ. On mated myceliamyceliamated, mitosporesmyceliamitospores can be homokaryotic, as on primary mycelium, or heterokaryotic, as is the producing mycelium. Modes of asexual sporulationasexual sporulationAgaricomycetes, function, and regulation of production have so far only been studied in detail in a few species, at best in the inkcap Coprinopsis cinereaasexual sporulation where several environmental and genetic regulatory functions have already been discovered. Pertinent mitosporesAgaricomycetesmitospores of Agaricomycetes are used in scientific research for mutantmutantgeneration generation and DNA transformation,transformationDNA and they can also have potential applications in industry, agriculture, and forestry.