| Riassunto: | Twenty species of Myxomycetes coliected in the Lagunas de Zempoala National Park were identified. The best represented orders were the Trichiales with 7 species and the Liceales with 6 species. A preliminary analysis of substrate’s preferences of the species suggests the existence of three categories: generalistic species, lignicole species and predominantly lignicole species but eventually growing over other substrates. Analysis of world distribution of these species shows that all of them have a fairly large range of distribution, with exception of Cribraria purpurea and Dictydium mirabile, which only have been reported from températe regions and Ceratiomyxa fruticulosa, Arcyria cinerea, Fuligo septica and Comatricha nigra that are truly cosmopolitan species.
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