First record of Ceratiomyxa morchella A.L. Welden (Amoebozoa, Myxomycetes) to Southern Brazil

Ceratiomyxa morchella, characteristic of the Neotropical myxobiota, was first recorded in Brazil four decades ago in the northern region of the country. Since then, it has a known distribution only in the North and Northeast regions, occurring in the Amazon and Atlantic Forest biomes. Collecting carried out in a fragment of Mixed Ombrophylous Forest in the southern region of the country expands the known area of occurrence of the species and increases to 112 the number of species that make up the myxobiota of the state of Rio Grande do Sul.