During June-July 2008 the author visited Paraguay with the objective of collecting myxomycetes, and substrates from which they might be cultured. This resulted in a count of 73 species, bringing the total for the country to 90 species. A new species, Physarum minutum, is described.

Twenty-eight species of myxomycetes and other related organisms not previously known to occur in Australia are reported along with 78 new state records. Records were obtained from collections made in the field and from moist chamber cultures prepared with samples of various types of organic material known to support the growth of myxomycetes. The majority of these samples consisted of bark from living trees and shrubs but some samples of litter, both ground and aerial, and dung also were collected. Physarum crateriforme var. columellatum comb. et stat. nov. is proposed as a new name. The number of species recorded from the continent now stands at 177, which represents approximately 20% of the total number of world species.

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