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New records of Barbeyella minutissima (Myxomycetes, Echinosteliales) with an updated distribution map

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The rare myxomycete Barbeyella minutissima is known preferentially from montane coniferous biomes of the Northern Hemisphere. Despite being a relatively widespread species, the distributional limits of Barbeyella are still unknown in the tropics and the entire Southern Hemisphere. Herein, we provide records for the species from two new localities, one in southern Vietnam and the other in New Zealand. In Vietnam the species was recorded several times in mid-elevation pine forests of the Dalat Plateau within typical forest habitat types, including moist large coarse woody debris covered by dense mats of liverworts and mosses. This indicates that B. minutissima can survive in areas with monsoon tropical climate, using very specific microhabitats. In New Zealand, the species was associated with the canopy litter microhabitat in a temperate rainforest in the extreme southwestern portion of the South Island. This record is particularly unusual because B. minutissima was recorded from moist chamber cultures and not as a field collection. Morphological characters of our specimens correspond well with the description of this morphospecies. The new records considerably expand the known distribution of Barbeyella, which now also includes tropical mountains and temperate rainforests. An updated world distribution map and a predictive map, estimating the probability to encounter the species in a certain region from macroclimatic data, were constructed.
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Keywords: AMOEBOZOA; CANOPY LITTER; DISTRIBUTION EXTENSION; MYXOGASTRIA; SLIME MOLDS; TROPICS

Document Type: Research Article

Publication date: August 1, 2019

This article was made available online on April 25, 2019 as a Fast Track article with title: "New records of Barbeyella minutissima (Myxomycetes, Echinosteliales) with an updated distribution map".

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  • Nova Hedwigia is an international journal publishing original, peer-reviewed papers on current issues of taxonomy, morphology, ultrastructure and ecology of all groups of cryptogamic plants, including cyanophytes/cyanobacteria and fungi. The half-tone plates in Nova Hedwigia are known for their high quality, which makes them especially suitable for the reproduction of photomicrographs and scanning and transmission electron micrographs.
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