The flow of fungal diversity: revisiting freshwater Dothideomycetes from the Amazon

Heloysa Farias da Silva, André Santos Alves de Aquino Monte, Flávia Rodrigues Barbosa, Bruno Tomio Goto, Luís Fernando Pascholati Gusmão, Josiane Santana Monteiro & Patricia Oliveira Fiuza

Sydowia 78: 291-300

Published online on January 12th, 2026

This study is a bibliometric analysis of Dothideomycetes recorded in freshwater environments of the Amazon region from 1962 to 2025. A search of online scientific databases retrieved 14 studies, reporting a total of 153 Dothideomycetes taxa from Amazonian areas, distributed across 14 orders, 35 families, and 69 genera. The orders Pleosporales (60 taxa) and Tubeufiales (18taxa) were the most represented, followed by Jahnulales (11 taxa) and Capnodiales (10 taxa). The results indicate that samplingefforts were conducted in Brazil (Belém, Imeri, Tapajós and Xingu), French Guiana (Guiana), Venezuela (Guiana), and Peru (Napoand Inambari). Ecological analyses revealed a latitudinal gradient in Dothideomycetes families richness across the Amazon, with higher values in regions with higher sampling effort. The Imeri and Guiana regions showed the highest taxon similarity (20 %), despite limited data. These patterns highlight the need for standardized sampling and multivariate analyses to improve access to fungal diversity. Considering the high diversity and environmental heterogeneity of the region, further surveys are essential to assess the richness, diversity, and biogeographic patterns of Dothideomycetes inhabiting freshwater habitats in underexplored areas.

Keywords: Ascomycota, aquatic fungi, diversity, lotic environments.

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