Data for: Diversity and distribution of testate amoebae in freshwater ecoregions of Rio de Janeiro State, Brazil

This dataset consists of two tables. The first is a presence-absence table that provides an updated list of testate amoebae found in the state of Rio de Janeiro, Brazil. It includes both historical records and new occurrence data, offering a comprehensive overview of the biogeography of testate amoebae in the region.

The second table compiles previous studies on testate amoebae in the state of Rio de Janeiro, with its primary purpose being to document the collection methods used in each research effort. Data collection was conducted in April 2024 using the research databases Scopus, Web of Science, Google Scholar, and SciELO, with search keywords in both Portuguese and English: "Testate Amoebae," "Thecamoebian," "Zooplankton" combined with "Rio de Janeiro."