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This is the first record of the species since its original collection in 1988 and subsequent formal description approximately 30\u00a0years ago. We present an integrative redescription of\n                    <jats:italic>T. brasiliensis<\/jats:italic>\n                    based on detailed morphological analysis with scanning electron microscopy. It is a coded redescription with a molecular marker (COI), comprehensive notes on its habitat. The species was found exclusively along the riverbank, restricted to a single sector of the aphotic zone, approximately 40\u00a0m from the main cave entrance; both adults and juveniles were observed, indicating a functional and reproductive population. The detailed morphological documentation presented here allows robust comparisons with all known species of\n                    <jats:italic>Troglobius<\/jats:italic>\n                    , and other members of family Paronellidae, contributing to refining species diagnosis and providing a standardized framework for future taxonomic and conservation studies involving subterranean fauna.\n                  <\/jats:p>","DOI":"10.1007\/s13744-026-01427-1","type":"journal-article","created":{"date-parts":[[2026,9,14]],"date-time":"2026-09-14T07:47:49Z","timestamp":1789372069000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["The Elusive Troglobius brasiliensis (Collembola: Paronellidae), a Critically Endangered Species Rediscovered and Redescribed in Its Habitat and Food Web"],"prefix":"10.1007","volume":"55","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9026-1129","authenticated-orcid":false,"given":"Douglas","family":"Zeppelini","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4613-7673","authenticated-orcid":false,"given":"Roniere Andrade","family":"de Brito","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7544-3944","authenticated-orcid":false,"given":"Aila Soares","family":"Ferreira","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bruna Carolline Hon\u00f3rio","family":"Lopes","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9030-4339","authenticated-orcid":false,"given":"Nathan Paiva","family":"Brito","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8931-2443","authenticated-orcid":false,"given":"Misael Augusto","family":"de Oliveira Neto","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1680-4818","authenticated-orcid":false,"given":"Estevam Cipriano Araujo","family":"de Lima","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2026,9,14]]},"reference":[{"key":"1427_CR1","unstructured":"Brasil. 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The morphological matrix and associated scripts are available in the repository:\n                      \n                      .","order":3,"name":"Ethics","label":"Data Transparency","group":{"name":"EthicsHeading","label":"Declarations"}}],"article-number":"86"}}