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Peer-reviewedCC BYNeotropical entomology

Lagoa Misteriosa, a novel source of beetle diversity: two new species of Brazilian riffle beetles (Insecta: Coleoptera: Elmidae: Elminae) with immatures from a karst sinkhole.

  • Thiago Tadeu Silva Polizei1,2
  • Éverton G M Neves3,4,5
  • Sônia A Casari6
  • Anderson Ferreira5,7
7 affiliations
  1. 1Lab de Coleoptera (LaC), Museu de Zoologia da Universidade de São Paulo (MZSP), Av. Nazaré 481, São Paulo, SP, CEP 04263-000, Brazil. [email protected].
  2. 2Instituto Tecnológico Vale (ITV), Rua Boaventura da Silva, Belém, Pará, 955, CEP 66055-090, Brazil. [email protected].
  3. 3Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais (PEA), Universidade Estadual de Maringá (UEM), Maringá, Paraná, Brazil.
  4. 4Centro de Ciências Biológicas, Depto de Biologia, Lab de Ecologia de Lagos Rasos e Invasões (LESLIN), Universidade Estadual de Maringá (UEM), Maringá, Paraná, Brazil.
  5. 5Faculdade de Ciências Biológicas e Ambientais, Lab de Ecologia Aquática (LEAqua), Univ Federal da Grande Dourados (UFGD), Dourados, Mato Grosso Do Sul, Brasil.
  6. 6Lab de Coleoptera (LaC), Museu de Zoologia da Universidade de São Paulo (MZSP), Av. Nazaré 481, São Paulo, SP, CEP 04263-000, Brazil.
  7. 7Universidade Federal da Grande Dourados (UFGD), Programa de Pós-Graduação em Biodiversidade E Meio Ambiente (PPGBMA), Dourados, Mato Grosso Do Sul, Brasil.
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Abstract

Elmidae comprises the largest aquatic family of Dryopoidea, with 1,650 species recorded worldwide. Brazil has the most diversity with 210 described species. Although this number has increased in recent years, in some Brazilian geographical regions there are knowledge gaps in the distribution of fauna, especially based on immature stages. After a yearlong aquatic insect survey conducted in a karst sinkhole located in Jardim municipality, Mato Grosso do Sul State, Brazil, we found an endemic and novel beetle fauna which included new species. Here we present a taxonomic description of two new species of Elmidae, Microcylloepus dimorphus sp. nov. and Hexacylloepus misteriosa sp. nov., based on males, females, and immatures. These new species represent the first Brazilian Elmidae described from a lentic habitat. Also, we provide photographic images of the habitus, SEM images, and illustrations of the diagnostic structures for both species, including their immatures, and habitat notes about Lagoa Misteriosa.

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Cite

BibTeXRIS
BibTeX
@article{polizei2026lagoa,
  title = {{Lagoa Misteriosa, a novel source of beetle diversity: two new species of Brazilian riffle beetles (Insecta: Coleoptera: Elmidae: Elminae) with immatures from a karst sinkhole.}},
  author = {Thiago Tadeu Silva Polizei and Éverton G M Neves and Sônia A Casari and Anderson Ferreira},
  journal = {Neotropical entomology},
  year = {2026},
  month = oct,
  doi = {10.1007/s13744-026-01441-3},
  url = {https://europepmc.org/article/MED/42909524},
  note = {CC BY},
}
RIS
TY  - JOUR
TI  - Lagoa Misteriosa, a novel source of beetle diversity: two new species of Brazilian riffle beetles (Insecta: Coleoptera: Elmidae: Elminae) with immatures from a karst sinkhole.
AU  - Thiago Tadeu Silva Polizei
AU  - Éverton G M Neves
AU  - Sônia A Casari
AU  - Anderson Ferreira
PY  - 2026
DA  - 2026/10/23
JO  - Neotropical entomology
DO  - 10.1007/s13744-026-01441-3
UR  - https://europepmc.org/article/MED/42909524
AB  - Elmidae comprises the largest aquatic family of Dryopoidea, with 1,650 species recorded worldwide. Brazil has the most diversity with 210 described species. Although this number has increased in recent years, in some Brazilian geographical regions there are knowledge gaps in the distribution of fauna, especially based on immature stages. After a yearlong aquatic insect survey conducted in a karst sinkhole located in Jardim municipality, Mato Grosso do Sul State, Brazil, we found an endemic and novel beetle fauna which included new species. Here we present a taxonomic description of two new species of Elmidae, Microcylloepus dimorphus sp. nov. and Hexacylloepus misteriosa sp. nov., based on males, females, and immatures. These new species represent the first Brazilian Elmidae described from a lentic habitat. Also, we provide photographic images of the habitus, SEM images, and illustrations of the diagnostic structures for both species, including their immatures, and habitat notes about Lagoa Misteriosa.
SN  - 1519-566X
SN  - 1678-8052
ER  -