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Issue: Vol. 5632 No. 3: 8 May 2025
Type: Article
Published: 2025-05-08
DOI: 10.11646/zootaxa.5632.3.10
Page range: 580-594
Abstract views: 56
PDF downloaded: 6

The rare Adisianus Bretfeld (Collembola, Bourletiellidae): a new species from Northeastern Brazil and an identification key to the genus

Department of Botany and Zoology; Biosciences Center; Federal University of Rio Grande do Norte; Natal; Rio Grande do Norte; Brazil
Department of Botany and Zoology; Biosciences Center; Federal University of Rio Grande do Norte; Natal; Rio Grande do Norte; Brazil
Biodiversity and Biotechnology Research Group of North Center Piaui; Federal Institute of Education; Science and Technology of Piaui; Pedro II; Piaui; Brazil
Department of Botany and Zoology; Biosciences Center; Federal University of Rio Grande do Norte; Natal; Rio Grande do Norte; Brazil
Collembola Caatinga-Cerrado transitional region chaetotaxy Sminthuroidea Sphyrothecinae Symphypleona

Abstract

Bourletiellidae (Symphypleona, Appendiciphora, Sminthuroidea) comprises several genera exclusively distributed across tropical and subtropical regions worldwide. Adisianus Bretfeld, a genus within this family, is found in the Neotropical Region and currently includes only three species described from forested areas in Brazil and Mexico. Here we revisit the genus describing a new species, Adisianus pinheadi sp. nov., from a transitional area between the Cerrado and Caatinga biomes in the Northeastern region of Brazil. The new species is more similar to A. fuscus (Bretfeld) and A. maculatus (Bretfeld) in the presence of rough blunt spine-like chaetae on antennae, dorsal head and large abdomen, but it is unique in the combination of its color pattern, antennal and head chaetotaxy, and number of chaetae on manubrium and tenaculum. We also update the diagnosis of the genus, provide an identification key to its species, and discuss its similarities with the Sphyrothecinae (Sminthuridae), along with the potential implications for the internal relationships within Symphypleona.

 

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How to Cite

Rodrigues, I.V.B., Medeiros, G.D.S., Nunes, R.C. & Bellini, B.C. (2025) The rare Adisianus Bretfeld (Collembola, Bourletiellidae): a new species from Northeastern Brazil and an identification key to the genus. Zootaxa, 5632 (3), 580–594. https://doi.org/10.11646/zootaxa.5632.3.10