October 13, 2025Zootaxa

Two new species of Tyrannochthonius Chamberlin, 1929 (Pseudoscorpiones: Chthoniidae) from caves in Brazilian semiarid region.

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Morphological descriptions identify two new Tyrannochthonius species in Brazil, highlighting their subterranean habitats.

Two new species of pseudoscorpions have been identified, expanding the diversity of Tyrannochthonius in Brazil.
Morphological descriptions and diagnostic characters for Tyrannochthonius iuiu and Tyrannochthonius aratu provide vital taxonomic information.
The study emphasizes the importance of conserving caves in Brazil, which harbor specialized species with limited ranges.
An identification key for all known Tyrannochthonius species in Brazil has been compiled to assist further research.

GUIMARÃES et al. (2025) studied this question.

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