Remarkable micro-endemism and high congeneric richness: eight new cave-restricted species of Pseudochthonius Balzan, 1892 (Pseudoscorpiones, Chthoniidae) from the Brazilian semi-arid

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  Remarkable micro-endemism and high congeneric richness: eight new cave-restricted species of Pseudochthonius Balzan, 1892 (Pseudoscorpiones, Chthoniidae) from the Brazilian semi-arid Abstract Eight new species of pseudoscorpions belonging to the genus Pseudochthonius Balzan, 1892 are described from the semi-arid region of Brazil. Comprehensive morphological descriptions, diagnostic characters, detailed illustrations, and ecological remarks of the habitats are provided for Pseudochthonius celestialis sp. nov., P. caritas sp. nov., P. patientia sp. nov., P. temperantia sp. nov., P. diligentia sp. nov., P. castitas sp. nov., P. humilitas sp. nov., and P. benignitas sp. nov. In addition, we present a brief discussion of the potential factors underlying the remarkable congeneric species richness observed in this geographically restricted region, as well as the principal threats faced by these species. These findings underscore the importance of conserving caves in order to pr...

Predatoroonops naru (Araneae: Oonopidae): a new goblin spider species from Brazil

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Predatoroonops naru (Araneae: Oonopidae): a new goblin spider species from Brazil

Abstract 

A new species, Predatoroonops naru sp. nov. (Araneae: Oonopidae: Oonopinae), is described based on specimens collected in the Reserva Biológica Duas Bocas, municipality of Cariacica, state of Espírito Santo, Brazil. The description is based on both male and female specimens, providing a detailed morphological characterization of the species. This record expands the knowledge of the genus diversity in the Atlantic Forest and highlights the importance of protected areas for maintaining the diversity of leaf-litter spiders in this biome.

Oliveira-Santos, M. & Santos, A. J. (2026). Predatoroonops naru (Araneae: Oonopidae): a new goblin spider species from Brazil. Arachnology 20(5): 688-692.