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...

A new species of Neochelas Pett, Grismado & Ramírez, 2026 (Araneae: Trachelidae) from Chiapas, Mexico

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A new species of Neochelas Pett, Grismado & Ramírez, 2026 (Araneae: Trachelidae) from Chiapas, Mexico

Abstract

A new species of the genus Neochelas Pett, Grismado & Ramírez, 2026 (Trachelidae) is described based on specimens of both sexes collected from Tacaná Volcano, Chiapas, Mexico. This species, N. marialuisae sp. nov., is tentatively assigned to the tranquillus species group, as it possesses at least one helicoid coil at the base of the embolus, a feature shared with other North American members of the group.

Se describe una nueva especie del género Neochelas Pett, Grismado & Ramírez, 2026 (Trachelidae) con base en ejemplares de ambos sexos recolectados en el Volcán Tacaná, Chiapas, México. Esta especie, N. marialuisae sp. nov., se asigna tentativamente al grupo de especies tranquillus, ya que posee una vuelta helicoidal en la base del émbolo, una característica compartida con otros miembros norteamericanos del grupo.

David Chamé-Vázquez, Eduardo Rafael Chamé-Vázquez "A new species of Neochelas Pett, Grismado & Ramírez, 2026 (Araneae: Trachelidae) from Chiapas, Mexico," The Pan-Pacific Entomologist, 102(2), 96-103, (30 June 2026) https://doi.org/10.3956/2025-102.2.96