ADDRESSING KNOWLEDGE GAPS IN BRAZILIAN CAVE FAUNA: DESCRIPTION OF A NEW GENUS AND NEW SPECIES OF PSEUDOSCORPIONS (ARACHNIDA: PSEUDOSCORPIONES: CHTHONIIDAE)
Pseudoscorpiones, Chthoniidae, Taxonomy, Cave-dwelling
This study addresses significant knowledge gaps regarding Brazilian subterranean biodiversity by focusing on the pseudoscorpion family Chthoniidae, aiming to resolve taxonomic inconsistencies and describe new taxa crucial for cave conservation. Through the examination of museum and fresh material, the research first reassesses the status of Pseudochthonius orthodactylus Muchmore, 1970, a species historically noted for its divergent morphology; based on distinct straight chelae and dental arrangements, the new genus Kayapochthonius gen. nov. is proposed, comprising the recombined type species Kayapochthonius orthodactylus comb. nov. and the newly described Kayapochthonius diamantinus sp. nov. from Chapada Diamantina. Furthermore, the study expands the knowledge of the genus Pseudochthonius in Northeastern Brazil by describing three new species from limestone caves in Ceará: the troglobitic Pseudochthonius ubajara sp. nov. and Pseudochthonius andyratinga sp. nov. from Ubajara National Park, and the troglophilic Pseudochthonius tejussuoca sp. nov. from Tejuçuoca. Significantly, this research documents the first known case of sympatry within the genus, observing the co-occurrence of P. ubajara and P. andyratinga in Morcego Branco Cave, and provides an identification key to support future ecological and conservation efforts in these threatened karst ecosystems.