New records of pseudoscorpions (Arachnida, Pseudoscorpiones) from the Caatinga biome, Brazil: a checklist and a map of species richness distribution

In the course of ongoing research on the pseudoscorpion fauna in the northeastern region of Brazil, we compiled nine pseudoscorpion species with three of them, Geogarypus amazonicus, Apolpium ecuadorense, and Pachyolpium furculiferum, recorded for the first time from the Caatinga biome. Ecological comments are included, and the presence of G. amazonicus is discussed. Additionally, an updated checklist of all pseudoscorpion species and a map of the distribution of species richness for all biomes of Brazil are presented.