Description of two new species of Progonyleptoidellus (Opiliones: Gonyleptidae), with a cladistic analysis of the genus, an overview of relationships in the K92 group, and taxonomic notes on Deltaspidium.

As part of an ongoing revision and cladistic analysis of the "K92 clade" (Gonyleptidae), the Brazilian genus Progonyleptoidellus Piza, 1940 is revised and two new species from São Paulo State are described: P. bocaina sp. nov.

Phylogeography of Sodreaninae harvestmen (Arachnida: Opiliones: Gonyleptidae): Insights into the biogeography of the southern Brazilian Atlantic Forest.

The Brazilian Atlantic Forest has long been considered a global biodiversity hotspot. In the last decade, the phylogeographic patterns of endemic taxa have been unraveling the biogeographic history of the biome. However, highly diverse invertebrate species have still been poorly studied.

Redescription of Juticus furcidens Roewer, 1943 (Opiliones: Gonyleptidae), with a discussion of its relationships in the subfamily Gonyleptinae.

As part of an ongoing revision of the largest gonyleptid subfamily, Pachylinae, we examined Juticus furcidens Roewer, 1943. This is an elusive species mentioned only in catalogues after its description. In this paper, we redescribe it according to modern standards, including its male genitalia for the first time, which exhibit typical features of the gonyleptid K92 clade.

New systematic assignments in Gonyleptoidea (Arachnida, Opiliones, Laniatores).

As part of an ongoing revision of the family Gonyleptidae, we have identified many species that are synonyms of previously described species or misplaced in this family. This article summarizes these findings, adding previously unavailable information or correcting imprecise observations to justify the presented taxonomic changes. THE FOLLOWING NEW FAMILIAL OR SUBFAMILIAL ASSIGNMENTS ARE PROPOSED: Nemastygnus Roewer, 1929 and Taulisa Roewer, 1956 are transferred to Agoristenidae, Agoristeninae; Napostygnus Roewer, 1929 to Cranaidae; Ceropachylinus peruvianus Roewer, 1956 and Pirunipygus Roewer, 1936 are transferred to Gonyleptidae, Ampycinae; Gyndesops Roewer, 1943, Haversia Roewer, 1913 and Oxapampeus Roewer, 1963 are transferred to Gonyleptidae, Pachylinae.