Joining the dark side: waterfall spiders in subterranean habitats, with the description of a new genus and two new species from Brazil (Araneae: Trechaleidae)

  Joining the dark side: waterfall spiders in subterranean habitats, with the description of a new genus and two new species from Brazil (Araneae: Trechaleidae) Abstract Trechaleidae is a family of spiders often recognized by its semiaquatic species, but its diversity extends beyond these well-known examples. In this study, we describe Troglotrechalea gen. nov. , a new genus with two novel species, T. faleroae spec. nov. and T. agorai spec. nov. , found exclusively in subterranean habitats within karst formations in central and southeastern Brazil. Both species exhibit pale coloration, but unmodified eyes and legs if compared to other species in the family. The slight degree of troglomorphism, along with their geographic and habitat records, suggests that these species are restricted to hypogean habitats, although they probably move through epigean habitats. Additionally, we report in detail the occurrence of the trechaleid genera Enna O. Pickard-Cambridge, 1897, Heidrunea Brescovi...

A new Nemesia species from Spanish Catalonia (Araneae, Mygalomorphae, Nemesiidae, Haplonemesia)

 


A new Nemesia species from Spanish Catalonia (Araneae, Mygalomorphae, Nemesiidae, Haplonemesia)

Abstract

Both sexes of Nemesia gavarrensis sp. nov. are described from northeastern Spanish Catalonia. N. gavarrensis is considered the fourth species to be included in the subgenus Haplonemesia Simon 1914, that furthermore includes: N. simoni Pickard-Cambridge 1874, N. crassimana Simon 1873, N. raripila Simon 1914. Haplonemesia is a morphologically, geographically and ecologically unified group of four nominal species inhabiting sheltered habitats in and around the eastern Pyrenees. A key to distinguish Haplonemesia species is provided.

Decae, A. & Bosselaers, J. (2026). A new Nemesia species from Spanish Catalonia (Araneae, Mygalomorphae, Nemesiidae, Haplonemesia). Zootaxa 5821(1): 93-106. doi: 10.11646/zootaxa.5821.1.6