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

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  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 species of Raveniola Zonstein, 1987 (Araneae, Nemesiidae) from Jinggangshan National Nature Reserve, Jiangxi Province, China

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Seasonal Variation in Whole-Body Elemental Concentrations and Excreta Production of a Riparian Orb-Weaving Spider (Larinioides cornutus)

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First documented cases of invertebrate predation by greater grisons (Galictis vittata)

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Two new spider species of the genus Melpomene O. Pickard-Cambridge, 1898, from Colombia and Panama with complementary description of M. panamana (Petrunkevitch, 1925) (Araneae: Agelenidae)

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Modelling the potential distribution and conservation scenarios for the troglobitic spider Pinelema elinae Brescovit, Gallão & Cizauskas, 2023 (Telemidae) in the Neotropics: palaeoclimatic evidence and current threats

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Hemostasis-Modulating Proteins from Indian Elapid and Viper Snake Venom: Mechanistic Insights and Therapeutic Opportunities

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In Memoriam: Giraldo Alayón García

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The first genus with four sac-like structures in the vulva in the cobweb spider subfamily Theridiinae Sundevall, 1833 (Araneae: Theridiidae)

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A new species of Urupelma Kaderka et al. 2023 from Peru (Araneae, Theraphosidae, Theraphosinae), and a new proposal of homologous keels

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Phase response curve and RNA-sequencing demonstrate spiders’ sensitivity to light and pinpoint candidate light-responsive genes

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The Arachnological Collection (Chelicerata, Arachnida) at the Federal University of Bahia, Brazil: taxonomic status, temporal patterns, geographic coverage and data availability

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Novel Biochemical Findings from Bothrops marajoensis Venom

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The Asian Dragon Puzzle: how multiple dispersal events have shaped the evolutionary history of Eastern Asian dragon pseudoscorpions (Arachnida: Pseudoscorpiones: Allochthonius)

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New records and invasion risk of Stenochrus portoricensis Chamberlin, 1922 (Schizomida: Hubbardiidae) in Brazil

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Distribution of scorpions (arachnida: scorpiones) according to inaturalist observations in Panama

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