A comparison of adhesive performance among six cursorial spider species

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  A comparison of adhesive performance among six cursorial spider species Abstract The ability to adhere to surfaces is particularly relevant for cursorial predatory arthropods like hunting spiders, which often traverse relatively complex environments characterized by large variation in substrate properties. Here, we evaluated the adhesive performance of six hunting spider species that are common in eastern temperate North America and lack specialized tarsi for climbing smooth or inclined surfaces [Lycosidae: Pardosa lapidicina Emerton, 1885 and Rabidosa rabida (Walckenaer, 1837); Oxyopidae: Oxyopes salticus Hentz, 1845; Pisauridae: Pisaurina mira (Walckenaer, 1837); Dolomedidae: Dolomedes triton (Walckenaer, 1837), and Dolomedes scriptus Hentz, 1845]. We tested adhesion performance as shear load resistance (g) on a glass plate, and as the angle of failure (°) when the plate was gradually inclined relative to horizontal. Average angle of failure and shear resistance differed among ...

Report of giant vinegaroon (Thelyphonida: Thelyphonidae) predation by scorpion (Scorpiones: Buthidae) in Mexican tropical dry forest

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Report of giant vinegaroon (Thelyphonida: Thelyphonidae) predation by scorpion (Scorpiones: Buthidae) in Mexican tropical dry forest

Abstract
This study reports the first documented case of predation of an early instar thelyphonid, Mastigoproctus sp., by the scorpion Centruroides elegans in a dry tropical forest in Mexico. The overlap in microhabitats between these two species suggests that their encounters are facilitated by the errant behavior of C. elegans. Our findings contribute to the understanding of the ecological dynamics involving thelyphonids and highlight the vulnerability of juvenile stages to predation, expanding the known predators of these arachnids. 
André F. A. Lira, Oscar G. del-Pozo, Gerardo A. Contreras-Félix, Report of giant vinegaroon (Thelyphonida: Thelyphonidae) predation by scorpion (Scorpiones: Buthidae) in Mexican tropical dry forest, Acta Arachnologica, 2025, Volume 74, Issue 2, Pages 123-124, Released on J-STAGE December 11, 2025, Online ISSN 1880-7852, Print ISSN 0001-5202, https://doi.org/10.2476/asjaa.74.123, https://www.jstage.jst.go.jp/article/asjaa/74/2/74_123/_article/-char/en