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 ...

A new species of Trachelas L. Koch, 1872 in the bispinosus-group from Colombia (Araneae: Trachelidae)

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A new species of Trachelas L. Koch, 1872 in the bispinosus-group from Colombia (Araneae: Trachelidae)

Abstract
Trachelas amacayacu sp. nov. is described from Amacayacu National Park, Amazonas Department, Colombia based on a holotype female with distinct genital morphology. The type was deposited in the Manchester Museum (MMUE), Manchester, UK. Trachelas nigrifemur Mello-Leitão, 1941 from Cúcuta, Norte de Santander, Colombia is proposed as a nomen dubium.

Sherwood, Danniella & Buelvas, Diana. (2025). A new species of Trachelas L. Koch, 1872 in the bispinosus-group from Colombia (Araneae: Trachelidae). Revista Ibérica de Aracnología. 47. 87-89.