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 ...

Taxonomic redescription of Tityus (Tityus) proseni Abalos 1954 (Scorpiones: Buthidae) and first record for the departments of Beni and Santa Cruz - Bolivia

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Taxonomic redescription of Tityus (Tityus) proseni Abalos 1954 (Scorpiones: Buthidae) and first record for the departments of Beni and Santa Cruz - Bolivia

Abstract

In 1954 Abalos described the species Tityus proseni with specimens found in Cochabamba-Bolivia, however, since then the data of the species have not been updated. New specimens were recently captured from the departments of Beni and Santa Cruz - Bolivia. In order to carry out a detailed redescription and expansion of the distribution data of the species in Bolivia, these were reviewed according to: its external morphology, pigmentation patterns and morphometric data. The data resulting from the analysis provide new characters for the species, not contemplated in the original description, new ranges in morphometric variables previously analyzed, new data on pigmentation patterns. On the other hand, the differential morphological and morphometric data of T. proseni with those of T. argentinus and T. sorataensis are presented, since they are apparently similar species within the country.

Humboldt-Paputsachis, Ciro, Villarreal-Carvajal, Jeysa Camila, & Fortún Fernández, Evelin Esther. (2025). Taxonomic redescription of Tityus (Tityus) proseni Abalos 1954 (Scorpiones: Buthidae) and first record for the departments of Beni and Santa Cruz - Bolivia. Journal of the Selva Andina Research Society , 16 (2), 81-91. Epub 2025 Aug 31. https://doi.org/10.36610/j.jsars.20252326