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 ...

The Vouched, the Unvouched, and a Digital Phantom: Four Spiders (Araneae) Published for, but Not Occurring in, Ireland

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The Vouched, the Unvouched, and a Digital Phantom: Four Spiders (Araneae) Published for, but Not Occurring in, Ireland

Abstract

The gnaphosid spider Zelotes subterraneus (C. L. Koch, 1833) is formally deleted from the Irish list. The names of three spider species recently published for Ireland would constitute the first Irish records; however, voucher specimens were not collected. Therefore, these species have not been safely shown to be established in Ireland and the names should not be included in an Irish checklist. One of the species is now mapped for Ireland in several digital datasets from two independent putative observations. The importance of robust filtering criteria to avoid such eventualities is noted.

Myles Nolan and Sylvia Voss. The vouched, the unvouched and a digital phantom; four spiders (Araneae) published for, but not occurring in Ireland: pp 280-286. https://www.irishbiogeographicalsociety.com/