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 ...

Scorpiops reinisp. n. from Yunnan, China (Scorpiones: Scorpiopidae)

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Scorpiops reinisp. n. from Yunnan, China (Scorpiones: Scorpiopidae)


Abstract

Scorpiops reini sp. n. is described from Yingjiang County (Dehong Prefecture, Yunnan Province) based on an adult pair. It can be readily discriminated from all of its congeneric geographic neighbors in Yunnan, namely S. jendeki Kovařík, 1994, S. shidian (Zhu et al., 2005), S. tongtongi Tang, 2022, and S. zhangshuyuani (Ythier, 2019). Within Yunnan, it resembles S. validus (Di et al., 2010) and S. yangi (Zhu et al., 2007) most, but can be identified by its large median ocelli (relative to the width of ocular subislet), pedipalp chelal finger morphology and pectinal tooth count. Beyond Yunnan, it shows the highest similarity with S. beccaloniae (Kovařík, 2005), from which it distinguishes itself mainly by a different chelal morphology (weaker finger lobe and notch, longer and narrower manus with chelal carinae composed of smaller and denser granules). The validity of this new species is supported molecularly (to be published). The ocular islets are reviewed for all Yunnan Scorpiops.


Tang, V. 2024 . Scorpiops reinisp. n. from Yunnan, China (Scorpiones: Scorpiopidae). Euscorpius, No. 403: 1-19. 

https://mds.marshall.edu/euscorpius/vol2024/iss403/1/