The neonicotinoid imidacloprid impairs the predatory performance and functional response of the jumping spider Helpis minitabunda (Araneae, Salticidae)

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  The neonicotinoid imidacloprid impairs the predatory performance and functional response of the jumping spider Helpis minitabunda (Araneae, Salticidae) Abstract The neonicotinoid imidacloprid can cause lethal and sublethal effects in non-target organisms, including impaired behavior, reduced fertility, disrupted locomotion, and reduced predatory performance in arthropods. Spiders are among the most abundant arthropod predators in terrestrial ecosystems, including agricultural ecosystems, yet the effects of neonicotinoids on the predatory function of jumping spiders remain poorly understood. The functional response of a predator describes how predation rates change with prey density and is key to understanding predator–prey dynamics. We tested whether acute exposure to a commercial formulation of imidacloprid at field-recommended concentrations alters the functional response of the Aussie bronze jumping spider, Helpis minitabunda (L. Koch, 1880). We compared the predation of treat...

A new species of the genus Allomicythus, with a first record and the description of the male of Echemus viveki Gajbe, 1989 (Araneae, Gnaphosidae) from China

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A new species of the genus Allomicythus, with a first record and the description of the male of Echemus viveki Gajbe, 1989 (Araneae, Gnaphosidae) from China

Abstract

Two species of the spider family Gnaphosidae are reported from China. A new species of the genus Allomicythus Ono, 2009 is described from Fujian province, Allomicythus youzi sp. nov. (♂). The genus Echemus Simon, 1878 is recorded for the first time from China. The male of Echemus viveki Gajbe, 1989 is described for the first time and the female is redescribed. Detailed morphological descriptions, photographs, SEMs of the body and genitalia, and a distribution map of these two species are provided.

Jiang, Z., Ning, X., Yao, Y., Wang, Z. & Liu, K. (2025) A new species of the genus Allomicythus, with a first record and the description of the male of Echemus viveki Gajbe, 1989 (Araneae, Gnaphosidae) from China. Zootaxa, 5646 (1), 115–123. https://doi.org/10.11646/zootaxa.5646.1.6