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...

New considerations on the species of the genus Bothriurus Peters (Scorpiones: Bothriuridae) described or cited from the state of Paraná, Brazil and description of a new species

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New considerations on the species of the genus Bothriurus Peters (Scorpiones: Bothriuridae) described or cited from the state of Paraná, Brazil and description of a new species

Abstract

A new species, Bothriurus trifinium sp. n. is described from an area of Riparian wet-forests in the Northwest of the state of Paraná in Brazil. The new species can be associated with other species previously described from the nearby regions of Paraná but also from Mato Grosso do Sul and Paraguay. The description of this new species attests once again about the existence of micro-endemic populations within different groups of Bothriurus. Comments are also proposed on the taxonomic status of some previously described species, with one species revalidated and some synonymies suggested.

Wilson R. Lourenço, Lucienne Wilmé, Éric Ythier. New considerations on the species of the genus Bothriurus Peters (Scorpiones: Bothriuridae) described or cited from the state of Paraná, Brazil and description of a new species.. Faunitaxys, 2026, 14 (56), pp.1-10. ⟨10.57800/faunitaxys-14(56)⟩. ⟨hal-05716551⟩