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 tarantula species of the genus Orphnaecus Simon, 1892 (Araneae: Theraphosidae) from Mindanao Island, Philippines

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A new tarantula species of the genus Orphnaecus Simon, 1892 (Araneae: Theraphosidae) from Mindanao Island, Philippines

The genus Orphnaecus currently comprises three species found in the Philippine islands of Luzon, Polillo, and Dinagat. Orphnaecus mimbilisanensis sp. n. is described based on specimens collected from Mimbilisan Protected Landscape, Misamis Oriental in Mindanao Island, Philippines. The new species is the first Orphnaecus species of the vast mainland Mindanao and is distinguished from all known congeners by its carapace profile, leg, and genital morphology, as well as distribution.

(2025). A new tarantula species of the genus Orphnaecus Simon, 1892 (Araneae: Theraphosidae) from Mindanao Island, Philippines. Far Eastern entomologist. 522. 10.25221/fee.522.2.