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

  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 Plesiopelma from Uruguay (Araneae, Theraphosidae, Theraphosinae)

 


A new species of Plesiopelma from Uruguay (Araneae, Theraphosidae, Theraphosinae)

Abstract

We describe and illustrate a new tarantula species of the genus Plesiopelma from Lavalleja and Maldonado, Uruguay. Plesiopelma arevaloae sp. nov. is distinguished from other known species by morphological characters and molecular evidence.

Arias, V., Hilario, M., Ferretti, N., & Pérez-Miles, F. (2024). A new species of Plesiopelma from Uruguay (Araneae, Theraphosidae, Theraphosinae). Boletim do Museu Paraense Emílio Goeldi. Ciências Naturais, 19(3), e2024-1001. http://doi.org/10.46357/bcnaturais.v19i3.1001