An unusually complex venom system in araneophagous palp-footed spiders (Palpimanidae)

Posted by
  An unusually complex venom system in araneophagous palp-footed spiders (Palpimanidae) Venoms are key adaptive traits in many animal lineages, yet their structural and functional diversity in spiders remains poorly investigated. Here, we present an initial characterization of the venom system of palp-footed spiders (Palpimanidae), a family specialized in hunting other spiders. Using micro-computed tomography, we found that the venom glands of the single species examined, Palpimanus gibbulus , exhibit a complex, multi-lobed morphology that is unusual among araneomorph spiders. Proteo-transcriptomic analyses of two Palpimanus venoms ( P. gibbulus and P. cyprius ) revealed highly diverse putative toxin repertoires comprising hundreds of peptides and proteins, including numerous novel putative neurotoxins, cytotoxins, enzymes, and allergens. Five major families of cysteine-rich palpitoxins were identified as the dominant putative neurotoxic components in both species, displaying con...

Wildflower Strips Promote Spider Diversity and Biological Control Potential in a Semi-Arid Agroecosystem: Preliminary Insights from a Single Growing Season

Posted by

 


Wildflower Strips Promote Spider Diversity and Biological Control Potential in a Semi-Arid Agroecosystem: Preliminary Insights from a Single Growing Season

Abstract

Agricultural intensification degrades farmland biodiversity, prompting the use of wildflower strips to restore natural enemy populations. However, their spatio-temporal effects on predators in arid agroecosystems remain unclear. Therefore, we investigated ground-dwelling spiders in sown wildflower strips versus natural margins across four cropping systems in arid northwestern China using pitfall traps along a spatial gradient throughout the growing season. While the overall diversity did not differ significantly between treatments, three key patterns emerged: First, spider abundance remained stable across the spatial gradient, whereas taxonomic diversity increased significantly toward the crop interior. Second, while communities in natural margins peaked early and declined during the hot, dry mid-summer, wildflower strips maintained large populations, acting as crucial temporal refuges. Third, wildflower strips reorganized species co-occurrence networks, fostering more resilient community structures. We conclude that in water-limited environments, wildflower strips stabilize predator populations during harsh weather and enhance community resilience. These findings highlight the value of incorporating these strips when designing sustainable ecological pest management strategies for arid agroecosystems.

Tuo, M., Hu, W., Wu, D., Liu, W., Wang, S., Long, X., & Jin, Y. (2026). Wildflower Strips Promote Spider Diversity and Biological Control Potential in a Semi-Arid Agroecosystem: Preliminary Insights from a Single Growing Season. Insects, 17(7), 722. https://doi.org/10.3390/insects17070722