A Remarkable Discovery: Exploring a Rare Eresus and Spider Wasp Interaction

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  Photo Credit: © Antonino Rametta . All photographs are used with permission. No part of these images may be reproduced, distributed, or used in any form without the prior written permission of the photographer. A Remarkable Discovery: Exploring a Rare Eresus and Spider Wasp Interaction One of the most rewarding aspects of maintaining Arácnido Taxonomy is hearing from naturalists and photographers around the world who take the time to share their discoveries. Every so often, an email arrives that immediately captures your attention. Not because it claims to rewrite what we know about biodiversity, but because it documents something that very few people have the opportunity to witness. Recently, I was contacted by a naturalist in Sicily who shared a series of exceptionally high-quality photographs of a female ladybird spider ( Eresus ) during what appeared to be an interaction with a spider wasp. Along with the images came a simple question: "Could this be scientifically import...

Checklist and trait dataset of ground-dwelling arthropods across urban habitats in four major Italian cities

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Checklist and trait dataset of ground-dwelling arthropods across urban habitats in four major Italian cities

Abstract

Urbanization is one of the most extensive forms of land-use change globally and a major driver of biodiversity loss. Ground-dwelling arthropods are sensitive indicators of environmental change and play crucial roles in ecosystem functioning, yet trait-based data on urban arthropods remain limited. We present here an expert-curated checklist and dataset of ground-dwelling arthropods sampled across four major Italian cities—Turin, Milan, Florence and Rome—following a standardized sampling protocol. The dataset includes 297 species from six major taxonomic groups (Coleoptera Carabidae, Coleoptera Tenebrionidae, Isopoda Oniscidea, Chilopoda, Araneae, and Pseudoscorpiones), for which we report presence and activity density across cities and provide taxonomic, biogeographical, ecological, functional, morphological and genetic information. Ecological and functional traits datasets were compiled from literature, expert knowledge, and direct measurements, covering feeding habits, autoecology, habitat preference, dispersal ability, circadian activity, and body size. To our knowledge, this is the first multi-taxon, trait-based dataset of urban ground-dwelling arthropods for the Italian peninsula, providing a valuable baseline for exploring taxonomic and functional diversity across urban environments and for advancing research on how urbanization shapes ecological and evolutionary processes in ground-dwelling arthropod communities.

Gardini, P., Piquet, A., Audisio, P., Piano, E., Degiovanni, A., Fattorini, S., Galimberti, A., Gardini, G., Milano, F., Mori, E., Pioltelli, E., Zapparoli, M., Isaia, M., & Sabatelli, S. (2026). Checklist and trait dataset of ground-dwelling arthropods across urban habitats in four major Italian cities. Scientific Data. https://doi.org/10.1038/s41597-026-07300-5