OniscidBase: A call for contributions to a global database to advance terrestrial isopod research

Konstantin B. Gongalsky & et al.248 SOIL ORGANISMS 97 (3) 2025 31 Institute for Alpine Environment, Eurac Research, Viale Druso 1, Bozen/Bolzano, Italy 32 Faculty of Breeding, Bioengineering and Animal Protection, Warsaw University of Life Sciences, Ciszewskiego 8, Warszawa, Poland 33 Senckenberg Museum of Natural History Görlitz, Germany 34 Research Institute on Terrestrial Ecosystems, National Research Council (CNR-IRET), Via Madonna del Piano 10, Sesto Fiorentino, Italy * Corresponding author, email: gongalsky@gmail.com Received 1 April 2025 | Accepted 17 July 2025 | Published online 1 December 2025 Abstract Terrestrial isopods (Isopoda: Oniscidea), commonly known as woodlice, are among the most recognisable soil-dwelling inver- tebrates and are crucial for soil functioning. They are widely distributed from temperate to equatorial ecosystems, and their distribution is strongly influenced by environmental factors, such as soil type, temperature and humidity. Terrestrial isopods have fascinated taxonomists for centuries, with over 4,100 described species across 568 genera and 38 or 39 families. These animals contribute significantly to key ecosystem processes, such as litter decomposition, nutrient cycling, and carbon sequestration. However, data on patterns of their diversity, abundance, or biomass, which are crucial for assessing their importance in ecosystem functioning worldwide, are lacking. This is partly due to the incomplete taxonomy in regions such as the tropics and the scattered nature of local georeferenced datasets. To better understand the global taxonomic patterns, species distributions, and functional roles of terrestrial isopods, we call for the compilation of a comprehensive global database that integrates taxonomy, georeferenced species records, and trait data. This database would help answer fundamental questions about the response of terrestrial isopods to environmental changes and their role in ecosystem functioning and soil health. OniscidBase, a recently launched initiative, aims to consolidate such data, facilitating the analysis of taxonomic gaps and assessing the distribution and functional importance of terrestrial isopods. The database aims to include georeferenced data on the distribution, abundance and biomass of terrestrial iso- pod species, and metadata on environmental parameters. Our main goals are to strengthen the taxonomic backbone for terrestrial isopods, make distribution data available for macroecological studies, and collect trait data to understand species responses to en- vironmental changes and effects on soils. Using these data leads to a deeper understanding of the importance of terrestrial isopods as components of terrestrial ecosystems and, at the same time, highlights future research directions.