A new species of the mygalomorph spider genus Euagrus Ausserer (Araneae: Euagridae) from central Mexico and new records of E. gus Coyle from Tlaxcala

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  A new species of the mygalomorph spider genus Euagrus Ausserer (Araneae: Euagridae) from central Mexico and new records of E. gus Coyle from Tlaxcala Abstract  A new species of the spider genus Euagrus Ausserer, 1875 from temperate pine-oak forests in the states of Tlaxcala and Hidalgo, Mexico is described: E. pulque sp. nov. The description of the new species is based on male and female adult specimens. Additionally, Euagrus gus Coyle, 1988 is recorded for the very first time in the state of Tlaxcala. These species have sympatric distributions in La Malinche National Park, Tlaxcala. With this description, the diversity of the genus increases to 23 species, with Mexico harboring the highest diversity with 17 described species.  Valdez-Mondragón, A., Salinas-Velasco, H. V. & Bueno-Villegas, J. (2026). A new species of the mygalomorph spider genus Euagrus Ausserer (Araneae: Euagridae) from central Mexico and new records of E. gus Coyle from Tlaxcala. Zootaxa 5810 (...

Climate Change Increases Public Health Risks from Tityus Scorpion Stings in Brazil

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Climate Change Increases Public Health Risks from Tityus Scorpion Stings in Brazil

Abstract

Urban environments provide Tityus scorpions with abundant prey and shelter, leading to increased human-scorpion encounters and associated public health risks. In this study, we model the distribution of seven medically relevant Tityus species and project the potential impacts of climate change on their distribution across Brazil by 2060. We compiled 1,103 occurrence records from the GBIF, iNaturalist, SpeciesLink, and SiBBr databases and applied ecological niche modeling using climate projections for 2041-2060 from WorldClim. Model validation yielded high AUC values, demonstrating a strong agreement between observed distributions and model predictions. Future climate scenarios predict a reduction in Tityus serrulatus habitat suitability. Despite this reduction, models indicate an increase in high-suitability areas, suggesting a possible local expansion in optimal habitats. Conversely, T. metuendus, T. obscurus, and T. silvestris are expected to undergo a significant increase in habitat suitability, potentially expanding into previously unsuitable areas due to temperature and precipitation shifts. Tityus stigmurus is also projected to benefit from climate change with an increase in suitable habitats, although its expansion is more restricted compared to the other species. In contrast, T. bahiensis and T. trivittatus are expected to face a reduction in habitat suitability. These findings highlight that climate-driven habitat reduction may concentrate scorpion populations in densely populated areas, exacerbating public health risks. Therefore, targeted governmental interventions are crucial to mitigate the escalating threat posed by Tityus scorpions in urban settings under climate change scenarios.
Freitas Barroso, R. D., Cardoso, V. L., Alves, A. G., Lira, A. F. D. A., Ferreira, R. G., Costa, L. F., & Tizo-Pedroso, E. (2025). Climate Change Increases Public Health Risks from Tityus Scorpion Stings in Brazil. Toxicon, 108326. https://doi.org/10.1016/j.toxicon.2025.108326