2025. COMBINED EFFECTS OF POLYSTYRENE MICROPLASTICS, NANOPLASTICS, AND MERCURY ON THE GILL STRUCTURE AND FUNCTION OF MYTILUS GALLOPROVINCIALIS: Rossana ROMANO1,2, Maria D. BORDALO3, Hugo C. VIEIRA3, Sílvia FS. PIRES3, Federica DI FRANCO1, Chiara M. MOTTA4, Palma SIMONIELLO1,2 | 1Department of Science and Technology, University Parthenope, Napoli, Italy; 2International PhD Programme, UNESCO Chair “Environment, Resources and Sustainable Development”, Department of Science and Technology, Parthenope University of Naples, Naples, Italy; 3CESAM—Centre for Environmental and Marine Studies, Department of Biology, University of Aveiro, Aveiro, Portugal; 4Department of Biology, University of Naples Federico II, Napoli, Italy. Journal of Biological Research - Bollettino della Società Italiana di Biologia Sperimentale. 98, s2 (Oct. 2025). DOI:https://doi.org/10.4081/jbr.2025.14547.