Ferri, V. et al. 2021. [First occurrence of Sea Lamprey, <em>Petromyzon marinus</em> Linnaeus 1758 (Agnatha, Petromyzontiformes, Petromyzontidae) in the River Mignone (Northern Lazio).]. Natural History Sciences. 8, 1 (May 2021), 29–34. DOI:https://doi.org/10.4081/nhs.2021.510.