The new Checklist of the Italian Fauna: Cladocera (Branchiopoda: Ctenopoda, Anomopoda, Onychopoda, and Haplopoda)

encompassing the orders Ctenopoda, Anomopoda, Onychopoda, and Haplopoda. The checklist contains 121 species belonging to 13 families, with Chydoridae and Daphniidae being the most abundant. Seven freshwater species have been added since the previous checklist, while the number of marine species remained unchanged at six. Following recent taxonomic revisions, changes in the nomenclature have been introduced, primarily within the subfamily Aloninae. None of the species is endemic to Italy, but six are considered alien. The presence of species in each macroregion and administrative region is reported, with the number of species per region ranging from 10 in Molise to 77 in Lombardy administrative regions. A total of 165 new regional citations are recorded, with southern regions showing increases exceeding 40% of their total records with respect to the previously reported ones in the CKmap database published in 2005. Although the total number of Italian cladoceran species is well known, their taxonomy is still evolving, particularly within Aloninae and Daphniinae. Molecular studies are expected to reveal cryptic species and refine biogeographic patterns.