DNA sequence data been deposited in the European Nucleotide Archive (ENA, https://www.ebi.ac.uk/ena/) under study number PRJEB70441 (https://www.ebi.ac.uk/ena/browser/view/PRJEB70441) and accession numbers OY805160 (ITS) and OY805161 (atpB-rbcL).

A species belonging to the genus Sagina, that has been known since at least 2016 from several localities in the city of Bassano del Grappa (Veneto region, northeastern Italy), was identified as S. maxima. It is a species from (predominantly) coastal areas in western North America and Far Eastern Asia. Morphological and molecular data confirmed this identification, although this finding raises some questions about the ecology and morphology of S. maxima and some of its relatives and/or similar-looking species. These records appear to be the first in Europe. A concise morphological description and illustrations are provided along with a comparison with related and similar-looking Sagina species. The status of S. maxima in Italy is also briefly discussed and a key for the identification of the Italian species from the genus is presented.