Barkeriella museensis, a two-centimeter snail belonging to a family of terrestrial molluscs known as the Rathouisiidae, was discovered and identified for the first time in the tropical greenhouse of the MUSE - Science Museum of Trento, during some scientific sampling. The discovery, described in the scientific journal "Zoological Journal of the Linnean Society" and now also in a MUSE video, opens up new avenues for research on alien species. Barkeriella museensis is named after the New Zealand malacologist Gary Barker and the MUSE of Trento, where it was discovered. Its range of origin is unknown in nature, but it could be in East Asia or Australia because the family to which it belongs is widespread in those regions. Moreover, the snail's arrival in Trentino's capital is also unknown: it was most likely transported with soil or exotic plants from the museum's tropical greenhouse. The discovery was made as part of an alien species research project led by the University of Siena and the Natural History Museum Academy of Fisiocritici in collaboration with the University of Poznań, Poland, and the National Biodiversity Future Center (NBFC) within the NRRP. The project is led by Giuseppe Manganelli and Folco Giusti of the University of Siena, two of Italy's few researchers who specialize in terrestrial mollusks.