Lombardo, A. and Marletta, G. 2023. No longer so common: findings of <em>Calliopaea bellula</em> d’Orbigny 1837 (Gastropoda: Sacoglossa) and <em>Tayuva lilacina</em> (A. Gould 1852) (Gastropoda: Nudibranchia) along the central-eastern coast of Sicily (Ionian Sea). Natural History Sciences. 10, 1 (Apr. 2023). DOI:https://doi.org/10.4081/nhs.2023.632.