Marquise Marianna Panciatichi Ximenes d’Aragona Paulucci (February 3, 1835 – December 7, 1919) was an Italian malacologist who also made contributions to botany and ornithology. A specialist in non-marine molluscs, she published 32 malacological works, describing two genera and 159 species, and is commemorated in around 40 scientific names of organisms: primarily molluscs, as well as the fossil shark Scyllium pauluccii and the bird subspecies Sylvia atricapilla pauluccii.