Petitia

The genus name Petitia may refer to:

Animalia:
- Petitia Chitty, 1857 (Gastropoda, Helicinidae) = synonym of Fadyenia Chitty, 1857
- Petitia Jousseaume, 1884, junior homonym (Gastropoda, Achatinidae) = synonym of Leptocala Ancey, 1888
- Petitia Siewing, 1956, junior homonym (Annelida : Syllidae) = synonym of Neopetitia San Martín, 2003

Plantae:
- Petitia Jacq. (1760) (Lamiales, Lamiaceae)
- Petitia Neck. (1790), nom. inval. opus utique oppr. = synonym of Hibiscus L. (Malvales, Malvaceae)
- Petitia J.Gay, (1829), nom. illeg. = synonym of Xatardia Meisn. & Zeyh. (Apiales, Apiaceae)

Chromista:
- Petitia M.Peragallo, 1909, nom. illeg. (Ochrophyta, Bacillariophyceae) = synonym of Halopetitia S.Blanco & C.E.Wetzel, 2016

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