Plakobranchoidea

Plakobranchoidea form a superfamily of small and medium-sized nudibranches with no internal shell within the superorder Sacoglossa.

The current taxonomy according to Bouchet et al. (2017) and accepted by WoRMS is:

Plakobranchoidea J. E. Gray, 1840

Caliphyllidae Tiberi, 1881
- Caliphylla A. Costa, 1867
- Cyerce Bergh, 1870
- Mourgona Er. Marcus & Ev. Marcus, 1970
- Polybranchia Pease, 1860
- Sohgenia Hamatani, 1991
Costasiellidae K. B. Clark, 1984
- Costasiella Pruvot-Fol, 1951
- Panderevela Moro & Ortea, 2015
Hermaeidae H. Adams & A. Adams, 1854
- Aplysiopsis Deshayes, 1853
- Hermaea Lovén, 1844
Limapontiidae Gray, 1847
- Alderella Odhner, 1968
- Alderia Allman, 1845
- Alderiopsis Baba, 1968
- Calliopaea A. d’Orbigny, 1837
- Ercolania Trinchese, 1872
- Kerryclarkella K. R. Jensen, 2015
- Limapontia G. Johnston, 1836
- Olea Agersborg, 1923
- Placida Trinchese, 1876
- Sacoproteus Krug, Wong, M. R. Medina, Gosliner & Á. Valdés, 2018
- Stiliger Ehrenberg, 1828
- Swennenia Buatip & S. K. Tan, 2020
Plakobranchidae J. E. Gray, 1840
- Bosellia Trinchese, 1891
- Elysia Risso, 1818
- Plakobranchus van Hasselt, 1824
- Thuridilla Bergh, 1872