Hermaeidae
# Hermaeidae

Hermaeidae is a taxonomic family of sacoglossan sea slugs. These are marine opisthobranch gastropod mollusks in the superfamily Plakobranchoidea.

This family has no subfamilies.

## Genera

Jensen (1996) listed three genera Aplysiopsis, Hermaea and Hermaeopsis A. Costa, 1869, which has been synonymized with * Hermaea.

Jensen (2007) listed two valid genera in the family Hermaeidae:

* Aplysiopsis Deshayes, 1839–53
* Caliphylla A. Costa, 1867
* Cyerce Bergh, 1870
* Hermaea Lovèn, 1844 - type *
* Mourgona Er. Marcus & Ev. Marcus, 1970
* Polybranchia Pease, 1860
* Sohgenia Hamatani, 1991

### Genera brought into synonymy

* Beccaria Trinchese, 1870: synonym of Caliphylla A. Costa, 1867
* Branchophyllum Pruvot-Fol, 1947: synonym of Polybranchia Pease, 1860 (invalid: junior objective synonym of Phyllobranchillus, an earlier replacement name by the same author for the same homonym.)
* Hermaeina Trinchese, 1874: synonym of Aplysiopsis Deshayes, 1853
* Hermaeopsis A. Costa, 1869: synonym of Hermaea Lovén, 1844
* Jenseneria Ortea & Moro, 2015: synonym of Mourgona Er. Marcus & Ev. Marcus, 1970
* Lobiancoia Trinchese, 1881: synonym of Cyerce Bergh, 1870
* Lobifera Pease, 1866: synonym of Polybranchia Pease, 1860 (Unnecessary substitute name for Polybranchia Pease, 1860)
* Phyllobranchillus Pruvot-Fol, 1933: synonym of Polybranchia Pease, 1860
* Phyllobranchopsis Eliot, 1905: synonym of Aplysiopsis Bergh, 1898: synonym of Aplysia Linnaeus, 1767
* Phyllobranchus Alder & Hancock, 1864: synonym of Polybranchia Pease, 1860 (Invalid: junior homonym of Phyllobranchus Girard, 1851 [Annelida]; Phyllobranchillus and Branchophyllum are replacement names)
* Physopneumon A. Costa, 1864: synonym of Hermaea Lovén, 1844
* Polybranchea: synonym of Polybranchia Pease, 1860
* Polybranchus: synonym of Polybranchia Pease, 1860

Other invalid species within family Hermaeidae include:

* Physopneumon carneum A. Costa, 1862
