title: Hermaeidae
text: # 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
  