Family Polybranchiidae
 
Polybranchia Pease, 1860
 
  Polybranchia borgninii (Trinchese, 1888) (3, 5)
 
Caliphylla A. Costa, 1867
 
  Caliphylla mediterranea A. Costa, 1867
 
Cyerce Bergh, 1871
 
  Cyerce cristallina (Trinchese, 1881) (3, 5)
  Cyerce graeca Thompson, 1988 (5)
 
Aplysiopsis Deshayes, 1864
 
  Aplysiopsis elegans Deshayes, 1853 (3, 5)
 
Costasiella Pruvot-Fol, 1951
 
  Costasiella virescens Pruvot-Fol, 1951 (3)
 
Hermaea Loven, 1844
 
  Hermaea bifida (Montagu, 1815) (3)
  Hermaea saronica Thompson, 1988 (5)
 
Hermaeopsis A. Costa, 1869
 
  Hermaeopsis variopicta A. Costa, 1869 (3, 5)

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