Hermaeidae is a taxonomic family

Family (biology)

In biological classification, family is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus. As for the other well-known ranks, there is the option of an immediately lower rank, indicated by the...

 of sacoglossa

Sacoglossa

Sacoglossa, commonly known as the sacoglossans or the "sap-sucking sea slugs", are a clade of small sea slugs and sea snails, marine gastropod mollusks that belong to the clade Heterobranchia...

n sea slug

Slug

Slug is a common name that is normally applied to any gastropod mollusc that lacks a shell, has a very reduced shell, or has a small internal shell...

s. These are marine

Marine (ocean)

Marine is an umbrella term. As an adjective it is usually applicable to things relating to the sea or ocean, such as marine biology, marine ecology and marine geology...

 opisthobranch gastropod mollusks in the superfamily Limapontioidea

Limapontioidea

Limapontioidea are a superfamily of sea slugs, marine gastropod mollusks within the clade Sacoglossa.-Families:Families within the superfamily Limapontioidea include:*Family Limapontiidae*Family Caliphyllidae*Family Hermaeidae...

.

This family has no subfamilies.

Genera

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

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

• genus Aplysiopsis
  Aplysiopsis
  Aplysiopsis is a genus of sacoglossan sea slugs, a shell-less marine opisthobranch gastropod mollusks in the family Hermaeidae.- Species :Species within the genus Aplysiopsis include 9 valid species:* Aplysiopsis brattstroemi...
  
  Deshayes, 1839-53
• genus Hermaea
  Hermaea (gastropod)
  Hermaea is a genus of sacoglossan sea slugs, a shell-less marine opisthobranch gastropod mollusks in the family Hermaeidae.Hermaea is the type genus of the family Hermaeidae.- Species :...
  
  Lovèn, 1844 - type genus

Other invalid species within family Hermaeidae include:

• Physopneumon carneum A. Costa, 1862