Cliopsidae
Encyclopedia
Cliopsidae, common name
Common name
A common name of a taxon or organism is a name in general use within a community; it is often contrasted with the scientific name for the same organism...

 sea angels, are 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 small free-swimming 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, pelagic 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 order
Order (biology)
In scientific classification used in biology, the order is# a taxonomic rank used in the classification of organisms. Other well-known ranks are life, domain, kingdom, phylum, class, family, genus, and species, with order fitting in between class and family...

 Opisthobranchia
Opisthobranchia
Opisthobranchs are a large and diverse group of specialized complex marine gastropods previously united under Opisthobranchia within the Heterobranchia, but no longer considered to represent a monophyletic grouping...

.

As is the case in all gymnosome pteropods, these sea angels lack a shell except during an early embryo
Embryo
An embryo is a multicellular diploid eukaryote in its earliest stage of development, from the time of first cell division until birth, hatching, or germination...

nic stage.

The small lateral winglike flaps (parapoda) are used in a slow swimming mode. The foot is reduced to three small median lobes.

A more comprehensive discussion can be found under the entry sea angel
Sea angel
Sea angels previously known as one kind of pteropod, are a large group of small swimming sea slugs in six different families. These are pelagic marine opisthobranch gastropod molluscs in the clade Gymnosomata within the larger clade Heterobranchia....

.

Genera and species

Genera and species within the family Cliopsidae include:

Genus Cliopsis Troschel, 1854
  • Cliopsis krohnii
    Cliopsis krohnii
    Cliopsis krohnii Troschel, 1854. is the only species in Cliopsis, a genus of sea angels belonging to the family Cliopsidae.The Marine Species Identification Portal recognizes three morphs :...

    Troschel, 1854


Genus Pruvotella
  • Pruvotella danae Pruvot-Fol
    Alice Pruvot-Fol
    Alice Pruvot-Fol was a French opisthobranch malacologist.She was the author of many new species, mostly described on the basis of preserved animals....

    , 1942
    • Distribution : Bermuda
      Bermuda
      Bermuda is a British overseas territory in the North Atlantic Ocean. Located off the east coast of the United States, its nearest landmass is Cape Hatteras, North Carolina, about to the west-northwest. It is about south of Halifax, Nova Scotia, Canada, and northeast of Miami, Florida...

      , Oceanic
    • Length : 10 mm
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