Plakobranchidae is a

family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

sea slugs Sea slug is a common name for some marine invertebrates with varying levels of resemblance to terrestrial slugs. Most creatures known as sea slugs are gastropods, i.e. they are sea snails (marine gastropod mollusks) that, over evolutionary t ...

, marine

opisthobranch Opisthobranchs () is a now informal name for a large and diverse group of specialized complex gastropods which used to be united in the subclass Opisthobranchia. That taxon is no longer considered to represent a monophyletic grouping. Euopistho ...

gastropod Gastropods (), commonly known as slugs and snails, belong to a large Taxonomy (biology), taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, freshwater, and fro ...

mollusk Mollusca is a phylum of protostomic invertebrate animals, whose members are known as molluscs or mollusks (). Around 76,000 extant species of molluscs are recognized, making it the second-largest animal phylum after Arthropoda. The ...

s in the superfamily

Plakobranchoidea Plakobranchoidea is a taxonomic superfamily of sea slugs, marine gastropod mollusks within the superorder Sacoglossa Sacoglossa are a superorder of small sea slugs and sea snails, marine gastropod mollusks that belong to the clade Heterobra ...

. They superficially resemble

nudibranch Nudibranchs () are a group of soft-bodied marine gastropod molluscs, belonging to the order Nudibranchia, that shed their shells after their larval stage. They are noted for their often extraordinary colours and striking forms, and they have b ...

s but they are sacoglossans, members of the

clade In biology, a clade (), also known as a Monophyly, monophyletic group or natural group, is a group of organisms that is composed of a common ancestor and all of its descendants. Clades are the fundamental unit of cladistics, a modern approach t ...

Sacoglossa Sacoglossa are a superorder of small sea slugs and sea snails, marine gastropod mollusks that belong to the clade Heterobranchia known as sacoglossans. There are 284 valid species recognized within this superorder. Sacoglossans live by ingestin ...

within the

Opisthobranchia Opisthobranchs () is a now informal name for a large and diverse group of specialized complex gastropods which used to be united in the subclass Opisthobranchia. That taxon is no longer considered to represent a monophyletic grouping. Euopisth ...

Taxonomy

Elysiidae was originally described as "Elysiadae" by Forbes & Hanley in 1851 in the book ''A history of British Mollusca and their Shells'' 3:613. In the taxonomy of Bouchet & Rocroi (2005), the family Elysiidae is considered to be a synonym of the family Plakobranchidae Gray, 1840. The original spelling Placobranchidae, based on ''Placobranchus'', an incorrect subsequent spelling by Férussac (1824) in a translation of van Hasselt's work. Franc (1968: 848) and Jensen (1996: 92) attributed the name to Rang, 1829 (p. 134), who used the vernacular "les Placobranches". Jensen (1997: 180-181) argued for the restoration of the spelling Plakobranchidae, and she has been followed by Wägele & Willan (2000: 91). Bouchet & Rocroi (2005: 133), argued that the spellings ''Placobranchus'' and Placobranchidae were in prevailing usage and were conserved under Art. 33.3.1. This view has been challenged by R. Burn and the spelling Plakobranchidae is now preferred. This family has no subfamilies.

Genera

Genera in the family Plakobranchidae are: * '' Bosellia'' Trinchese, 1891 * '' Elysia'' Risso, 1818 * ''

Plakobranchus ''Plakobranchus'' is a genus of sea slugs, sacoglossans, marine opisthobranch gastropod mollusks in the family Plakobranchidae.Gofas, S. (2012)''Plakobranchus'' van Hasselt, 1824.Accessed through: World Register of Marine Species on 2012-03-08 ...

'' van Hasselt, 1824 – type genus * ''

Thuridilla ''Thuridilla'' is a genus of sacoglossan sea slugs, shell-less marine opisthobranch gastropod mollusks in the family Plakobranchidae.Bouchet, P.; Gofas, S. (2012). Thuridilla Bergh, 1872. Accessed through: World Register of Marine Species at ht ...

'' Bergh, 1872 Image:Elysia timida (Risso, 1818) cropped.jpg, ''

Elysia timida ''Elysia timida'' is a species of sacoglossan sea slug, a marine opisthobranch gastropod mollusk. Found in the Mediterranean and nearby parts of the Atlantic, it is herbivorous, feeding on various algae in shallow water. Description ''Elysia ti ...

'' Image:Placobranchus ocellatus001.jpg, ''

Plakobranchus ocellatus ''Plakobranchus ocellatus'' is a species of sea slug, a sacoglossan, a marine (ocean), marine opisthobranch gastropod mollusk in the family (biology), family Plakobranchidae.Gofas, S. (2014)''Plakobranchus ocellatus'' van Hasselt, 1824.Accessed t ...

'' Image:Thuridilla decorata.jpg, ''

Thuridilla decorata ''Thuridilla decorata'' is a species of sacoglossan sea slug, a shell-less marine opisthobranch gastropod mollusk in the family Plakobranchidae. Distribution This species occurs in both the Gulf of Oman and the Red Sea The Red Sea is ...

'' Image:Thuridilla hopei (Vérany, 1853) sur Codium fragile (Suringar) Hariot, 1889.jpg, ''

Thuridilla hopei ''Thuridilla hopei'' is a species of sacoglossan sea slug, a shell-less Marine life, marine opisthobranch gastropod mollusks in the family Plakobranchidae.Gofas, S. (2010). Thuridilla hopei (Vérany, 1853). In: Bouchet, P.; Gofas, S.; Rosenberg, ...

'' Image:Thuridilla moebii.JPG, ''

Thuridilla moebii ''Thuridilla moebii'' is a species of sacoglossan sea slug, a shell-less marine opisthobranch gastropod mollusc in the family Plakobranchidae. It is found in shallow water in the tropical west and central Indo-Pacific region. Description ''Thur ...

References

{{Taxonbar, from=Q148535 Gastropod families Taxa named by John Edward Gray