genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nom ...
of very small or minute
sea slug
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 time ...
mollusk
Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is e ...
s in the
family
Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. Idea ...
Limapontiidae
Limapontiidae is a Taxonomy (biology), taxonomic family (biology), family of small to minute sacoglossan sea slugs. These are marine (ocean), marine opisthobranch gastropod mollusks.Bouchet, P.; Gofas, S. (2011). Limapontiidae. Accessed through: ...
.WoRMS : Placida accessed : 13 October 2010]
Although similar in appearance to
nudibranch
Nudibranchs () are a group of soft-bodied marine gastropod molluscs which shed their shells after their larval stage. They are noted for their often extraordinary colours and striking forms, and they have been given colourful nicknames to match, ...
s, species in this genus are actually
Sacoglossa
Sacoglossa, commonly known as the sacoglossans or the "solar-powered sea slugs", are a superorder of small sea slugs and sea snails, marine gastropod mollusks that belong to the clade Heterobranchia. Sacoglossans live by ingesting the cellular co ...
ns.
Species
Species within this genus include:
* '' Placida aoteana'' (Powell, 1937)
* '' Placida babai'' Ev. Marcus, 1982
* ''
Placida barackobamai
''Placida'' is a genus of very small or minute sea slugs, marine opisthobranch gastropod mollusks in the family Limapontiidae.Placida brevirhina
''Placida'' is a genus of very small or minute sea slugs, marine opisthobranch gastropod mollusks in the family Limapontiidae.Placida brookae'' McCarthy, Krug & Valdés, 2017
* ''
Placida cremoniana
''Placida'' is a genus of very small or minute sea slugs, marine opisthobranch gastropod mollusks in the family Limapontiidae.Placida dakariensis'' (Pruvot-Fol, 1953)
* '' Placida dendritica'' (Alder and Hancock, 1843)
* '' Placida fralila'' Burn, 1966
* '' Placida kevinleei'' McCarthy, Krug & Valdés, 2017
* ''
Placida kingstoni
''Placida'' is a genus of very small or minute sea slugs, marine opisthobranch gastropod mollusks in the family Limapontiidae.Placida saronica
''Placida'' is a genus of very small or minute sea slugs, marine opisthobranch gastropod mollusks in the family Limapontiidae.Placida sudamericana
''Placida'' is a genus of very small or minute sea slugs, marine opisthobranch gastropod mollusks in the family Limapontiidae.Placida tardyi
''Placida'' is a genus of very small or minute sea slugs, marine opisthobranch gastropod mollusks in the family Limapontiidae.Placida verticillata
''Placida'' is a genus of very small or minute sea slugs, marine opisthobranch gastropod mollusks in the family Limapontiidae.Placida viridis
''Placida'' is a genus of very small or minute sea slugs, marine opisthobranch gastropod mollusks in the family Limapontiidae.Placida dendritica'' (Alder & Hancock, 1843)
; Taxa inquirenda:
* ''
Placida capensis
''Placida'' is a genus of very small or minute sea slugs, marine opisthobranch gastropod mollusks in the family Limapontiidae.Placida daguilarensis
''Placida'' is a genus of very small or minute sea slugs, marine opisthobranch gastropod mollusks in the family Limapontiidae.Powell A. W. B., ''New Zealand Mollusca'', William Collins Publishers Ltd, Auckland, New Zealand 1979
*
* Jensen K.E. (2007) ''Biogeography of the Sacoglossa (Mollusca, Opisthobranchia).'' Bonner Zoologische Beiträge 55:255–281.