''Placida'' is a
genus
Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...
of very small or minute
sea slug
Sea slug is a common name for some Marine biology, marine invertebrates with varying levels of resemblance to terrestrial Slug, slugs. Most creatures known as sea slugs are gastropods, i.e. they are Sea snail, sea snails (marine gastropod moll ...
s,
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
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 ...
Limapontiidae
Limapontiidae is a taxonomic family of small to minute sacoglossan sea slugs. These are marine opisthobranch gastropod mollusks.Bouchet, P.; Gofas, S. (2011). Limapontiidae. Accessed through: World Register of Marine Species at http://www.marin ...
.
[WoRMS : Placida](_blank)
accessed : 13 October 2010]
Although similar in appearance to
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, species in this genus are actually
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 ...
ns.
Species
Species within this genus include:
* ''
Placida aoteana''
(Powell, 1937)
* ''
Placida babai''
Ev. Marcus, 1982
* ''
Placida barackobamai''
McCarthy, Krug & Valdés, 2017
* ''
Placida brevirhina''
(Trinchese, 1874)
* ''
Placida brookae''
McCarthy, Krug & Valdés, 2017
* ''
Placida cremoniana''
(Trinchese, 1892)
* ''
Placida dakariensis''
(Pruvot-Fol, 1953)
* ''
Placida dendritica''
(Alder and Hancock, 1843)
* ''
Placida fralila''
Burn, 1966
* ''
Placida kevinleei''
McCarthy, Krug & Valdés, 2017
* ''
Placida kingstoni''
T. E. Thompson, 1977
* ''
Placida saronica''
(T.E. Thompson, 1988)
* ''
Placida sudamericana''
Cetra, Gutiérrez Gregoric & Roche, 2021
* ''
Placida tardyi''
(Trinchese, 1873)
* ''
Placida verticillata''
Ortea, 1981
* ''
Placida viridis''
(Trinchese, 1873)
;Synonyms:
* ''Placida brevicornis''
(A. Costa, 1867): synonym of ''
Placida dendritica''
(Alder & Hancock, 1843)
; Taxa inquirenda:
* ''
Placida capensis''
Macnae, 1954
* ''
Placida daguilarensis''
Jensen, 1990 (taxon inquirendum)
References
*
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.
External links
Anonymous. (1873). 19ª Sessione ordinaria, 3 aprile 1873 (preliminary presentation of Trinchese's Memoir to be published in 1874, making some names available). Rendiconto delle sessioni della R. Accademia delle scienze dell'Istituto di Bologna, Classe di scienze fisiche. 1872-1873: 133-134
Limapontiidae
{{Limapontiidae-stub