''Philiopsis'' 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 often colorful, medium-sized

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 ...

marine Marine is an adjective meaning of or pertaining to the sea or ocean. Marine or marines may refer to: Ocean * Maritime (disambiguation) * Marine art * Marine biology * Marine current power * Marine debris * Marine energy * Marine habitats * Mari ...

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. These are not

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; instead they are headshield slugs, in 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 ...

Cephalaspidea The order Cephalaspidea, also known as the headshield slugs and bubble snails, is a major taxon of sea slugs and bubble snails, marine (ocean), marine gastropod mollusks within the larger clade Euopisthobranchia. Bubble shells is another commo ...

Description

(Original description) Animal: The head disk is large, oblong-oval to triangular in shape, and does not extend beyond the foot. Behind the head disk, the body forms a convex, fleshy lobe that begins beneath the overlapping head disk and extends to or just past the posterior portion of the foot. This lobe is truncated at the rear, with the truncation bordered by an undulated or crenated crest. Eyes are not visible. The mouth is proboscidiform, positioned between the cephalic disk and foot, and may have a pair of tentacles on either side. The foot is large, rounded, and reflected at the sides. A branchial plume is located near the posterior end of the body, curving around near the truncated end of the foot. The shell is concealed within this truncated end.

Species

Recognized species within the genus ''Philinopsis'' are:

Synonyms

* ''Philinopsis aeci'' Ortea & Espinosa, 2001: synonym of '' Spinoaglaja aeci'' (Ortea & Espinosa, 2001) (original combination) * ''Philinopsis anneae'' Ornelas-Gatdula & Á. Valdés, 2012: synonym of '' Spinoaglaja petra'' (Ev. Marcus, 1976) * ''Philinopsis coronata'' Gosliner, 2011: synonym of '' Spinophallus coronatus'' (Gosliner, 2011) (original combination) * ''Philinopsis cyanea'' (E. von Martens, 1879): synonym of ''

Philinopsis speciosa ''Philinopsis speciosa'', the blue-lined philinopsis, is a species of sea slug, a shell-less Opisthobranchia, opisthobranch Gastropoda, gastropod Mollusca, mollusc in the family Aglajidae. It is native to the Indo-Pacific region. Description ...

'' Pease, 1860 * ''Philinopsis falciphallus'' Gosliner, 2011: synonym of '' Spinophallus falciphallus'' (Gosliner, 2011) * ''Philinopsis gardineri'' (Eliot, 1903): synonym of '' Tubulophilinopsis gardineri'' (Eliot, 1903) * ''Philinopsis lineolata'' (H. Adams & A. Adams, 1854): synonym of '' Tubulophilinopsis lineolata'' (H. Adams & A. Adams, 1854) (superseded combination) * ''Philinopsis miqueli'' Pelorce, Horst & Hoarau, 2013: synonym of '' Melanochlamys miqueli'' (Pelorce, Horst & Hoarau, 2013) (original combination) * ''Philinopsis nigra'' Pease, 1860: synonym of Philinopsis pilsbryi (Eliot, 1900): synonym of '' Tubulophilinopsis pilsbryi'' (Eliot, 1900) (potentially

nomen oblitum In zoological nomenclature, a ''nomen oblitum'' (plural: ''nomina oblita''; Latin for "forgotten name") is a disused scientific name which has been declared to be obsolete (figuratively "forgotten") in favor of another "protected" name. In its pr ...

) * ''Philinopsis orientalis'' (Baba, 1949): synonym of '' Spinoaglaja orientalis'' (Baba, 1949) * ''Philinopsis petra'' (Ev. Marcus, 1976): synonym of '' Spinoaglaja petra'' (Ev. Marcus, 1976) * ''Philinopsis pilsbryi'' (Eliot, 1900): synonym of '' Tubulophilinopsis pilsbryi'' (Eliot, 1900) * ''Philinopsis reticulata'' (Eliot, 1903): synonym of ''

Tubulophilinopsis reticulata ''Tubulophilinopsis'' is a genus of medium-sized, sea slugs from the Indo-West Pacific belonging to the family Aglajidae. MolluscaBase eds. (2021). MolluscaBase. Tubulophilinopsis Zamora-Silva & Malaquias, 2017. Accessed through: World Register o ...

'' (Eliot, 1903) * ''Philinopsis taronga'' (J. K. Allan, 1933): synonym of ''

Philinopsis gigliolii ''Philinopsis gigliolii'' is a species of small and colorful aglajid sea slug, a shell-less opisthobranch gastropod mollusk in the family Aglajidae. Distribution It has an Indo-Pacific The Indo-Pacific is a vast biogeographic region of ...

'' (Tapparone Canefri, 1874) (junior subjective synonym)

Description

Species

Synonyms

References

Further reading