Thordisa pallida

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Thordisa pallida
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
(unranked):clade Heterobranchia
clade Euthyneura
clade Nudipleura
clade Nudibranchia
clade Euctenidiacea
clade Doridacea
Superfamily: Doridoidea
Family: Discodorididae
Genus: Thordisa
Species:T. pallida
Binomial name
Thordisa pallida
Bergh, 1884 [1]

Thordisa pallida is a species of sea slug, a dorid nudibranch, shell-less marine opisthobranch gastropod molluscs in the family Discodorididae. [2]

In biology, a species ( ) is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. Other ways of defining species include their karyotype, DNA sequence, morphology, behaviour or ecological niche. In addition, paleontologists use the concept of the chronospecies since fossil reproduction cannot be examined. While these definitions may seem adequate, when looked at more closely they represent problematic species concepts. For example, the boundaries between closely related species become unclear with hybridisation, in a species complex of hundreds of similar microspecies, and in a ring species. Also, among organisms that reproduce only asexually, the concept of a reproductive species breaks down, and each clone is potentially a microspecies.

Sea slug group of marine invertebrates with varying levels of resemblance to terrestrial 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 actually gastropods, i.e. they are sea snails that over evolutionary time have either completely lost their shells, or have seemingly lost their shells due to having a greatly reduced or internal shell. The name "sea slug" is most often applied to nudibranchs, as well as to a paraphyletic set of other marine gastropods without obvious shells.

Nudibranch order of molluscs

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, such as "clown", "marigold", "splendid", "dancer", and "dragon". Currently, about 3,000 valid species of nudibranchs are known.

Related Research Articles

Dorididae family of molluscs

Sea lemon is a loosely applied common name for a group of medium-sized to large shell-less colorful sea slugs or nudibranchs, specifically dorid nudibranchs in the taxonomic family Dorididae and other closely related families. These are marine gastropod mollusks.

Doridoidea superfamily of molluscs

Doridoidea, commonly known as dorid nudibranchs, are a taxonomic superfamily of medium to large, shell-less sea slugs, marine gastropod mollusks in the clade Doridacea, included in the clade Nudibranchia.

<i>Tritonia</i> (gastropod) genus of molluscs

Tritonia is a genus of sea slugs, nudibranchs, shell-less marine gastropod molluscs in the family Tritoniidae.

Rudolph Bergh Danish physician and malacologist

Rudolph Bergh, full name Ludvig Sophus Rudolph Bergh, was a Danish physician and malacologist. He worked in Copenhagen.

Discodorididae family of molluscs

Discodorididae is a taxonomic family of sea slugs, specifically dorid nudibranchs, marine gastropod mollusks in the superfamily Doridoidea.

<i>Discodoris</i> genus of molluscs

Discodoris is a genus of sea slugs, dorid nudibranchs, shell-less marine gastropod molluscs in the family Discodorididae.

Baptodoris is a genus of sea slugs, dorid nudibranchs, shell-less marine gastropod mollusks in the family Discodorididae.

Thordisa is a genus of sea slugs, dorid nudibranchs, shell-less marine gastropod mollusks in the family Discodorididae.

<i>Chromodoris striatella</i> species of mollusc

Chromodoris striatella is a species of colourful sea slug, a dorid nudibranch, a marine gastropod mollusc in the family Chromodorididae.

Alloiodoris marmorata is a species of sea slug or dorid nudibranch, a marine gastropod mollusk in the family Discodorididae.

<i>Doris ocelligera</i> species of mollusc

Doris ocelligera is a species of sea slug, a dorid nudibranch, a marine gastropod mollusk in the family Dorididae.

Baptodoris cinnabarina is a species of sea slug or dorid nudibranch, a marine gastropod mollusk in the family Discodorididae. The original description was revised in 1999.

Coryphella californica is a species of sea slug, an aeolid nudibranch, a marine gastropod mollusc in the family Flabellinidae.

Acanthodoris metulifera is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusc in the family Onchidorididae.

Thordisa aculeata is a species of sea slug, a dorid nudibranch, shell-less marine opisthobranch gastropod molluscs in the family Discodorididae.

Thordisa hilaris is a species of sea slug, a dorid nudibranch, shell-less marine opisthobranch gastropod molluscs in the family Discodorididae.

Phyllidiella striata is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusk in the family Phyllidiidae.

Doris bicolor is a species of sea slug, a dorid nudibranch, a marine gastropod mollusk in the family Dorididae.

Doris januarii is a species of sea slug, a dorid nudibranch, a marine gastropod mollusk in the family Dorididae.

References

  1. Bergh, L. S. R. 1884. Malacologische Untersuchungen. In: Reisen im Archipel der Philippinen von Dr. Carl Gottfried Semper. Zweiter Theil. Wissenschaftliche Resultate. Band 2, Theil 3, Heft 15, pp 647- 754, pls. 69-76.
  2. Gofas, S. (2004). Thordisa pallida Bergh, 1884. In: MolluscaBase (2016). Accessed through: World Register of Marine Species on 2016-05-12