Onchidoris slavi

Onchidoris slavi
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
(unranked):	clade Heterobranchia ; clade Euthyneura ; clade Nudipleura ; clade Nudibranchia ; clade Euctenidiacea ; clade Doridacea
Superfamily:	Onchidoridoidea
Family:	Onchidorididae
Genus:	Onchidoris
Species:	O. slavi
Binomial name
	Onchidoris slavi; (Martynov, Korshunova, Sanamyan & Sanamyan, 2009) [1]
Synonyms [2]
	Adalaria slaviMartynov, Korshunova, Sanamyan & Sanamyan, 2009 ;

Last updated April 29, 2019

Onchidoris slavi is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusc in the family Onchidorididae.^[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 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.

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.

Distribution

This species was described from Starichkov Island, Kamchatka Peninsula on the Pacific Ocean coast of Russia.^[1]

The Kamchatka Peninsula is a 1,250-kilometre-long (780 mi) peninsula in the Russian Far East, with an area of about 270,000 km². The Pacific Ocean and the Sea of Okhotsk make up the peninsula's eastern and western coastlines, respectively. Immediately offshore along the Pacific coast of the peninsula runs the 10,500-metre (34,400-ft) deep Kuril–Kamchatka Trench.

The Pacific Ocean is the largest and deepest of Earth's oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean in the south and is bounded by Asia and Australia in the west and the Americas in the east.

Russia, officially the Russian Federation, is a transcontinental country in Eastern Europe and North Asia. At 17,125,200 square kilometres (6,612,100 sq mi), Russia is by a considerable margin the largest country in the world by area, covering more than one-eighth of the Earth's inhabited land area, and the ninth most populous, with about 146.77 million people as of 2019, including Crimea. About 77% of the population live in the western, European part of the country. Russia's capital, Moscow, is one of the largest cities in the world and the second largest city in Europe; other major cities include Saint Petersburg, Novosibirsk, Yekaterinburg and Nizhny Novgorod. Extending across the entirety of Northern Asia and much of Eastern Europe, Russia spans eleven time zones and incorporates a wide range of environments and landforms. From northwest to southeast, Russia shares land borders with Norway, Finland, Estonia, Latvia, Lithuania and Poland, Belarus, Ukraine, Georgia, Azerbaijan, Kazakhstan, China, Mongolia and North Korea. It shares maritime borders with Japan by the Sea of Okhotsk and the U.S. state of Alaska across the Bering Strait. However, Russia recognises two more countries that border it, Abkhazia and South Ossetia, both of which are internationally recognized as parts of Georgia.

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<i>Knoutsodonta oblonga</i> species of mollusc

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

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

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

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

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

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

Calycidoris guentheri is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusc in the family Calycidorididae.

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References

1 2 Martynov A.V., Korshunova T.A., Sanamyan N.P., Sanamyan K.E. 2009. Description of the first cryptobranch onchidoridid Onchimira cavifera gen. et sp. nov. and of three new species of the genera Adalaria and Onchidoris (Nudibranchia: Onchidorididae) from Kamchatka waters. Zootaxa. Vol. 2159. P. 1–43.
1 2 Bouchet, P. (2015). Onchidoris slavi. In: MolluscaBase (2015). Accessed through: World Register of Marine Species on 2016-01-21.

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[orig-1] 1 2 Martynov A.V., Korshunova T.A., Sanamyan N.P., Sanamyan K.E. 2009. Description of the first cryptobranch onchidoridid Onchimira cavifera gen. et sp. nov. and of three new species of the genera Adalaria and Onchidoris (Nudibranchia: Onchidorididae) from Kamchatka waters. Zootaxa. Vol. 2159. P. 1–43.

[WoRMS-2] 1 2 Bouchet, P. (2015). Onchidoris slavi. In: MolluscaBase (2015). Accessed through: World Register of Marine Species on 2016-01-21.