Cuthonella berghi

Cuthonella berghi
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
(unranked):	clade Heterobranchia ; clade Euthyneura ; clade Nudipleura ; clade Nudibranchia ; clade Dexiarchia ; clade Cladobranchia ; clade Aeolidida
Superfamily:	Fionoidea
Family:	Cuthonellidae
Genus:	Cuthonella
Species:	C. berghi
Binomial name
	Cuthonella berghi; Friele, 1902 [1]

Last updated March 22, 2019

Cuthonella berghi is a species of sea slug, an aeolid nudibranch, a marine gastropod mollusc in the family Cuthonellidae.^[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 a single specimen collected at 550 m depth in the Denmark Strait at 66°42′N26°40′W / 66.700°N 26.667°W / 66.700; -26.667 .

The Denmark Strait or Greenland Strait is an oceanic strait between Greenland to its northwest and Iceland to its southeast. The Norwegian island of Jan Mayen lies northeast of the strait.

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<i>Cuthonella concinna</i> species of mollusc

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Cuthonella cocoachroma is a species of sea slug, an aeolid nudibranch, a marine gastropod mollusc in the family Cuthonellidae.

Cuthonella is a genus of sea slugs, specifically aeolid nudibranchs, marine gastropod molluscs in the family Cuthonellidae.

Cuthonella elenae is a species of sea slug, an aeolid nudibranch, a marine gastropod mollusc in the family Cuthonellidae.

Cuthonella elioti is a species of sea slug, an aeolid nudibranch, a marine gastropod mollusc in the family Cuthonellidae. It is a replacement name for Cuthonella antarctica Eliot, 1907.

Cuthonella modesta is a species of sea slug, an aeolid nudibranch, a marine gastropod mollusc in the family Cuthonellidae.

Cuthonellidae is a family of sea slugs, aeolid nudibranchs, marine gastropod molluscs in the superfamily Fionoidea.

References

↑ Friele, H. (1902). Mollusken der ersten Nordmeerfahrt des Fischereidamfers “Michael Sars” 1900 unter Leitung von Herrn Dr. Johan Hjort. Bergens Museums Aarbog (3):1-19, pls. 1-4.
↑ Gofas, S. (2014). Cuthonella berghi. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=748290 on 2015-02-10

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[1] Friele, H. (1902). Mollusken der ersten Nordmeerfahrt des Fischereidamfers “Michael Sars” 1900 unter Leitung von Herrn Dr. Johan Hjort. Bergens Museums Aarbog (3):1-19, pls. 1-4.

[2] Gofas, S. (2014). Cuthonella berghi. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=748290 on 2015-02-10