Aegires gracilis | |
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Scientific classification | |
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | Gastropoda |
(unranked): | clade Heterobranchia clade Euthyneura clade Nudipleura clade Nudibranchia clade Euctenidiacea clade Doridacea |
Superfamily: | Polyceroidea |
Family: | Aegiridae |
Genus: | Aegires |
Species: | A. gracilis |
Binomial name | |
Aegires gracilis Ortea, Moro & Espinosa 2015 [1] | |
Aegires gracilis is a species of sea slug, a nudibranch, a marine, opisthobranch gastropod mollusc in the family Aegiridae. [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.
This species was described from the Caribbean Sea coast of Costa Rica. [1]
Costa Rica, officially the Republic of Costa Rica, is a country in Central America, bordered by Nicaragua to the north, the Caribbean Sea to the northeast, Panama to the southeast, the Pacific Ocean to the southwest, and Ecuador to the south of Cocos Island. It has a population of around 5 million in a land area of 51,060 square kilometers. An estimated 333,980 people live in the capital and largest city, San José with around 2 million people in the surrounding metropolitan area.
Aegires is a genus of sea slugs, dorid nudibranchs, marine gastropod mollusks in the family Aegiridae. Species within this genus feed exclusively on calcareous sponges.
Aegires exeches is a species of sea slug. It is a dorid nudibranch, a shell-less marine gastropod mollusc in the family Aegiridae.
Aegires flores is a species of sea slug. It is a dorid nudibranch, a shell-less marine gastropod mollusc in the family Aegiridae.
Aegires hapsis is a species of sea slug. It is a dorid nudibranch, a shell-less marine gastropod mollusc in the family Aegiridae.
Aegires incusus is a species of sea slug. It is a dorid nudibranch, a shell-less marine gastropod mollusc in the family Aegiridae.
Aegires lemoncello is a species of sea slug. It is a dorid nudibranch, a shell-less marine gastropod mollusc in the family Aegiridae.
Aegires malinus is a species of sea slug. It is a dorid nudibranch, a shell-less marine gastropod mollusc in the family Aegiridae.
Aegires petalis is a species of sea slug. It is a dorid nudibranch, a shell-less marine gastropod mollusc in the family Aegiridae.
Aegires albopunctatus, common name salt-and-pepper doris, is a species of sea slug, an Eastern Pacific Ocean nudibranch, a marine, opisthobranch gastropod mollusk in the family Aegiridae.
Aegires albus is a species of sea slug, a nudibranch, a marine, opisthobranch gastropod mollusk in the family Aegiridae. Its synonym Anaegires protectus Odhner, 1934 is the type species of the genus Anaegires Odhner, 1934 which was merged with Aegires by Wägele in 1987.
Aegires evorae is a species of sea slug, a nudibranch, a marine, opisthobranch gastropod mollusc in the family Aegiridae.
Aegires absalaoi is a species of sea slug, a nudibranch, a marine, opisthobranch gastropod mollusc in the family Aegiridae.
Aegires acauda is a species of sea slug, a nudibranch, a marine, opisthobranch gastropod mollusc in the family Aegiridae.
Aegires corrugatus is a species of sea slug, a nudibranch, a marine, opisthobranch gastropod mollusc in the family Aegiridae.
Aegires lagrifaensis is a species of sea slug, a nudibranch, a marine, opisthobranch gastropod mollusc in the family Aegiridae.
Aegires gomezi is a species of sea slug, a nudibranch, a marine, opisthobranch gastropod mollusk in the family Aegiridae.
Aegires palensis is a species of sea slug, a nudibranch, a marine, opisthobranch gastropod mollusk in the family Aegiridae.
Aegires sublaevis is a species of sea slug, a nudibranch, a marine, opisthobranch gastropod mollusk in the family Aegiridae.
Aegires leuckartii is a species of sea slug, a nudibranch, a marine, opisthobranch gastropod mollusk in the family Aegiridae.
Aegires ochum is a species of sea slug, a nudibranch, a marine, opisthobranch gastropod mollusk in the family Aegiridae.