Okenia evelinae | |
---|---|
Scientific classification | |
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | Gastropoda |
(unranked): | clade Heterobranchia clade Euthyneura clade Nudipleura clade Nudibranchia clade Euctenidiacea clade Doridacea |
Superfamily: | Onchidoridoidea |
Family: | Goniodorididae |
Genus: | Okenia |
Species: | O. evelinae |
Binomial name | |
Okenia evelinae Marcus, 1957 [1] | |
Okenia evelinae is a species of sea slug, specifically a dorid nudibranch, a marine gastropod mollusc in the family Goniodorididae. [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.
Doridacea is a taxonomic grouping of dorid nudibranchs, shell-less marine gastropod mollusks. included in the clade Euctenidiacea of the clade Nudibranchia.
This species was described from Ubatuba, Brazil. It has been reported from Brazil to Lake Worth Lagoon, Florida. [3] [4]
Ubatuba is a Brazilian municipality, located on the southeast coast, in the state of São Paulo. It is part of the Metropolitan Region of Vale do Paraíba e Litoral Norte. The population is 86,392 in an area of 723.88 km².
Brazil, officially the Federative Republic of Brazil, is the largest country in both South America and Latin America. At 8.5 million square kilometers and with over 208 million people, Brazil is the world's fifth-largest country by area and the fifth most populous. Its capital is Brasília, and its most populated city is São Paulo. The federation is composed of the union of the 26 states, the Federal District, and the 5,570 municipalities. It is the largest country to have Portuguese as an official language and the only one in the Americas; it is also one of the most multicultural and ethnically diverse nations, due to over a century of mass immigration from around the world.
The Lake Worth Lagoon is a lagoon located in Palm Beach County, Florida. It runs parallel to the coast, and is separated from the Atlantic Ocean by barrier beaches, including Palm Beach Island. The lagoon is connected to the Atlantic Ocean by two permanent, man-made inlets.
This Okenia has a narrow body and six pairs of short lateral papillae. There are two papillae on the mid-line of the back and two more on either side of the papilla which is just in front of the gills. The body is translucent white with opaque white spots. The bases of the rhinophores are brown and this pigment may form an indistinct line down both sides of the back and tail.
The maximum recorded body length is 8 mm. [5]
Minimum recorded depth is 0 m. [5] Maximum recorded depth is 0 m. [5]
The diet of this species is the ctenostome bryozoan, Amathia distans Busk, 1886. [3]
The Ctenostomata are an order of bryozoans in the class Gymnolaemata. The great majority of ctenostome species are marine, although Paludicella inhabits freshwater. They are distinguished from their close relatives, the cheilostomes, by their lack of a calcified exoskeleton. Instead, the exoskeleton is chitinous, gelatinous, or composed only of a soft membrane, and always lacks an operculum. Colonies of ctenostomes are often composed of elongated, branch-like stolons, although more compact forms also exist.
Doto pita is a species of sea slug, a small nudibranch, a shell-less marine gastropod mollusc in the family Dotidae.
Okenia is a genus of colorful sea slugs, specifically of dorid nudibranchs, marine gastropod mollusks in the family Goniodorididae.
Tyrinna evelinae is a species of sea slug or dorid nudibranch, a marine gastropod mollusk in the family Chromodorididae.
Flabellina engeli is a species of sea slug, an aeolid nudibranch, a marine gastropod mollusc in the family Flabellinidae.
Okenia zoobotryon is a species of sea slug, a dorid nudibranch, a marine gastropod mollusc in the family Goniodorididae. It is normally found on the colonial bryozoan Zoobotryon verticillatum on which it lives and feeds.
Okenia vena is a species of sea slug, specifically a dorid nudibranch, a marine gastropod mollusc in the family Goniodorididae.
Okenia angelensis common name Los Angeles Okenia, is a species of sea slug, specifically a dorid nudibranch, a marine gastropod mollusc in the family Goniodorididae.
Okenia mija is a species of sea slug, specifically a dorid nudibranch, a marine gastropod mollusc in the family Goniodorididae.
Okenia distincta is a species of sea slug, specifically a dorid nudibranch, a marine gastropod mollusc in the family Goniodorididae.
Okenia kendi is a species of sea slug, specifically a dorid nudibranch, a marine gastropod mollusc in the family Goniodorididae.
Okenia liklik is a species of sea slug, specifically a dorid nudibranch, a marine gastropod mollusc in the family Goniodorididae.
Okenia mexicorum is a species of sea slug, specifically a dorid nudibranch, a marine gastropod mollusc in the family Goniodorididae.
Okenia eolida is a species of sea slug, specifically a dorid nudibranch, a marine gastropod mollusc in the family Goniodorididae.
Okenia hiroi is a species of sea slug, specifically a dorid nudibranch, a marine gastropod mollusc in the family Goniodorididae.
Okenia impexa is a species of sea slug, specifically a dorid nudibranch, a marine gastropod mollusc in the family Goniodorididae.
Okenia kondoi is a species of sea slug, specifically a dorid nudibranch, a marine gastropod mollusc in the family Goniodorididae. It is the type species of the genus Sakishimaia.
Okenia nakamotoensis is a species of sea slug, specifically a dorid nudibranch, a marine gastropod mollusc in the family Goniodorididae.
Okenia vancouverensis is a species of sea slug, specifically a dorid nudibranch, a marine gastropod mollusc in the family Goniodorididae.
Trapania maringa is a species of sea slug, a dorid nudibranch, a marine gastropod mollusc in the family Goniodorididae.
Polycera aurisula is a species of sea slug, a nudibranch, a marine gastropod mollusk in the family Polyceridae.