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Metrodira Dubia
''Metrodira'' is a genus of starfish in the family Echinasteridae. Species The following species are recognised by the World Register of Marine Species: *'' Metrodira dubia'' *''Metrodira gracilenta'' Lovén *'' Metrodira subtilis'' (Lutken, 1871) *''Metrodira subulata ''Metrodira subulata'' is a species of starfish in the family Echinasteridae. It is found on the seabed in shallow parts of the Indo-Pacific region. Description ''Metrodira subulata'' has long, slender tapering arms. The aboral (upper) surface h ...'' Gray, 1840 References Echinasteridae Asteroidea genera {{Asteroidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus comes above species and below family (taxonomy), family. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus. :E.g. ''Panthera leo'' (lion) and ''Panthera onca'' (jaguar) are two species within the genus ''Panthera''. ''Panthera'' is a genus within the family Felidae. The composition of a genus is determined by taxonomy (biology), taxonomists. The standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. There are some general practices used, however, including the idea that a newly defined genus should fulfill these three criteria to be descriptively useful: # monophyly – all descendants ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Starfish
Starfish or sea stars are star-shaped echinoderms belonging to the class Asteroidea (). Common usage frequently finds these names being also applied to ophiuroids, which are correctly referred to as brittle stars or basket stars. Starfish are also known as asteroids due to being in the class Asteroidea. About 1,900 species of starfish live on the seabed in all the world's oceans, from warm, tropical zones to frigid, polar regions. They are found from the intertidal zone down to abyssal depths, at below the surface. Starfish are marine invertebrates. They typically have a central disc and usually five arms, though some species have a larger number of arms. The aboral or upper surface may be smooth, granular or spiny, and is covered with overlapping plates. Many species are brightly coloured in various shades of red or orange, while others are blue, grey or brown. Starfish have tube feet operated by a hydraulic system and a mouth at the centre of the oral or lower surface. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Family (biology)
Family ( la, familia, plural ') is one of the eight major hierarchical taxonomic ranks in Linnaean taxonomy. It is classified between order and genus. A family may be divided into subfamilies, which are intermediate ranks between the ranks of family and genus. The official family names are Latin in origin; however, popular names are often used: for example, walnut trees and hickory trees belong to the family Juglandaceae, but that family is commonly referred to as the "walnut family". What belongs to a family—or if a described family should be recognized at all—are proposed and determined by practicing taxonomists. There are no hard rules for describing or recognizing a family, but in plants, they can be characterized on the basis of both vegetative and reproductive features of plant species. Taxonomists often take different positions about descriptions, and there may be no broad consensus across the scientific community for some time. The publishing of new data and opini ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Echinasteridae
The Echinasteridae are a family of starfish in the monotypic order Spinulosida. The family includes eight genera and about 133 species found on the seabed in various habitats around the world. Taxonomy Echinasteridae contains eight genera and about 133 species. The two genera '' Echinaster'' and ''Henricia'' are the most speciose, forming species complexes. ''Echinaster'' has a largely tropical distribution and occurs in shallow seas including continental shelves, while ''Henricia'' is cosmopolitan, occurring mostly in cold waters, including polar habitats and abyssal locations. '' Aleutihenricia'' and '' Odontohenricia'' are native to the northeastern Pacific Ocean, in the vicinity of the Aleutian Islands. Characteristics Echinasterids are mostly five-armed starfish with thick but small discs, and long, slender, often cylindrical arms. The cuticle is covered on both the aboral (upper) and oral (lower) surfaces by a latticework of ossicles which are either flattened or rounded ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
World Register Of Marine Species
The World Register of Marine Species (WoRMS) is a taxonomic database that aims to provide an authoritative and comprehensive list of names of marine organisms. Content The content of the registry is edited and maintained by scientific specialists on each group of organism. These taxonomists control the quality of the information, which is gathered from the primary scientific literature as well as from some external regional and taxon-specific databases. WoRMS maintains valid names of all marine organisms, but also provides information on synonyms and invalid names. It is an ongoing task to maintain the registry, since new species are constantly being discovered and described by scientists; in addition, the nomenclature and taxonomy of existing species is often corrected or changed as new research is constantly being published. Subsets of WoRMS content are made available, and can have separate badging and their own home/launch pages, as "subregisters", such as the ''World List of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metrodira Dubia
''Metrodira'' is a genus of starfish in the family Echinasteridae. Species The following species are recognised by the World Register of Marine Species: *'' Metrodira dubia'' *''Metrodira gracilenta'' Lovén *'' Metrodira subtilis'' (Lutken, 1871) *''Metrodira subulata ''Metrodira subulata'' is a species of starfish in the family Echinasteridae. It is found on the seabed in shallow parts of the Indo-Pacific region. Description ''Metrodira subulata'' has long, slender tapering arms. The aboral (upper) surface h ...'' Gray, 1840 References Echinasteridae Asteroidea genera {{Asteroidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metrodira Gracilenta
''Metrodira'' is a genus of starfish in the family Echinasteridae. Species The following species are recognised by the World Register of Marine Species: *'' Metrodira dubia'' *'' Metrodira gracilenta'' Lovén *'' Metrodira subtilis'' (Lutken, 1871) *''Metrodira subulata ''Metrodira subulata'' is a species of starfish in the family Echinasteridae. It is found on the seabed in shallow parts of the Indo-Pacific region. Description ''Metrodira subulata'' has long, slender tapering arms. The aboral (upper) surface h ...'' Gray, 1840 References Echinasteridae Asteroidea genera {{Asteroidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metrodira Subtilis
''Metrodira'' is a genus of starfish in the family Echinasteridae. Species The following species are recognised by the World Register of Marine Species: *''Metrodira dubia'' *''Metrodira gracilenta'' Lovén *'' Metrodira subtilis'' (Lutken, 1871) *''Metrodira subulata ''Metrodira subulata'' is a species of starfish in the family Echinasteridae. It is found on the seabed in shallow parts of the Indo-Pacific region. Description ''Metrodira subulata'' has long, slender tapering arms. The aboral (upper) surface h ...'' Gray, 1840 References Echinasteridae Asteroidea genera {{Asteroidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metrodira Subulata
''Metrodira subulata'' is a species of starfish in the family Echinasteridae. It is found on the seabed in shallow parts of the Indo-Pacific region. Description ''Metrodira subulata'' has long, slender tapering arms. The aboral (upper) surface has many granulations and large pores. The margins have a row of smooth plates and there are short spines at the junctions of the plates. The colour of the aboral surface is yellowish brown. The spines are red, which contrasts with the sombre body colour and is considered an aposematic Aposematism is the advertising by an animal to potential predators that it is not worth attacking or eating. This unprofitability may consist of any defences which make the prey difficult to kill and eat, such as toxicity, venom, foul taste or ... trait. References Echinasteridae Starfish described in 1840 {{asteroidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
