|
Thromidia
''Thromidia'' is a genus of starfish in the family Mithrodiidae. Description and characteristics These are unusually massive sea stars with five sausage-shaped arms, containing probably the heaviest species of Asteroidea, up to 6 kg. Species There are four recognized species according to World Register of Marine Species: * '' Thromidia brycei'' Marsh, 2009 – Western Australia * ''Thromidia catalai'' Pope & Rowe, 1977 – West Pacific * '' Thromidia gigas'' (Mortensen, 1935) – South-west Indian ocean * ''Thromidia seychellesensis ''Thromidia seychellesensis'' is a species of starfish of the Mithrodiidae The Mithrodiidae is a family of starfish in the order Valvatida. Members of this family are big to huge tropical sea stars with 5 arms, rounded in cross-section. Li ...'' Pope & Rowe, 1977 – Seychelles References Mithrodiidae Asteroidea genera {{Asteroidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thromidia Catalai
''Thromidia catalai'', sometimes called the heavy starfish, is a species of starfish in the family Mithrodiidae in the order Valvatida. It is native to the Indo-Pacific region. ''Thromidia catalai'' is one of the largest and heaviest starfishes in the world. It is reported to weigh as much as and have a diameter of . This species was first described by the Australian biologists E. C. Pope and F. W. E. Rowe in 1977, the type locality being New Caledonia. Description ''Thromidia catalai'' is a large starfish with five arms and a diameter of up to , weighing up to . The surface is covered with low tubercles, giving it a granular appearance. The arms are robust and cylindrical, not tapering much and having rounded tips. The disc is small, and both disc and arms are a pinkish-beige colour, apart from the tips of the arms, which are a dark orange-brown. In contrast to other members of the genus '' Thromidia'', the tips of the arms have small, widely spaced tubercles. The only other s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mithrodiidae
The Mithrodiidae is a family of starfish in the order Valvatida. Members of this family are big to huge tropical sea stars with 5 arms, rounded in cross-section. List of genera and species * Genus '' Mithrodia'' Gray, 1840 ** '' Mithrodia bradleyi'' Verrill, 1870 ** '' Mithrodia clavigera'' (Lamarck, 1816) ** '' Mithrodia fisheri'' Holly, 1932 * Genus '' Thromidia'' Pope & Rowe, 1977 ** '' Thromidia brycei'' Marsh, 2009 ** ''Thromidia catalai ''Thromidia catalai'', sometimes called the heavy starfish, is a species of starfish in the family Mithrodiidae in the order Valvatida. It is native to the Indo-Pacific region. ''Thromidia catalai'' is one of the largest and heaviest starfishes ...'' Pope & Rowe, 1977 ** '' Thromidia gigas'' (Mortensen, 1935) ** '' Thromidia seychellesensis'' Pope & Rowe, 1977 References Echinoderm families {{Asteroidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thromidia Brycei
''Thromidia brycei'', the thick-armed seastar, is a large, obese species of starfish in the family Mithrodiidae. It is native to the North Western Australia region and was described in 2009. Description ''Thromidia brycei'' is a large, obese starfish with a relatively small disc and five slightly tapering thick arms. The body is covered by thick pink, cream to light brown blotches on the skin which can sometimes be completely brown. The skeleton is covered in thick skin which is composed of small plates which are linked by radiating trabeculae. The tubercles are covered by rounded polygonal granules and small pointed almost scale like granules on the side. The tubercles continue at the same size to the ends of the arms. Habitat and distribution ''Thromidia brycei'' is found in the North Western Australia region. It is usually found on sandy shallows, mud, or rock typically with red and brown algae or encrusting organisms, often times with sponges, gorgonians, and alcyonacea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thromidia Seychellesensis
''Thromidia seychellesensis'' is a species of starfish of the Mithrodiidae The Mithrodiidae is a family of starfish in the order Valvatida. Members of this family are big to huge tropical sea stars with 5 arms, rounded in cross-section. List of genera and species * Genus '' Mithrodia'' Gray, 1840 ** '' Mithrodia br ... family and was described in 1977. References Mithrodiidae {{Improve categories, date=January 2022 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thromidia Gigas
''Thromidia gigas'' is a species of starfish in the family Mithrodiidae in the order Valvatida discovered by Mortensen in 1935. It lives off the coast of eastern South Africa and southern Madagascar. This species is probably the largest echinoderm An echinoderm () is any member of the phylum Echinodermata (). The adults are recognisable by their (usually five-point) radial symmetry, and include starfish, brittle stars, sea urchins, sand dollars, and sea cucumbers, as well as the sea ... in terms of bulk, and may exceed 13 lbs. Reference Mithrodiidae {{Improve categories, date=January 2022 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
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. The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million. However, only about 14% of these had been described by 2011. All species (except viruses) are given a two-part name, a "binomial". The first part of a binomial is the genus to which the species belongs. The second part is called the specific name or the specific epithet (in botanical nomenclature, also sometimes i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genus (biology)
Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below 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 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 of an ancestral taxon are grouped together (i.e. phylogenetic analysis should clearly demons ... [...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] |
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] |
