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Comaster
''Comaster'' is a genus of crinoids. Species The following species are included in the genus by the World Register of Marine Species: * ''Comaster audax'' Rowe, Hoggett, Birtles & Vail, 1986 * ''Comaster multifidus'' (Müller, 1841) * ''Comaster nobilis'' (Carpenter, 1884) * ''Comaster schlegelii'' (Carpenter, 1881) Image:Comasteridae - Comaster nobilis-001.jpg, ''Comaster nobilis'' Image:Comaster schlegelii.JPG, ''Comaster schlegelii'' References Comatulidae Crinoid genera {{Crinoidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Comaster Audax
''Comaster'' is a genus of crinoids. Species The following species are included in the genus by the World Register of Marine Species: * '' Comaster audax'' Rowe, Hoggett, Birtles & Vail, 1986 * ''Comaster multifidus'' (Müller, 1841) * '' Comaster nobilis'' (Carpenter, 1884) * ''Comaster schlegelii'' (Carpenter, 1881) Image:Comasteridae - Comaster nobilis-001.jpg, '' Comaster nobilis'' Image:Comaster schlegelii.JPG, ''Comaster schlegelii ''Comaster schlegelii'', the variable bushy feather star, is a crinoid in the family Comatulidae. It was previously classified as ''Comanthina schlegeli'' but further research showed that it was better placed in the genus '' Comaster''. It is fou ...'' References Comatulidae Crinoid genera {{Crinoidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Comaster Nobilis
''Comaster nobilis'', the noble feather star or yellow feather star, is a crinoid in the family Comatulidae. It was previously classified as ''Comanthina nobilis'' but further research showed that it was better placed in the genus ''Comaster''. Description ''Comaster nobilis'' can reach a diameter of about . It has a cup-shaped body with 35-40 arms, extended out from the central disc. This species may occur in a number of colour variations. Usually it has yellow arms, sometimes with some black or green and white on the under surface close to the centre. It feeds on detritus, phytoplankton and zooplankton. The larvae of this feather star swim freely with plankton for a few weeks, then they settle down growing into a stalked form. Mature specimen break the stalk becoming free-living. Distribution This species is widespread in the Indo-Pacific, from Coral Sea and Great Barrier Reef up to Indonesia, Malaysia, New Caledonia and Philippines The Philippines, officially the R ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Comaster Schlegelii
''Comaster schlegelii'', the variable bushy feather star, is a crinoid in the family Comatulidae. It was previously classified as ''Comanthina schlegeli'' but further research showed that it was better placed in the genus '' Comaster''. It is found on shallow water reefs in the western Pacific Ocean. Description The variable bushy feather star often keeps its body concealed in a crevice and the only visible part is its array of arms, especially when it is young. There are in fact five rays attached to the upper part of the body but these subdivide into a number of arms and when one of these is lost, two grow in its place. The arms are flexible, being formed from many jointed calcareous small plates known as ossicles, and can be coiled up. On either side of each arm are short side branches known as pinnules. On the underside of the body are about twenty clawlike appendages known as cirri which are used to cling on to the underlying surface, but they are lost in older specime ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Comatulidae
Comatulidae is a family of comatulid crinoids. Since 2015, it replaces the family Comasteridae. Description and characteristics This family is of recent restoration, and still has no consensual description. However the description of the family Comasteridae remains partially valid. This family counts between 93 and 95 species, distributed in 21 genera, which makes it the second most diversified family of crinoids the behind Antedonidae, representing approximately 1/6th of known crinoid species. It contains most of the big species of shallow tropical feather stars, in particular in the Indo-Pacific. List of genera This family has been recently restored following genetic works from Charles Messing's team. It contains the following genera: * subfamily Comatellinae Summers, Messing, Rouse, 2014 ** genus '' Alloeocomatella'' Messing, 1995 -- 2 species ** genus '' Comatella'' AH Clark, 1908 -- 2 species ** genus '' Davidaster'' Hoggett & Rowe, 1986 -- 2 species ** genus '' N ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crinoid
Crinoids are marine invertebrates that make up the class Crinoidea. Crinoids that remain attached to the sea floor by a stalk in their adult form are commonly called sea lilies, while the unstalked forms, called feather stars or comatulids, are members of the largest crinoid order, Comatulida. Crinoids are echinoderms in the phylum Echinodermata, which also includes the starfish, brittle stars, sea urchins and sea cucumbers. They live in both shallow water and in depths of over . Adult crinoids are characterised by having the mouth located on the upper surface. This is surrounded by feeding arms, and is linked to a U-shaped gut, with the anus being located on the oral disc near the mouth. Although the basic echinoderm pattern of fivefold symmetry can be recognised, in most crinoids the five arms are subdivided into ten or more. These have feathery pinnules and are spread wide to gather planktonic particles from the water. At some stage in their lives, most crinoids have a sho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Louis Agassiz
Jean Louis Rodolphe Agassiz ( ; ) FRS (For) FRSE (May 28, 1807 – December 14, 1873) was a Swiss-born American biologist and geologist who is recognized as a scholar of Earth's natural history. Spending his early life in Switzerland, he received a PhD at Erlangen and a medical degree in Munich. After studying with Georges Cuvier and Alexander von Humboldt in Paris, Agassiz was appointed professor of natural history at the University of Neuchâtel. He emigrated to the United States in 1847 after visiting Harvard University. He went on to become professor of zoology and geology at Harvard, to head its Lawrence Scientific School, and to found its Museum of Comparative Zoology. Agassiz is known for observational data gathering and analysis. He made institutional and scientific contributions to zoology, geology, and related areas, including multivolume research books running to thousands of pages. He is particularly known for his contributions to ichthyological classification, incl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genus
Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. 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 of an ancestral taxon are grouped together (i.e. Phylogeneti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
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. It is the basic unit of Taxonomy (biology), classification and a taxonomic rank of an organism, as well as a unit of biodiversity. Other ways of defining species include their karyotype, DNA sequence, morphology (biology), morphology, behaviour, or ecological niche. In addition, palaeontologists 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. About 14% of these had been described by 2011. All species (except viruses) are given a binomial nomenclature, two-part name, a "binomen". The first part of a binomen is the name of a genus to which the species belongs. The second part is called the specific name (zoology), specific name or the specific ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
