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Lytechinus Callipeplus
''Lytechinus'' is a genus of sea urchins. Species The following extant species are listed in this genus by the World Register of Marine Species: Retrieved September 9, 2018 * '' Lytechinus callipeplus'' H.L. Clark, 1912 * '' Lytechinus euerces'' H.L. Clark, 1912 * '' Lytechinus panamensis'' Mortensen, 1921 * '' Lytechinus pictus'' (V ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lytechinus Variegatus
''Lytechinus variegatus'', commonly called the green sea urchin or the variegated sea urchin, is a species of sea urchin that can be found in the warm waters of the western Atlantic Ocean and Caribbean Sea. Subspecies There are four subspecies: Description The green sea urchin has a globular test (shell) densely covered in spines and can reach a diameter of around . The test may be purple, green or dull red, blotched with white. The majority of the spines are short but there are a few longer primary spines. The spines vary in colour, sometimes being one colour at the base and a different colour at the tip. Green test with green spines or green test with white spines are the most common combinations found in the Caribbean. In between the spines are pedicellaria, pincer like structures. These are white which distinguishes the green sea urchin from the rather similar '' Lytechinus williamsi'' which has purple pedicellaria. Distribution and habitat The green sea urchin occurs ... [...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] |
Lytechinus Williamsi
''Lytechinus williamsi'', the jewel urchin, is a sea urchin in the family Toxopneustidae. It occurs on shallow reefs off the coasts of Panama, Belize, the Florida Keys and Jamaica. Description The jewel urchin grows to a diameter of about and has spines up to long. Many of them are shorter than this and provide a dense covering. The test is usually a pale brown colour with a red or dark brown stripe along the joints of the main interambulacral plates. The spines are either deep green or white and have a ridge running along one side of each, a fact that distinguishes this species from the very similar ''Lytechinus variegatus''. In between the spines are large purple tweezer shaped structures called pedicellariae which are also distinctive, ''L. variegatus'' having white pedicellariae. Distribution and habitat The jewel urchin is the commonest sea urchin on some coral reefs in the Caribbean Sea but it seems to be restricted to the coasts of Panama, Belize, the Florida Keys and J ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lytechinus Semituberculatus
Lytechinus semituberculatus, commonly known as the green hedgehog or green sea urchin, is a sea urchin Sea urchins () are spiny, globular echinoderms in the class Echinoidea. About 950 species of sea urchin live on the seabed of every ocean and inhabit every depth zone from the intertidal seashore down to . The spherical, hard shells (tests) of ... found in the coast of the Galapagos Islands. It is recognizable by its green coloration. Its conservation status is unknown. Gallery File:Lytechinus semituberculatus.jpg, ''Lytechinus semituberculatus'' scan File:Lytechinus semituberculatus 02.jpg, ''Lytechinus semituberculatus'' scan File:Lytechinus semituberculatus 16 May Fernandina Snorkel (47927457227).jpg, ''Lytechinus semituberculatus'' in its natural habitat References Lytechinus Echinoidea genera Animals described in 1846 {{Echinoidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lytechinus Pictus
''Lytechinus pictus'', commonly known as the painted urchin, is a sea urchin in the family Toxopneustidae. It occurs on shallow reefs in the tropical and subtropical eastern Pacific Ocean, off the coasts of California, Central America and South America as far south as Ecuador. Taxonomy This sea urchin was first described in 1867 by the American zoologist Addison Emery Verrill who gave it the name ''Psammechinus pictus''. It was later transferred to the genus ''Lytechinus'' and became ''Lytechinus pictus''. In 1912, another species ''Lytechinus anamesus'' was described by American zoologist Hubert Lyman Clark as ''Lytechinus anamesus''. He was the curator of echinoderms at the Museum of Comparative Zoology at Harvard University at the time. It had long been suspected that ''L. pictus'' and ''L. anamesus'' were synonymous, and this was confirmed by analysis of mitochondrial DNA in 2004. Description The test of this sea urchin is up to in diameter. The general colour is greyish ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lytechinus Panamensis
''Lytechinus'' is a genus of sea urchins. Species The following extant species are listed in this genus by the World Register of Marine Species: Retrieved September 9, 2018 * '''' H.L. Clark, 1912 * '' Lytechinus euerces'' H.L. Clark, 1912 * '' Lytechinus panamensis'' Mortensen, 1921 * '' |
Lytechinus Euerces
''Lytechinus'' is a genus of sea urchins. Species The following extant species are listed in this genus by the World Register of Marine Species: Retrieved September 9, 2018 * '''' H.L. Clark, 1912 * '' Lytechinus euerces'' H.L. Clark, 1912 * '''' Mortensen, 1921 * '' |
Lytechinus Callipeplus
''Lytechinus'' is a genus of sea urchins. Species The following extant species are listed in this genus by the World Register of Marine Species: Retrieved September 9, 2018 * '' Lytechinus callipeplus'' H.L. Clark, 1912 * '' Lytechinus euerces'' H.L. Clark, 1912 * '' Lytechinus panamensis'' Mortensen, 1921 * '' Lytechinus pictus'' (V ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sea Urchin
Sea urchins () are spiny, globular echinoderms in the class Echinoidea. About 950 species of sea urchin live on the seabed of every ocean and inhabit every depth zone from the intertidal seashore down to . The spherical, hard shells (tests) of sea urchins are round and spiny, ranging in diameter from . Sea urchins move slowly, crawling with tube feet, and also propel themselves with their spines. Although algae are the primary diet, sea urchins also eat slow-moving (sessile) animals. Predators that eat sea urchins include a wide variety of fish, starfish, crabs, marine mammals. Sea urchins are also used as food especially in Japan. Adult sea urchins have fivefold symmetry, but their pluteus larvae feature bilateral (mirror) symmetry, indicating that the sea urchin belongs to the Bilateria group of animal phyla, which also comprises the chordates and the arthropods, the annelids and the molluscs, and are found in every ocean and in every climate, from the tropics to the pol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Animal
Animals are multicellular, eukaryotic organisms in the Kingdom (biology), biological kingdom Animalia. With few exceptions, animals Heterotroph, consume organic material, Cellular respiration#Aerobic respiration, breathe oxygen, are Motility, able to move, can Sexual reproduction, reproduce sexually, and go through an ontogenetic stage in which their body consists of a hollow sphere of Cell (biology), cells, the blastula, during Embryogenesis, embryonic development. Over 1.5 million Extant taxon, living animal species have been Species description, described—of which around 1 million are Insecta, insects—but it has been estimated there are over 7 million animal species in total. Animals range in length from to . They have Ecology, complex interactions with each other and their environments, forming intricate food webs. The scientific study of animals is known as zoology. Most living animal species are in Bilateria, a clade whose members have a Symmetry in biology#Bilate ... [...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] |
Alexander Agassiz
Alexander Emmanuel Rodolphe Agassiz (December 17, 1835March 27, 1910), son of Louis Agassiz and stepson of Elizabeth Cabot Agassiz, was an American scientist and engineer. Biography Agassiz was born in Neuchâtel, Switzerland and immigrated to the United States with his parents, Louis and Cecile (Braun) Agassiz, in 1846. He graduated from Harvard University in 1855, subsequently studying engineering and chemistry, and taking the degree of Bachelor of Science at the Lawrence Scientific School of the same institution in 1857; in 1859 became an assistant in the United States Coast Survey. Thenceforward he became a specialist in marine ichthyology. Agassiz was elected a Fellow of the American Academy of Arts and Sciences in 1862. Up until the summer of 1866, Agassiz worked as assistant curator in the museum of natural history that his father founded at Harvard. E. J. Hulbert, a friend of Agassiz's brother-in-law, Quincy Adams Shaw, had discovered a rich copper lode known as the C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
