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Aporocidaris
''Aporocidaris'' is a genus of sea urchins in the family Ctenocidaridae. Several species are found in deep water in circum-Antarctic locations. Characteristics The test is rather compressed, with a flat base and thin fragile plates, and the apical system is conspicuously domed. The primary spines are long and very slender and the secondary spines are cylindrical and erect. Species The following species are recognised by the World Register of Marine Species: *''Aporocidaris antarctica'' Mortensen, 1909 *''Aporocidaris eltaniana'' Mooi, David, Fell & Choné, 2000 *''Aporocidaris fragilis'' Agassiz & Clark, 1907 *''Aporocidaris incerta'' (Koehler, 1902) *''Aporocidaris milleri'' (Agassiz, 1898) *''Aporocidaris usarpi ''Aporocidaris usarpi'' is a species of sea urchin of the family Ctenocidaridae. Their armour is covered with spines. It is placed in the genus Aporocidaris and lives in the sea. Aporocidaris usarpi was first scientifically described in 2000 by M ...'' Mooi, David, ... [...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] |
Hubert Lyman Clark
Hubert Lyman Clark (January 9, 1870 – July 31, 1947) was an American zoologist. The son of Professor William Smith Clark, he was born at Amherst, Massachusetts, and educated at Amherst College and Johns Hopkins University. From 1899 to 1905 he was professor of biology at Olivet College. Beginning in 1905, Clark worked as assistant in invertebrate zoology at the Museum of Comparative Zoology at Harvard University. He was curator of echinoderms from 1910 to 1927, and curator of marine invertebrates and associate professor of zoology beginning 1927. He was awarded the Clarke Medal by the Royal Society of New South Wales in 1947. Work He carried on scientific investigations in Jamaica, Bermuda and Australia, where he collected in 1913, 1929 and 1932, and published many papers dealing with birds, snakes, echinoderms and flowers. His publications include: *''The Birds of Amherst and Vicinity'' (1887) *''The Echinoderms of Porto Rico'' (1901) *''A New Ophiuran from the West Indi ... [...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] |
Ctenocidaridae
Ctenocidaridae is a family of echinoderms belonging to the order Cidaroida. Genera: * '' Aporocidaris'' Agassiz & Clark, 1907 * '' Ctenocidaris'' Mortensen, 1910 * '' Homalocidaris'' Mortensen, 1928 * ''Notocidaris ''Notocidaris'' is a genus of echinoderms 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 dolla ...'' Mortensen, 1909 * '' Rhynchocidaris'' Mortensen, 1909 References Cidaroida Echinoderm families {{echinoidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Test (biology)
In biology, a test is the hard shell of some spherical marine animals and protists, notably sea urchins and microorganisms such as testate foraminiferans, radiolarians, and testate amoebae. The term is also applied to the covering of scale insects. The related Latin term testa is used for the hard seed coat of plant seeds. Etymology The anatomical term "test" derives from the Latin ''testa'' (which means a rounded bowl, amphora or bottle). Structure The test is a skeletal structure, made of hard material such as calcium carbonate, silica, chitin or composite materials. As such, it allows the protection of the internal organs and the attachment of soft flesh. In sea urchins The test of sea urchins is made of calcium carbonate, strengthened by a framework of calcite monocrystals, in a characteristic "stereomic" structure. These two ingredients provide sea urchins with a great solidity and a moderate weight, as well as the capacity to regenerate the mesh from the cuticle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aporocidaris Antarctica
''Aporocidaris antarctica'' is a species of sea urchin of the family Ctenocidaridae. Their armour is covered with spines. It is placed in the genus Aporocidaris and lives in the sea. ''Aporocidaris antarctica'' was first scientifically described in 1909 by Ole Theodor Jensen Mortensen, Danish professor.Kroh, A. (2010). ''Aporocidaris antarctica'' (Ole Theodor Jensen Mortensen, 1909). In: Kroh, A. & Mooi, R. (2010World Echinoidea Database at the World Register of Marine Species. It has a circum-Antarctic distribution. Description ''Aporocidaris antarctica'' grows to a maximum diameter of . The test and secondary spines are purple and the rather brittle primary spines are white. See also *'' Apatopygus recens'' (Milne-Edwards, 1836) *''Aphanopora echinobrissoides'' (de Meijere, 1903) *''Aporocidaris eltaniana ''Aporocidaris eltaniana'' is a species of sea urchin of the family Ctenocidaridae. Their armour is covered with spines. It is placed in the genus Aporocidaris and liv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ole Theodor Jensen Mortensen
Ole Theodor Jensen Mortensen, also known as Theodor Mortensen (22 February 1868 – 3 April 1952) was a Danish scientist and professor at the Zoological Museum, Copenhagen. He specialized in 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 ...s (Echinoidea) and provided an enormous marine collection to the museum. He collected many sea urchin species on his expeditions between 1899–1930.Mortensen Echinoids.nl Mortensen is the author of ''A Monograph of the echinoidea'' and ''Report on the echinoidea collected by the United States fisheries steamer "Albatross" during the Philippine expedition, 1907–1910''. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aporocidaris Eltaniana
''Aporocidaris eltaniana'' is a species of sea urchin of the family Ctenocidaridae. Their armour is covered with spines. It is placed in the genus Aporocidaris and lives in the sea. Aporocidaris eltaniana was first scientifically described in 2000 by Mooi, David, Fell & Choné. It is found in the waters off Livingston Island in the South Shetland Islands at depths between . Description ''Aporocidaris eltaniana'' grows to a maximum diameter of with a height of about half this. See also * Aphanopora echinobrissoides * Aporocidaris antarctica * Aporocidaris fragilis ''Aporocidaris fragilis'' is a species of sea urchin of the family Ctenocidaridae. It is well-armoured with spines. It is placed in the genus Aporocidaris and lives in the sea. ''Aporocidaris fragilis'' was first scientifically described in 1907 ... References Ctenocidaridae Animals described in 2000 {{echinoidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aporocidaris Fragilis
''Aporocidaris fragilis'' is a species of sea urchin of the family Ctenocidaridae. It is well-armoured with spines. It is placed in the genus Aporocidaris and lives in the sea. ''Aporocidaris fragilis'' was first scientifically described in 1907 by Alexander Emanuel 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 t ... & Hubert Lyman Clark.Kroh, A. (2010). ''Aporocidaris fragilis'' (Alexander Emanuel Agassiz & Hubert Lyman Clark, 1907). In: Kroh, A. & Mooi, R. (2010World Echinoidea Database at the World Register of Marine Species. This species is morphologically very similar to '' Aporocidaris milleri'' and '' Aporocidaris antarctica'' and they may not be separate species. ''Aporocidaris fragilis'' is found in the North Pacific Ocean between the Kamchatka Peninsula and Al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aporocidaris Incerta
''Aporocidaris incerta'' is a species of sea urchin of the family Ctenocidaridae. It is placed in the genus Aporocidaris and lives in the deep sea. ''Aporocidaris incerta'' was first scientifically described in 1902 by Koehler.Kroh, A. (2010). ''Aporocidaris incerta'' (Koehler, 1902). In: Kroh, A. & Mooi, R. (2010World Echinoidea Database at the World Register of Marine Species. This species lives around the Antarctic continent at depths down to about . Description ''Aporocidaris incerta'' has a compressed test, the height of which is less than half its diameter, which is a maximum of . The primary spines are as long as the test is wide. When preserved, this species is dark brown. See also * Aporocidaris eltaniana * Aporocidaris fragilis ''Aporocidaris fragilis'' is a species of sea urchin of the family Ctenocidaridae. It is well-armoured with spines. It is placed in the genus Aporocidaris and lives in the sea. ''Aporocidaris fragilis'' was first scientifically descri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aporocidaris Milleri
''Aporocidaris milleri'' is a species of sea urchin of the family Ctenocidaridae. Their armour is covered with spines. It is placed in the genus Aporocidaris and lives in the sea. Aporocidaris milleri was first scientifically described in 1898 by Alexander Emanuel Agassiz.Kroh, A. (2010). ''Aporocidaris milleri'' (Alexander Emanuel Agassiz, 1898). In: Kroh, A. & Mooi, R. (2010World Echinoidea Database at the World Register of Marine Species. See also * Aporocidaris fragilis * Aporocidaris incerta ''Aporocidaris incerta'' is a species of sea urchin of the family Ctenocidaridae. It is placed in the genus Aporocidaris and lives in the deep sea. ''Aporocidaris incerta'' was first scientifically described in 1902 by Koehler.Kroh, A. (2010). ... * Aporocidaris usarpi References Ctenocidaridae Animals described in 1898 {{echinoidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aporocidaris Usarpi
''Aporocidaris usarpi'' is a species of sea urchin of the family Ctenocidaridae. Their armour is covered with spines. It is placed in the genus Aporocidaris and lives in the sea. Aporocidaris usarpi was first scientifically described in 2000 by Mooi, David, Fell & Choné.Kroh, A. (2010). ''Aporocidaris usarpi'' (Mooi, David, Fell & Choné, 2000). In: Kroh, A. & Mooi, R. (2010World Echinoidea Database at the World Register of Marine Species. See also * Aporocidaris incerta * Aporocidaris milleri ''Aporocidaris milleri'' is a species of sea urchin of the family Ctenocidaridae. Their armour is covered with spines. It is placed in the genus Aporocidaris and lives in the sea. Aporocidaris milleri was first scientifically described in 1898 by ... * Arachnoides placenta References Ctenocidaridae Animals described in 2000 {{echinoidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
