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Echinocardium Australe (underside)
''Echinocardium australe'' is a sea urchin in the family, Loveniidae, first described by John Edward Gray in 1851, from specimens collected in Port Jackson and Tasmania. It is a synonym of ''Echinocardium cordatum ''Echinocardium cordatum'', also known as the common heart urchin or the sea potato, is a sea urchin in the family Loveniidae. It is found in sub-tidal regions in the NE Atlantic. Other un-named species have been identified as this species from t ...''. External links Lohrer, D, 2003Burrowing by heart urchins: an important function in soft-sediment ecosystems left, Underside view of test of ''Echinocardium australe'' References * Spatangoida Animals described in 1855 {{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 cuti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Edward Gray
John Edward Gray, Fellow of the Royal Society, FRS (12 February 1800 – 7 March 1875) was a British zoology, zoologist. He was the elder brother of zoologist George Robert Gray and son of the pharmacologist and botanist Samuel Frederick Gray (1766–1828). The same is used for a zoological name. Gray was Keeper of Zoology, keeper of zoology at the British Museum in London from 1840 until Christmas 1874, before the natural history holdings were split off to the Natural History Museum, London, Natural History Museum. He published several catalogues of the museum collections that included comprehensive discussions of animal groups and descriptions of new species. He improved the Zoological specimens, zoological collections to make them amongst the best in the world. Biography Gray was born in Walsall, but his family soon moved to London, where Gray studied medicine. He assisted his father in writing ''The Natural Arrangement of British Plants'' (1821). After being Blackballing, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Loveniidae
Loveniidae is a family of heart urchins in the order Spatangoida. Description and characteristics These sea urchins are called "heart urchins" due to their specific shape, looking like a heart when seen from below (more or less depending on the genus). The mouth is located between the two cheeks, and the anus below the tip. Genera According to the World Register of Marine Species: * genus '' Araeolampas'' Serafy, 1974 * genus '' Atelospatangus'' Koch, 1885 † * genus ''Breynia'' Desor, in Agassiz & Desor, 1847 * genus '' Chuniola'' Gagel, 1903 † * sub-family Echinocardiinae Cooke, 1942 ** genus ''Echinocardium'' Gray, 1825 * genus '' Gualtieria'' Desor, in Agassiz & Desor, 1847 † * genus '' Hemipatagus'' Desor, 1858 † * genus '' Laevipatagus'' Noetling, 1885 † * genus ''Lovenia'' Desor, in Agassiz & Desor, 1847 * genus '' Pseudolovenia'' A. Agassiz & H.L. Clark, 1907b * genus '' Semipetalion'' Szörényi, 1963 † * genus '' Spatangomorpha'' Boehm, 1882 † Image:Ech ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Echinocardium Cordatum
''Echinocardium cordatum'', also known as the common heart urchin or the sea potato, is a sea urchin in the family Loveniidae. It is found in sub-tidal regions in the NE Atlantic. Other un-named species have been identified as this species from temperate seas around the world. It lives buried in the sandy sea floor. Description The sea potato is a heart-shaped urchin clothed in a dense mat of furrowed yellowish spines which grow from tubercles and mostly point backwards. The upper surface is flattened and there is an indentation near the front. This urchin is a fawn colour but the tests that are found on the strandline have often lost their spines and are white. During life, the spines trap air which helps prevent asphyxiation for the buried urchin. The ambulacra form a broad furrow in a star shape extending down the sides of the test. There are two series each of two rows of tube feet. The test reaches from six to nine centimetres in length. Distribution The sea potato has a di ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Echinocardium Australe (underside)
''Echinocardium australe'' is a sea urchin in the family, Loveniidae, first described by John Edward Gray in 1851, from specimens collected in Port Jackson and Tasmania. It is a synonym of ''Echinocardium cordatum ''Echinocardium cordatum'', also known as the common heart urchin or the sea potato, is a sea urchin in the family Loveniidae. It is found in sub-tidal regions in the NE Atlantic. Other un-named species have been identified as this species from t ...''. External links Lohrer, D, 2003Burrowing by heart urchins: an important function in soft-sediment ecosystems left, Underside view of test of ''Echinocardium australe'' References * Spatangoida Animals described in 1855 {{echinoidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spatangoida
The heart urchins or Spatangoida are an order of sea urchins. Their body is a somewhat elongated oval in form, and is distinguished by the mouth being placed towards one end of the animal, and the anus towards the other. As a result, heart urchins, unlike most other sea urchins, are bilaterally symmetrical, and have a distinct anterior surface. The presence and position of the mouth and anus typically give members of this group the distinct "heart" shape from which they get their name. Heart urchins have no feeding lantern, and often have petaloids sunk into grooves. They are a relatively diverse order, with a number of varying species. Taxonomy According to World Register of Marine Species : * suborder Brissidina Stockley, Smith, Littlewood, Lessios & MacKenzie-Dodds, 2005 ** family Asterostomatidae Pictet, 1857 ** family Brissidae Gray, 1855 ** family Palaeotropidae Lambert, 1896 ** super-family Spatangidea Fischer, 1966 *** family Eupatagidae Lambert, 1905 *** family Eur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
