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Spatangidae
The Spatangidae are a family of heart urchin 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 urch ...s. There are three recognised genera within the family; '' Granopatagus'', '' Plethotaenia'', and '' Spatangus''. Additionally, ''Prospatangus'' was previously a recognised genus within the Spatangidae, but is now accepted as part of the genus ''Spatangus''. The Spatangidae are marine heart urchins that feed on subsurface deposits and graze. References Spatangoida Echinoderm families {{echinoidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spatangidae
The Spatangidae are a family of heart urchin 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 urch ...s. There are three recognised genera within the family; '' Granopatagus'', '' Plethotaenia'', and '' Spatangus''. Additionally, ''Prospatangus'' was previously a recognised genus within the Spatangidae, but is now accepted as part of the genus ''Spatangus''. The Spatangidae are marine heart urchins that feed on subsurface deposits and graze. References Spatangoida Echinoderm families {{echinoidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spatangus
''Spatangus'' is a genus of heart urchins in the Spatangidae family.Hansson, H. (2009)Spatangus Gray, 1825 Accessed through the World Register of Marine Species on 2 August 2010 The genus is synonymous with the previously recognised genera ''Prospatangus'' Lambert, 1902 and ''Spatagus''. There are nine recognised species. The type species is ''Spatangus purpureus'' Müller, 1776 by subsequent designation (Rowe & Gates, 1995). ''Spatangus'' comprises marine heart urchins that feed on subsurface deposits and graze. Fossil of heart urchins of this genus have been found in the sediments of Europe, United States, Egypt and Australia from Cretaceous to Pliocene (age range: 85.8 to 2.588 Ma). Species Species within this genus include: * '' Spatangus altus'' Mortensen, 1907 * '' Spatangus baixadoleitensis'' Maury, 1934a † * '' Spatangus beryl'' Fell, 1963 * '' Spatangus brissus'' * '' Spatangus californicus'' H.L. Clark, 1917 * '' Spatangus capensis'' Döderlein, 1905 * '' Spat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heart Urchin
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 ... [...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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spatangus Purpureus
''Spatangus purpureus'', commonly known as the purple heart urchin, is a species of sea urchin in the family Spatangidae. It is found in the eastern Atlantic Ocean and the Mediterranean Sea, where it lives immersed in the sediment. Description ''Spatangus purpureus'' has a somewhat flattened Test (biology), test with a flat oral surface (underside) and a domed aboral surface (upper side). It is an irregular animal and not radially symmetric as are most sea urchins; there is a notch at the front and the mouth is forward pointing, while the anus is at the rear. It can grow to a length of and a width of . The test is reddish-purple and there are two types of spines, many short, silky, purplish spines up to long, and fewer beige chitinous spines long. Distribution and habitat ''Spatangus purpureus'' is native to the eastern Atlantic Ocean, the Mediterranean Sea and the English Channel. Its range extends from Iceland and the North Cape (Norway), North Cape in Norway southwards to S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Deposit Feeder
Detritivores (also known as detrivores, detritophages, detritus feeders, or detritus eaters) are heterotrophs that obtain nutrients by consuming detritus (decomposing plant and animal parts as well as feces). There are many kinds of invertebrates, vertebrates and plants that carry out coprophagy. By doing so, all these detritivores contribute to decomposition and the nutrient cycles. They should be distinguished from other decomposers, such as many species of bacteria, fungi and protists, which are unable to ingest discrete lumps of matter, but instead live by absorbing and metabolizing on a molecular scale (saprotrophic nutrition). The terms ''detritivore'' and ''decomposer'' are often used interchangeably, but they describe different organisms. Detritivores are usually arthropods and help in the process of remineralization. Detritivores perform the first stage of remineralization, by fragmenting the dead plant matter, allowing decomposers to perform the second stage of remineraliz ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grazing
In agriculture, grazing is a method of animal husbandry whereby domestic livestock are allowed outdoors to roam around and consume wild vegetations in order to convert the otherwise indigestible (by human gut) cellulose within grass and other forages into meat, milk, wool and other animal products, often on land unsuitable for arable farming. Farmers may employ many different strategies of grazing for optimum production: grazing may be continuous, seasonal, or rotational within a grazing period. Longer rotations are found in ley farming, alternating arable and fodder crops; in rest rotation, deferred rotation, and mob grazing, giving grasses a longer time to recover or leaving land fallow. Patch-burn sets up a rotation of fresh grass after burning with two years of rest. Conservation grazing proposes to use grazing animals to improve the biodiversity of a site, but studies show that the greatest benefit to biodiversity comes from removing grazing animals from the landscape. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
