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Acodontaster Hodgsoni
''Acodontaster'' is a genus of starfish in the family Odontasteridae. Members of the genus are found in the Southern Ocean, in the waters off Antarctica and the island groups nearby. ''Acodontaster elongatus'' is additionally found further north in the Atlantic Ocean on the eastern seaboard of South America. Species The following species are listed in the World Register of Marine Species: *'' Acodontaster capitatus'' (Koehler, 1912) *''Acodontaster conspicuus ''Acodontaster conspicuus'' is a species of starfish in the family Odontasteridae. It is found in the Southern Ocean, in the waters off Antarctica and the island groups nearby. Description ''Acodontaster conspicuus'' grows to about 30 cm ( ...'' (Koehler, 1920) *'' Acodontaster elongatus'' (Sladen, 1889) *'' Acodontaster hodgsoni'' (Bell, 1908) *'' Acodontaster marginatus'' (Koehler, 1912) References Odontasteridae {{Asteroidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Addison Emery Verrill
Addison Emery Verrill (February 9, 1839 – December 10, 1926) was an American invertebrate zoologist, museum curator and university professor. Life Verrill was born on February 9, 1839 in Greenwood, Maine, the son of George Washington Verrill and Lucy (Hillborn) Verrill. As a boy he showed an early interest in natural history, building collections of rocks and minerals, plants, shells, insects and other animals. When he moved with his family to Norway, Maine at age fourteen he attended secondary school at the Norway Liberal Institute. Verrill started college in 1859 at Harvard University and studied under Louis Agassiz. He graduated in 1862 with a B.A. He went on scientific collecting trips with Alpheus Hyatt and Nathaniel Shaler in the summer of 1860 to Trenton Point, Maine and Mount Desert Island and in the summer of 1861 to Anticosti Island and Labrador. In 1864 Verrill made reports on mining, or prospective mining, properties in New Hampshire, New York, and Pennsylvani ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below 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 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. phylogenetic analysis should c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Starfish
Starfish or sea stars are star-shaped echinoderms belonging to the class Asteroidea (). Common usage frequently finds these names being also applied to ophiuroids, which are correctly referred to as brittle stars or basket stars. Starfish are also known as asteroids due to being in the class Asteroidea. About 1,900 species of starfish live on the seabed in all the world's oceans, from warm, tropical zones to frigid, polar regions. They are found from the intertidal zone down to abyssal depths, at below the surface. Starfish are marine invertebrates. They typically have a central disc and usually five arms, though some species have a larger number of arms. The aboral or upper surface may be smooth, granular or spiny, and is covered with overlapping plates. Many species are brightly coloured in various shades of red or orange, while others are blue, grey or brown. Starfish have tube feet operated by a hydraulic system and a mouth at the centre of the oral or lower su ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Family (biology)
Family ( la, familia, plural ') is one of the eight major hierarchical taxonomic ranks in Linnaean taxonomy. It is classified between order and genus. A family may be divided into subfamilies, which are intermediate ranks between the ranks of family and genus. The official family names are Latin in origin; however, popular names are often used: for example, walnut trees and hickory trees belong to the family Juglandaceae, but that family is commonly referred to as the "walnut family". What belongs to a family—or if a described family should be recognized at all—are proposed and determined by practicing taxonomists. There are no hard rules for describing or recognizing a family, but in plants, they can be characterized on the basis of both vegetative and reproductive features of plant species. Taxonomists often take different positions about descriptions, and there may be no broad consensus across the scientific community for some time. The publishing of new data and opi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Odontasteridae
Odontasteridae is a family of sea stars. Members of the family are known as cushion stars and have relatively broad discs and five short tapering arms. Genera The following genera are listed in the World Register of Marine Species: *'' Acodontaster'' Verrill, 1899 *'' Diabocilla'' McKnight, 2006 *'' Diplodontias'' Fisher, 1908 *'' Eurygonias'' Farquhar, 1913 *'' Hoplaster'' Perrier, in Milne-Edwards, 1882 *''Odontaster ''Odontaster'' is a genus of sea stars. The type species is ''Odontaster hispidus''. Species The following species are listed in the World Register of Marine Species: *'' Odontaster aucklandensis'' McKnight, 1973 *'' Odontaster australis'' H.L. ...'' Verrill, 1880 References Echinoderm families {{Asteroidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Southern Ocean
The Southern Ocean, also known as the Antarctic Ocean, comprises the southernmost waters of the World Ocean, generally taken to be south of 60° S latitude and encircling Antarctica. With a size of , it is regarded as the second-smallest of the five principal oceanic divisions: smaller than the Pacific, Atlantic, and Indian oceans but larger than the Arctic Ocean. Over the past 30 years, the Southern Ocean has been subject to rapid climate change, which has led to changes in the marine ecosystem. By way of his voyages in the 1770s, James Cook proved that waters encompassed the southern latitudes of the globe. Since then, geographers have disagreed on the Southern Ocean's northern boundary or even existence, considering the waters as various parts of the Pacific, Atlantic, and Indian oceans, instead. However, according to Commodore John Leech of the International Hydrographic Organization (IHO), recent oceanographic research has discovered the importance of Southe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antarctica
Antarctica () is Earth's southernmost and least-populated continent. Situated almost entirely south of the Antarctic Circle and surrounded by the Southern Ocean, it contains the geographic South Pole. Antarctica is the fifth-largest continent, being about 40% larger than Europe, and has an area of . Most of Antarctica is covered by the Antarctic ice sheet, with an average thickness of . Antarctica is, on average, the coldest, driest, and windiest of the continents, and it has the highest average elevation. It is mainly a polar desert, with annual precipitation of over along the coast and far less inland. About 70% of the world's freshwater reserves are frozen in Antarctica, which, if melted, would raise global sea levels by almost . Antarctica holds the record for the lowest measured temperature on Earth, . The coastal regions can reach temperatures over in summer. Native species of animals include mites, nematodes, penguins, seals and tardigrades. Where ve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acodontaster Capitatus
''Acodontaster'' is a genus of starfish in the family Odontasteridae. Members of the genus are found in the Southern Ocean, in the waters off Antarctica and the island groups nearby. ''Acodontaster elongatus'' is additionally found further north in the Atlantic Ocean on the eastern seaboard of South America. Species The following species are listed in the World Register of Marine Species: *'' Acodontaster capitatus'' (Koehler, 1912) *''Acodontaster conspicuus'' (Koehler, 1920) *'' Acodontaster elongatus'' (Sladen, 1889) *''Acodontaster hodgsoni ''Acodontaster'' is a genus of starfish in the family Odontasteridae. Members of the genus are found in the Southern Ocean, in the waters off Antarctica and the island groups nearby. ''Acodontaster elongatus'' is additionally found further north ...'' (Bell, 1908) *'' Acodontaster marginatus'' (Koehler, 1912) References Odontasteridae {{Asteroidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acodontaster Conspicuus
''Acodontaster conspicuus'' is a species of starfish in the family Odontasteridae. It is found in the Southern Ocean, in the waters off Antarctica and the island groups nearby. Description ''Acodontaster conspicuus'' grows to about 30 cm (12 in) in diameter. It has 5 arms and the body has a cushion-like appearance, being thick except around the margins where there is a thin flat area. The upper surface has radially arranged granulations. The colour varies but is usually orange or brown.Acodontaster conspicuus (Koehler, 1920) Antarctic Field Guide. Retrieved 2011-11-27. Distribution ''Acodontaster conspicuus'' is found in the cold seas around Antarctica, including the |
Acodontaster Elongatus
''Acodontaster'' is a genus of starfish in the family Odontasteridae. Members of the genus are found in the Southern Ocean, in the waters off Antarctica and the island groups nearby. ''Acodontaster elongatus'' is additionally found further north in the Atlantic Ocean on the eastern seaboard of South America. Species The following species are listed in the World Register of Marine Species: *''Acodontaster capitatus'' (Koehler, 1912) *''Acodontaster conspicuus'' (Koehler, 1920) *'' Acodontaster elongatus'' (Sladen, 1889) *''Acodontaster hodgsoni ''Acodontaster'' is a genus of starfish in the family Odontasteridae. Members of the genus are found in the Southern Ocean, in the waters off Antarctica and the island groups nearby. ''Acodontaster elongatus'' is additionally found further north ...'' (Bell, 1908) *'' Acodontaster marginatus'' (Koehler, 1912) References Odontasteridae {{Asteroidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acodontaster Hodgsoni
''Acodontaster'' is a genus of starfish in the family Odontasteridae. Members of the genus are found in the Southern Ocean, in the waters off Antarctica and the island groups nearby. ''Acodontaster elongatus'' is additionally found further north in the Atlantic Ocean on the eastern seaboard of South America. Species The following species are listed in the World Register of Marine Species: *'' Acodontaster capitatus'' (Koehler, 1912) *''Acodontaster conspicuus ''Acodontaster conspicuus'' is a species of starfish in the family Odontasteridae. It is found in the Southern Ocean, in the waters off Antarctica and the island groups nearby. Description ''Acodontaster conspicuus'' grows to about 30 cm ( ...'' (Koehler, 1920) *'' Acodontaster elongatus'' (Sladen, 1889) *'' Acodontaster hodgsoni'' (Bell, 1908) *'' Acodontaster marginatus'' (Koehler, 1912) References Odontasteridae {{Asteroidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acodontaster Marginatus
''Acodontaster'' is a genus of starfish in the family Odontasteridae. Members of the genus are found in the Southern Ocean, in the waters off Antarctica and the island groups nearby. ''Acodontaster elongatus'' is additionally found further north in the Atlantic Ocean on the eastern seaboard of South America. Species The following species are listed in the World Register of Marine Species: *''Acodontaster capitatus'' (Koehler, 1912) *''Acodontaster conspicuus'' (Koehler, 1920) *''Acodontaster elongatus'' (Sladen, 1889) *''Acodontaster hodgsoni ''Acodontaster'' is a genus of starfish in the family Odontasteridae. Members of the genus are found in the Southern Ocean, in the waters off Antarctica and the island groups nearby. ''Acodontaster elongatus'' is additionally found further north ...'' (Bell, 1908) *'' Acodontaster marginatus'' (Koehler, 1912) References Odontasteridae {{Asteroidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
