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Chondrocidaris
''Chondrocidaris'' is a genus of sea urchins of the family Cidaridae described in 1863 by Alexander Agassiz. There are two living species and several fossil species dating as far back as the Miocene.Kroh, A. (2015)''Chondrocidaris'' A. Agassiz, 1863 In: Kroh, A. & Mooi, R. (2015) World Echinoidea Database. Accessed through: World Register of Marine Species on 2015-04-05. ;Living species: *'' Chondrocidaris brevispina'' (Clark Clark is an English language surname, ultimately derived from the Latin with historical links to England, Scotland, and Ireland ''clericus'' meaning "scribe", "secretary" or a scholar within a religious order, referring to someone who was educate ..., 1925) *'' Chondrocidaris gigantea'' ( Agassiz, 1863) Image:Chondrocidaris brevispina.jpg, '' Chondrocidaris brevispina'' Image:Reef0228.jpg, '' Chondrocidaris gigantea'' ;Extinct species: *'' Chondrocidaris clarkii'' *'' Chondrocidaris marianica'' *'' Chondrocidaris problepteryx'' References External ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chondrocidaris Clarkii
''Chondrocidaris'' is a genus of sea urchins of the family Cidaridae described in 1863 by Alexander Agassiz. There are two living species and several fossil species dating as far back as the Miocene.Kroh, A. (2015)''Chondrocidaris'' A. Agassiz, 1863 In: Kroh, A. & Mooi, R. (2015) World Echinoidea Database. Accessed through: World Register of Marine Species on 2015-04-05. ;Living species: *'' Chondrocidaris brevispina'' (Clark, 1925) *'' Chondrocidaris gigantea'' (Agassiz Jean Louis Rodolphe Agassiz ( ; ) FRS (For) FRSE (May 28, 1807 – December 14, 1873) was a Swiss-born American biologist and geologist who is recognized as a scholar of Earth's natural history. Spending his early life in Switzerland, he rec ..., 1863) Image:Chondrocidaris brevispina.jpg, '' Chondrocidaris brevispina'' Image:Reef0228.jpg, '' Chondrocidaris gigantea'' ;Extinct species: *'' Chondrocidaris clarkii'' *'' Chondrocidaris marianica'' *'' Chondrocidaris problepteryx'' References External ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chondrocidaris Marianica
''Chondrocidaris'' is a genus of sea urchins of the family Cidaridae described in 1863 by Alexander Agassiz. There are two living species and several fossil species dating as far back as the Miocene.Kroh, A. (2015)''Chondrocidaris'' A. Agassiz, 1863 In: Kroh, A. & Mooi, R. (2015) World Echinoidea Database. Accessed through: World Register of Marine Species on 2015-04-05. ;Living species: *'' Chondrocidaris brevispina'' (Clark, 1925) *'' Chondrocidaris gigantea'' (Agassiz, 1863) Image:Chondrocidaris brevispina.jpg, '' Chondrocidaris brevispina'' Image:Reef0228.jpg, '' Chondrocidaris gigantea'' ;Extinct species: *''Chondrocidaris clarkii ''Chondrocidaris'' is a genus of sea urchins of the family Cidaridae described in 1863 by Alexander Agassiz. There are two living species and several fossil species dating as far back as the Miocene.Kroh, A. (2015)''Chondrocidaris'' A. Agassiz, ...'' *'' Chondrocidaris marianica'' *'' Chondrocidaris problepteryx'' References External l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chondrocidaris Problepteryx
''Chondrocidaris'' is a genus of sea urchins of the family Cidaridae described in 1863 by Alexander Agassiz. There are two living species and several fossil species dating as far back as the Miocene.Kroh, A. (2015)''Chondrocidaris'' A. Agassiz, 1863 In: Kroh, A. & Mooi, R. (2015) World Echinoidea Database. Accessed through: World Register of Marine Species on 2015-04-05. ;Living species: *'' Chondrocidaris brevispina'' (Clark, 1925) *'' Chondrocidaris gigantea'' (Agassiz, 1863) Image:Chondrocidaris brevispina.jpg, '' Chondrocidaris brevispina'' Image:Reef0228.jpg, '' Chondrocidaris gigantea'' ;Extinct species: *''Chondrocidaris clarkii'' *''Chondrocidaris marianica ''Chondrocidaris'' is a genus of sea urchins of the family Cidaridae described in 1863 by Alexander Agassiz. There are two living species and several fossil species dating as far back as the Miocene.Kroh, A. (2015)''Chondrocidaris'' A. Agassiz, ...'' *'' Chondrocidaris problepteryx'' References External li ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chondrocidaris Brevispina
''Chondrocidaris brevispina'', the raspberry sea urchin, is a species of sea urchins of the family Cidaridae. Their armour is covered with short, conical spines. ''Chondrocidaris brevispina'' was first scientifically described in 1925 by Hubert Lyman Clark.Kroh, A. (2010). ''Chondrocidaris brevispina'' (Hubert Lyman Clark, 1925). In: Kroh, A. & Mooi, R. (2010World Echinoidea Database at the 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 specialist .... References Animals described in 1925 Cidaridae Taxa named by Hubert Lyman Clark {{Echinoidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chondrocidaris Gigantea
''Chondrocidaris gigantea'' is a species of sea urchin of the family Cidaridae. Their armour is covered with spines. ''Chondrocidaris gigantea'' was first scientifically described in 1863 by Alexander Agassiz.Kroh, A. (2010). ''Chondrocidaris gigantea'' (Agassiz, 1863). In: Kroh, A. & Mooi, R. (2010World Echinoidea Database at the 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 specialist .... References Animals described in 1863 Cidaridae Taxa named by Alexander Agassiz {{Echinoidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cidaridae
Cidaridae is a family of sea urchins in the order Cidaroida. Description and characteristics Cidarid sea urchins are characterized by their stout skeleton : the test is thick and hard, with massive perforated tubercles (never crenulated) surrounded by a crown of secondary tubercles, but no primary tubercles in the interambulacra regions. These tubercles hold massive spines, thick, strong and often very long, and showing sometimes odd shapes (thorny spines, fans, clubs, Christmas trees...). The order Cidaroida is the basalmost of current sea urchins, and most of the species included in this family are abyssal, even if a handful of species remain quite common in tropical shallow waters, like ''Eucidaris'' or ''Phyllacanthus''. Genera According to the World Register of Marine Species (WoRMS), the following genera are included in this family * Subfamily '' Cidarinae'' (Mortensen, 1928a) ** Genus ''Calocidaris'' (H.L. Clark, 1907) ** Genus '' Centrocidaris'' (A. Agassiz, 1904) * ... [...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] |
Species
In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. Other ways of defining species include their karyotype, DNA sequence, morphology, behaviour or ecological niche. In addition, paleontologists use the concept of the chronospecies since fossil reproduction cannot be examined. The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million. However, only about 14% of these had been described by 2011. All species (except viruses) are given a two-part name, a "binomial". The first part of a binomial is the genus to which the species belongs. The second part is called the specific name or the specific epithet (in botanical nomenclature, also sometimes i ... [...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] |
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] |
Miocene
The Miocene ( ) is the first geological epoch of the Neogene Period and extends from about (Ma). The Miocene was named by Scottish geologist Charles Lyell; the name comes from the Greek words (', "less") and (', "new") and means "less recent" because it has 18% fewer modern marine invertebrates than the Pliocene has. The Miocene is preceded by the Oligocene and is followed by the Pliocene. As Earth went from the Oligocene through the Miocene and into the Pliocene, the climate slowly cooled towards a series of ice ages. The Miocene boundaries are not marked by a single distinct global event but consist rather of regionally defined boundaries between the warmer Oligocene and the cooler Pliocene Epoch. During the Early Miocene, the Arabian Peninsula collided with Eurasia, severing the connection between the Mediterranean and Indian Ocean, and allowing a faunal interchange to occur between Eurasia and Africa, including the dispersal of proboscideans into Eurasia. During the ... [...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] |
