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Arbacioida
Arbacioida are an order (biology), order of sea urchins, consisting of a single extant family, the Arbaciidae. They are distinguished from other sea urchins by the presence of five separate plates around the anus. Unlike their close relatives, the Salenioida, all of the tubercles on their tests are of similar size. This order includes about 50 species (roughly 24 extant) divided into 14 genera: *''Arbacia'' Gray, 1835 *''Arbaciella'' Mortensen, 1910 *''Arbia (echinoderm), Arbia'' Cooke, 1948† *''Baueria'' Noetling, 1885† *''Codiopsis'' Louis Agassiz, Agassiz, in Agassiz & Desor, 1846† *''Coelopleurus'' Louis Agassiz, Agassiz, 1840a *''Cottaldia'' Desor, 1856 † *''Dialithocidaris'' Alexander Agassiz, Agassiz, 1898 *''Habrocidaris'' Alexander Agassiz, Agassiz & Clark, 1907b *''Hattopsis'' *''Podocidaris'' Alexander Agassiz, Agassiz, 1869 *''Pygmaeocidaris'' Ludwig Heinrich Philipp Döderlein, Döderlein, 1905 *''Sexpyga'' Shigei, 1975 *''Tetrapygus'' Louis Agassiz, Agassiz, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arbacia
''Arbacia'' is a genus of sea urchins, widespread in the Atlantic and eastern Pacific oceans. Species According to the World Register of Marine Species this genus includes the following species: * '' Arbacia abiquaensis'' Linder, Durham & Orr, 1988 † * '' Arbacia crenulata'' Kier, 1963 † (Miocene, east coast of USA) * '' Arbacia dufresnii'' ( Blainville, 1825) (Patagonia and Antarctica) * '' Arbacia lixula'' (Linnaeus, 1758) (Mediterranean) * '' Arbacia nigra'' Molina, 1782 * '' Arbacia punctulata'' (Lamarck, 1816) (Caribbean) * '' Arbacia rivuli'' Cooke, 1941a † (Pliocene, east coast of USA) * '' Arbacia spatuligera'' (Valenciennes, 1846) (Peru and Chile) * '' Arbacia stellata'' ( Blainville, 1825; ?Gmelin, 1788) (East Pacific) * '' Arbacia waccamaw'' Cooke, 1941a † (Pliocene The Pliocene ( ; also Pleiocene) is the epoch (geology), epoch in the geologic time scale that extends from 5.33 to 2.58 [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arbaciella
''Arbaciella'' is a genus of echinoderms An echinoderm () is any animal of the phylum Echinodermata (), which includes starfish, brittle stars, sea urchins, sand dollars and sea cucumbers, as well as the sessile sea lilies or "stone lilies". While bilaterally symmetrical as larv ... belonging to the family Arbaciidae. Species: *'' Arbaciella elegans'' *'' Arbaciella regularis'' References Arbacioida Echinoidea genera {{echinoidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coelopleurus
''Coelopleurus'' is an extant genus of echinoids with fossil records dating back to the Eocene, with remains found in Europe and North America. Characteristics These abyssal sea urchins are characterized by their surprisingly bright color pattern, usually red and white. Even more surprisingly, their tests (skeletons) are brightly colored, too, even after drying, or sometimes fossilization.. Species According to World Register of Marine Species: * ''Coelopleurus australis'' H.L. Clark, 1916 * ''Coelopleurus carolinensis'' Cooke, 1941a † * ''Coelopleurus castroi'' Maury, 1930 † * ''Coelopleurus exquisitus'' Coppard & Schultz, 2006 * ''Coelopleurus floridanus'' Alexander Agassiz, Agassiz, 1872 * ''Coelopleurus granulatus'' Ole Theodor Jensen Mortensen, Mortensen, 1934 * ''Coelopleurus interruptus'' Ludwig Heinrich Philipp Döderlein, Döderlein, 1910 * ''Coelopleurus longicollis'' Alexander Agassiz, Agassiz & H.L. Clark, 1908 * ''Coelopleurus maculatus'' Alexander Agassiz, A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sea Urchin
Sea urchins or urchins () are echinoderms in the class (biology), class Echinoidea. About 950 species live on the seabed, inhabiting all oceans and depth zones from the intertidal zone to deep seas of . They typically have a globular body covered by a spine (zoology), spiny protective test (biology), tests (hard shells), typically from across. Sea urchins move slowly, crawling with their tube feet, and sometimes pushing themselves with their spines. They feed primarily on algae but also eat slow-moving or sessility (motility), sessile animals such as crinoids and sponges. Their predators include sharks, sea otters, starfish, wolf eels, and triggerfish. Like all echinoderms, adult sea urchins have pentagonal symmetry with their Echinoderm#Larval development, pluteus larvae featuring Bilateral symmetry, bilateral (mirror) symmetry; The latter indicates that they belong to the Bilateria, along with chordates, arthropods, annelids and molluscs. Sea urchins are found in every ocea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Order (biology)
Order () is one of the eight major hierarchical taxonomic ranks in Linnaean taxonomy. It is classified between family and class. In biological classification, the order is a taxonomic rank used in the classification of organisms and recognized by the nomenclature codes. An immediately higher rank, superorder, is sometimes added directly above order, with suborder directly beneath order. An order can also be defined as a group of related families. What does and does not belong to each order is determined by a taxonomist, as is whether a particular order should be recognized at all. Often there is no exact agreement, with different taxonomists each taking a different position. There are no hard rules that a taxonomist needs to follow in describing or recognizing an order. Some taxa are accepted almost universally, while others are recognized only rarely. The name of an order is usually written with a capital letter. For some groups of organisms, their orders may follow consist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hattopsis
''Hattopsis'' is a genus of echinoid in the family Arbaciidae. It was described in 1992 from specimens in the UAE. There were 2 species described, though one was moved to another genus: ''Hattopsis paucituberculatus'' (now in genus '' Noetlingaster'' as '' Noetlingaster monotuberculatus'') and ''Hattopsis sphericus'', both are known from the late maastrichtian The Maastrichtian ( ) is, in the International Commission on Stratigraphy (ICS) geologic timescale, the latest age (geology), age (uppermost stage (stratigraphy), stage) of the Late Cretaceous epoch (geology), Epoch or Upper Cretaceous series (s .... Another species, Hattopsis muradi, was described in 2024. References {{taxonbar, from1=Q124334692, from2=Q124356130 Echinoida Fossil taxa described in 1992 Prehistoric Echinozoa genera Maastrichtian genera Paleontology in the United Arab Emirates ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tetrapygus
''Tetrapygus'' is a genus of sea urchins in the family Arbaciidae. It is a monotypic genus and the only species is ''Tetrapygus niger'' which was first described by the Chilean naturalist Juan Ignacio Molina in 1782. It is found in the southeastern Pacific Ocean on the coasts of South America. Description The oral (under) surface of the test is flattened while the aboral (upper) surface is shallowly domed. There is a small apical disc and the ambulacral areas are straight. There are up to five large primary tubercles in rows in the inter-ambulacral areas, interspersed with smaller secondary tubercles. The mouth is surrounded by a sunken subpentagonal peristome which is half as wide as the test. The primary spines are moderately long while the secondary spines are short. The colour of this sea urchin is purplish-black. Distribution ''T. niger'' is found in the southeastern Pacific Ocean on the coasts of Peru and Chile, its range extending from northern Peru to the Strait of Mage ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ludwig Heinrich Philipp Döderlein
Ludwig Heinrich Philipp Döderlein (3 March 1855, Bad Bergzabern – 23 April 1936, Munich) was a German zoologist. He specialized in echinoderms, particularly sea stars, sea urchins, and crinoids. He was one of the first European zoologists to have the opportunity to do research work in Japan from 1879 to 1881. Today, he is considered one of the most important pioneers of marine biological research in Japan. He was the director and curator of the Musée zoologique de la ville de Strasbourg from 1882 to 1919. He headed the Zoologische Staatssammlung München from 1923 to 1927 and was Professor of Zoology in the Ludwig Maximilian University of Munich. Biography Ludwig Döderlein was born in Bad Bergzabern, then Kingdom of Bavaria, on March 3, 1855. He went to school in Bayreuth from 1864 to 1873. From 1873 to 1875 he studied natural sciences in the University of Erlangen, where he also worked as an assistant to the Zoologist Emil Selenka in the summer of 1875. From 1875 to 1876 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
