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Echinoida
Echinoida is an order of sea urchins in the class Echinoidea. They are distinguished from other sea urchins by simultaneously possessing both an un-sculpted test and a feeding lantern with large plates fused across the top of each pyramid. Taxonomy Order Echinoida * family Echinidae Gray, 1825 * family Echinometridae Gray, 1825 * family Parasaleniidae * family Strongylocentrotidae Gregory, 1900 Image:Paracentrotus lividus profil.JPG, ''Paracentrotus lividus'' ( Echinidae) Image:Echinometra lucunter.jpg, '' Echinometra lucunter'' ( Echinometridae) Image:Urchinhand 300.jpg, '' Strongylocentrotus franciscanus'' ( Strongylocentrotidae) See also *''Colobocentrotus atratus'' - Shingle urchin *'' Echinus acutus'' - White sea urchin *'' Echinus esculentus'' - Common sea urchin *'' Echinus tylodes'' *''Evechinus chloroticus'' - New Zealand sea urchin *'' Heterocentrotus mammillatus'' - Red pencil urchin *'' Heterocentrotus trigonarius'' - Slate pencil urchin *''Loxechinus albus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Echinoida
Echinoida is an order of sea urchins in the class Echinoidea. They are distinguished from other sea urchins by simultaneously possessing both an un-sculpted test and a feeding lantern with large plates fused across the top of each pyramid. Taxonomy Order Echinoida * family Echinidae Gray, 1825 * family Echinometridae Gray, 1825 * family Parasaleniidae * family Strongylocentrotidae Gregory, 1900 Image:Paracentrotus lividus profil.JPG, ''Paracentrotus lividus'' ( Echinidae) Image:Echinometra lucunter.jpg, '' Echinometra lucunter'' ( Echinometridae) Image:Urchinhand 300.jpg, '' Strongylocentrotus franciscanus'' ( Strongylocentrotidae) See also *''Colobocentrotus atratus'' - Shingle urchin *'' Echinus acutus'' - White sea urchin *'' Echinus esculentus'' - Common sea urchin *'' Echinus tylodes'' *''Evechinus chloroticus'' - New Zealand sea urchin *'' Heterocentrotus mammillatus'' - Red pencil urchin *'' Heterocentrotus trigonarius'' - Slate pencil urchin *''Loxechinus albus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Echinoidea
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 polar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Echinidae
Echinidae is a family of sea urchins in the order Echinoida. Members of the family are found in the Atlantic Ocean and the Antarctic.Family Echinidae Gray, 1825. The Echinoid Directory. Retrieved 2011-08-28. Characteristics Members of the family Echinidae are characterized by having trigeminate ambulacra (quadrigeminate in one genus) with pairs of pores arranged either as vertical arcs or as a dense band. The ambulacral plates are compound. The tubercles are imperforate and do not have crenulate edges. There are few tubercles on the interambulacral plates. The buccal notches are reduced in size and, their most significant distingu ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Colobocentrotus Atratus
''Colobocentrotus atratus'', the helmet urchin or shingle urchin, is a species of sea urchin in the family Echinometridae. In Hawaii it is known as "hāʻukeʻuke." It is found on wave-swept intertidal shores in the Indo-West Pacific, particularly on the shores of Hawaii. Description This urchin is a deep maroon colour and shaped like a domed limpet. It can grow to the size of a softball, but is usually much smaller. The upper surface is a mosaic of tiny polygonal plates formed from modified spines to form a smooth mosaic. This is fringed by a ring of large, flattened modified spines. On the underside there is another ring of smaller flattened spines and a large number of tube feet. Biology This urchin is usually found on substrates fully exposed to waves and their associated abrasive effect, often in groups. It feeds on periwinkles, other urchins and coralline algae Coralline algae are red algae in the order Corallinales. They are characterized by a thallus that is hard ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heterocentrotus Trigonarius
''Heterocentrotus trigonarius'', commonly known as the slate pencil urchin or red slate pencil urchin, is found in the tropical waters of the Indo-Pacific The Indo-Pacific is a vast biogeographic region of Earth. In a narrow sense, sometimes known as the Indo-West Pacific or Indo-Pacific Asia, it comprises the tropical waters of the Indian Ocean, the western and central Pacific Ocean, and the ... region. '' Heterocentrotus mamillatus'' is a similar, related species. References UC Berkeley Moorea Biocode listingWorld Register of Marine Species listing Heterocentrotus Animals described in 1816 {{echinoidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Echinus Tylodes
''Echinus tylodes'' is a species of sea urchin in the Echinidae family. It is white with rather sparse pink spines, and is endemic to the eastern coast of North America including the Gulf of Mexico. Description ''Echinus tylodes'' has a subglobular test about two-thirds as high as it is wide and grows to a diameter of . The joints between the ambulacral plates and the pores through which the tube feet project are both sunken below the general surface of the test. The tubercles to which the primary spines are attached are slightly raised, making it appear as if they are on vertical ridges. The primary spines are short and stout, and the test is easily visible as few secondary spines occur. The general colour of this urchin is white and it has pink spines. Distribution and habitat ''Echinus tylodes'' is found on the East Coast of the United States from Cape Cod southwards to the Straits of Florida and in the Gulf of Mexico. It is a deepwater species, being found at depths of . It ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gracilechinus Acutus
''Gracilechinus acutus'' is a species of sea urchin in the family Echinidae, commonly known as the white sea urchin. It is an omnivore and feeds on algae and small invertebrate Invertebrates are a paraphyletic group of animals that neither possess nor develop a vertebral column (commonly known as a ''backbone'' or ''spine''), derived from the notochord. This is a grouping including all animals apart from the chordate ...s. Description Gracilechinus acutus usually grow up to 150 mm in diameter in their adult stage. They appear commonly in a reddish to brown-red color with occasional urchins having a green color. There are vertical white stripes on the ambulacral plates. The Gracilechinus acutus have two types of spines, primary and secondary. Its primary spines are long and tapered while secondary spines are more short and thin. The spines act as a defense mechanism against predators. The area around the mouth does not contain spines, but instead have pedicellariae. Distrib ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Echinus Melo
''Echinus melo'', melon sea urchin, is a species of sea urchin in the family Echinidae. Description This species grows up to 17 cm (7 in) in diameter. It is spherical or slightly cone-shaped, and the colour of the test is mainly pinkish, yellowish, or greenish-yellow, and banded with white and pale brown, giving it a segmented appearance. The long primary spines are few in number and olive green with pale tips. They grow in a single row on each ambulacral plate. The much shorter secondary spines are yellowish green and are densely packed in several rows.''Echinus melo'' European Marine Life. Retrieved 2011-09-12. Distribution The melon sea urchin is found in the |
Strongylocentrotidae
The Strongylocentrotidae are a family Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. Idea ... of sea urchins in the order Echinoida. Genera References {{echinoidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paracentrotus Lividus
''Paracentrotus lividus'' is a species of sea urchin in the family Parechinidae commonly known as the purple sea urchin. It is the type species of the genus and occurs in the Mediterranean Sea and eastern Atlantic Ocean. Description ''Paracentrotus lividus'' has a circular, flattened greenish test with a diameter of up to seven centimetres. The test is densely clothed in long and sharply pointed spines that are usually purple but are occasionally other colours including dark brown, light brown and olive green. There are five or six pairs of pores on each ambulacral plate. The tube feet are in groups of 5 or 6, arranged in small arcs.Purple sea urchin - ''Paracentrotus lividus'' |
Echinometra Lucunter
''Echinometra lucunter'', the rock boring urchin, is a species of sea urchin in the family Echinometridae. It is found in very shallow parts of the western Atlantic Ocean and the Caribbean Sea. Description ''Echinometra lucunter'' has an elliptical rather than a round test (shell). It can grow to a diameter of about and grows larger at the extreme north and south ends of its range than it does in the centre. It has moderately short spines with wide bases and sharp tips. The colour of the test varies from black to deep brownish-red, often being more ruddy on its aboral (upper) surface than on its oral (lower) surface. The spines are usually black. Distribution and habitat ''Echinometra lucunter'' is common throughout the Caribbean Sea and also occurs in Florida, Bermuda and the South American coast as far south as Brazil. It occurs on shallow rocky areas and on coral reefs usually at depths of or less but occasionally in deeper water down to about . It is sometimes found am ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Order (biology)
Order ( la, wikt:ordo#Latin, ordo) is one of the eight major hierarchical taxonomic ranks in Linnaean taxonomy. It is classified between Family_(biology), family and Class_(biology), 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. Fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
