Echinus (sea Urchin)
''Echinus'' is a genus of 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 ...s. Species Species in this genus include: Fossils * '' Echinus coglesi'' * '' Echinus dixoni'' * '' Echinus etheridgei'' * '' Echinus lamarcki'' * '' Echinus multicostatus'' * '' Echinus nodulosus'' * '' Echinus paucimiliaris'' * '' Echinus sphaeroides'' * '' Echinus woodi'' References {{echinoidea-stub ...
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Echinus Esculentus
''Echinus esculentus'', the European edible sea urchin or common sea urchin, is a species of marine invertebrate in the Echinidae family. It is found in coastal areas of western Europe down to a depth of . It is considered "Near threatened" in the IUCN Red List of Threatened Species. Description ''E. esculentus'' is approximately spherical but slightly flattened at both poles. It is reddish or purplish with white tubercles and grows to about ten centimetres in diameter. The brittle, limy test is rigid and divided into five ambulacral areas separated by five inter-ambulacral areas. There are two rows of plates in each of these areas, making twenty rows of plates in total. The test is covered in spines each articulating with a tubercle. There is a dense covering of secondary spines and a smaller number of longer, primary spines, carried on each second or third ambulacral plate. The spines are blunt ended and usually white with purplish tips. There is a radially symmetrical patter ...
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Ole Theodor Jensen Mortensen
Ole Theodor Jensen Mortensen, also known as Theodor Mortensen (22 February 1868 – 3 April 1952) was a Danish scientist and professor at the Zoological Museum, Copenhagen. He specialized in 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 ...s (Echinoidea) and provided an enormous marine collection to the museum. He collected many sea urchin species on his expeditions between 1899–1930.Mortensen
Echinoids.nl Mortensen is the author of ''A Monograph of the echinoidea'' and ''Report on the echinoidea collected by the United States fisheries steamer "Albatross" during the Philippine expedition, 1907–1910''. ...
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Echinus Sphaeroides
Echinus may refer to: * Echinus (Acarnania), a town in ancient Acarnania, Greece * Echinus (Thessaly), a town in ancient Thessaly, Greece; also a Roman Catholic titular bishopric * Echinus (molding), a molding similar to the ovolo * ''Echinus'' (sea urchin), a genus of animals * ''Echinus'' (plant), a synonym for the plant genus ''Mallotus ''Mallotus'' may refer to: * ''Mallotus'' (fish), a fish genus in the family Osmeridae * ''Mallotus'' (plant), a plant genus in the family Euphorbiaceae {{genus disambiguation ...

Echinus Paucimiliaris
Echinus may refer to: * Echinus (Acarnania), a town in ancient Acarnania, Greece * Echinus (Thessaly), a town in ancient Thessaly, Greece; also a Roman Catholic titular bishopric * Echinus (molding), a molding similar to the ovolo * ''Echinus'' (sea urchin), a genus of animals * ''Echinus'' (plant), a synonym for the plant genus ''Mallotus ''Mallotus'' may refer to: * ''Mallotus'' (fish), a fish genus in the family Osmeridae * ''Mallotus'' (plant), a plant genus in the family Euphorbiaceae {{genus disambiguation ...

Echinus Nodulosus
Echinus may refer to: * Echinus (Acarnania), a town in ancient Acarnania, Greece * Echinus (Thessaly), a town in ancient Thessaly, Greece; also a Roman Catholic titular bishopric * Echinus (molding), a molding similar to the ovolo * ''Echinus'' (sea urchin), a genus of animals * ''Echinus'' (plant), a synonym for the plant genus ''Mallotus ''Mallotus'' may refer to: * ''Mallotus'' (fish), a fish genus in the family Osmeridae * ''Mallotus'' (plant), a plant genus in the family Euphorbiaceae {{genus disambiguation ...

Echinus Multicostatus
Echinus may refer to: * Echinus (Acarnania), a town in ancient Acarnania, Greece * Echinus (Thessaly), a town in ancient Thessaly, Greece; also a Roman Catholic titular bishopric * Echinus (molding), a molding similar to the ovolo * ''Echinus'' (sea urchin), a genus of animals * ''Echinus'' (plant), a synonym for the plant genus ''Mallotus ''Mallotus'' may refer to: * ''Mallotus'' (fish), a fish genus in the family Osmeridae * ''Mallotus'' (plant), a plant genus in the family Euphorbiaceae {{genus disambiguation ...

Echinus Lamarcki
Echinus may refer to: * Echinus (Acarnania), a town in ancient Acarnania, Greece * Echinus (Thessaly), a town in ancient Thessaly, Greece; also a Roman Catholic titular bishopric * Echinus (molding), a molding similar to the ovolo * ''Echinus'' (sea urchin), a genus of animals * ''Echinus'' (plant), a synonym for the plant genus ''Mallotus ''Mallotus'' may refer to: * ''Mallotus'' (fish), a fish genus in the family Osmeridae * ''Mallotus'' (plant), a plant genus in the family Euphorbiaceae {{genus disambiguation ...

Echinus Etheridgei
Echinus may refer to: * Echinus (Acarnania), a town in ancient Acarnania, Greece * Echinus (Thessaly), a town in ancient Thessaly, Greece; also a Roman Catholic titular bishopric * Echinus (molding), a molding similar to the ovolo * ''Echinus'' (sea urchin), a genus of animals * ''Echinus'' (plant), a synonym for the plant genus ''Mallotus ''Mallotus'' may refer to: * ''Mallotus'' (fish), a fish genus in the family Osmeridae * ''Mallotus'' (plant), a plant genus in the family Euphorbiaceae {{genus disambiguation ...

Echinus Dixoni
Echinus may refer to: * Echinus (Acarnania), a town in ancient Acarnania, Greece * Echinus (Thessaly), a town in ancient Thessaly, Greece; also a Roman Catholic titular bishopric * Echinus (molding), a molding similar to the ovolo * ''Echinus'' (sea urchin), a genus of animals * ''Echinus'' (plant), a synonym for the plant genus ''Mallotus ''Mallotus'' may refer to: * ''Mallotus'' (fish), a fish genus in the family Osmeridae * ''Mallotus'' (plant), a plant genus in the family Euphorbiaceae {{genus disambiguation ...

Echinus Coglesi
Echinus may refer to: * Echinus (Acarnania), a town in ancient Acarnania, Greece * Echinus (Thessaly), a town in ancient Thessaly, Greece; also a Roman Catholic titular bishopric * Echinus (molding), a molding similar to the ovolo * ''Echinus'' (sea urchin), a genus of animals * ''Echinus'' (plant), a synonym for the plant genus ''Mallotus ''Mallotus'' may refer to: * ''Mallotus'' (fish), a fish genus in the family Osmeridae * ''Mallotus'' (plant), a plant genus in the family Euphorbiaceae {{genus disambiguation ...

Echinus Wallisi
Echinus may refer to: * Echinus (Acarnania), a town in ancient Acarnania, Greece * Echinus (Thessaly), a town in ancient Thessaly, Greece; also a Roman Catholic titular bishopric * Echinus (molding), a molding similar to the ovolo * ''Echinus'' (sea urchin), a genus of animals * ''Echinus'' (plant), a synonym for the plant genus ''Mallotus ''Mallotus'' may refer to: * ''Mallotus'' (fish), a fish genus in the family Osmeridae * ''Mallotus'' (plant), a plant genus in the family Euphorbiaceae {{genus disambiguation ...

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 ...
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