|
Echinothuriidae
The Echinothuriidae are a family of sea urchins in the order Echinothurioida. Due to their soft skeletons, most are called "leather urchins", but species in the genus '' Asthenosoma'' are also known as "fire urchins" due to their bright colors and painful, venomous sting. Description and characteristics These sea urchins have a disc-like body, more or less bulging, structured by a flexible test, which is nearly unique among sea urchins. Most species can grow quite big and live in deep seas, though some genera contain shallow species (especially '' Asthenosoma''). The test is composed of thin and weakly calcified plates, not always continuous. The spines are attached to perforated and uncrenulated tubercles. Spines from the oral face are ending with a hyaline hoof, which allows walking on soft substrate. The jaw (Aristotle's lantern) has five aulodont teeth. This family seems to have appeared at the end of the Cretaceous. Taxonomy The World Echinoidea Database recognises t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Echinothuriidae
The Echinothuriidae are a family of sea urchins in the order Echinothurioida. Due to their soft skeletons, most are called "leather urchins", but species in the genus '' Asthenosoma'' are also known as "fire urchins" due to their bright colors and painful, venomous sting. Description and characteristics These sea urchins have a disc-like body, more or less bulging, structured by a flexible test, which is nearly unique among sea urchins. Most species can grow quite big and live in deep seas, though some genera contain shallow species (especially '' Asthenosoma''). The test is composed of thin and weakly calcified plates, not always continuous. The spines are attached to perforated and uncrenulated tubercles. Spines from the oral face are ending with a hyaline hoof, which allows walking on soft substrate. The jaw (Aristotle's lantern) has five aulodont teeth. This family seems to have appeared at the end of the Cretaceous. Taxonomy The World Echinoidea Database recognises t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Araeosoma
''Araeosoma'' is a genus of deep-sea sea urchins in the family Echinothuriidae. Description and characteristics Species in this genus are distinguished from other Echinothuriidae by their lack of ophicephalous pedicellariae (despite presence of dactylous ones), and the presence of prominent membranous gaps along horizontal sutures in interambulacral zones of both oral and aboral surfaces. Taxonomy The World Echinoidea Database recognises these species:Kroh, A. (2015), Araeosoma' Mortensen, 1903. In: Kroh, A. & Mooi, R. (2015) World Echinoidea Database (World Register of Marine Species). * '' Araeosoma alternatum'' Mortensen, 1934 * '' Araeosoma anatirostrum'' Anderson, 2013 * '' Araeosoma bakeri'' Anderson, 2013 * '' Araeosoma belli'' Mortensen, 1903 * '' Araeosoma bidentatum'' Anderson, 2013 * '' Araeosoma brunnichi'' Ravn, 1928 † * '' Araeosoma coriaceum'' (Agassiz, 1879) * '' Araeosoma eurypatum'' Agassiz& Clark, 1909 * '' Araeosoma fenestratum'' (Thomson, 1872) * '' Ar ... [...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] |
Araeosoma Thetidis
''Araeosoma thetidis'' is a species of sea urchin of the family Echinothuriidae. This species can be found in deep sea off Australia and New Zealand. ''A. thetidis'' was first scientifically described in 1909 by Hubert Lyman Clark.Kroh, A. (2010). ''Araeosoma thetidis'' (Hubert Lyman Clark, 1909). 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 thetidis Animals described in 1909 {{echinoidea-stub ... [...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] |
Asthenosoma
Asthenosoma is a genus of sea urchins in the family Echinothuriidae. Their spines are covered with harmful venom capsules. Taxonomy The World Echinoidea Database recognises the following species: * '' Asthenosoma dilatatum'' Mortensen, 1934 * '' Asthenosoma ijimai'' Yoshiwara, 1897 * '' Asthenosoma intermedium'' H.L. Clark, 1938 * '' Asthenosoma marisrubri'' Weinberg & de Ridder, 1998 – "Red sea fire urchin" * '' Asthenosoma periculosum'' Endean, 1964 * '' Asthenosoma striatissimum'' Ravn, 1928 † * ''Asthenosoma varium'' Grube, 1868 – "fire sea urchin". "†" means an extinct taxon. Image:Pygmy Cuttlefish on Fire Seaurchin.jpg, ''Asthenosoma varium ''Asthenosoma varium'' is a sea urchin (an echinoderm, a member of the phylum that also includes star fish). Growing up to in diameter, it lives on sand and rubble sea bottoms in the Indo-Pacific, from the Red Sea to Australia and Southern Japan ...'' Image:Toxic Leather Sea Urchin - Asthenosoma marisrubri.jpg, '' Asthenos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calveriosoma
''Calveriosoma'' is a genus of echinoderms belonging to the family Echinothuriidae. The genus has almost cosmopolitan distribution In biogeography, cosmopolitan distribution is the term for the range of a taxon that extends across all or most of the world in appropriate habitats. Such a taxon, usually a species, is said to exhibit cosmopolitanism or cosmopolitism. The ext .... Species: *'' Calveriosoma gracile'' *'' Calveriosoma hystrix'' References Echinothuriidae Echinoidea genera {{echinoidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asthenosoma Marisrubri
''Asthenosoma marisrubri'' ('flexible body of the Red Sea') (Weinberg & De Ridder, 1998) aka Red Sea fire urchin and toxic leather sea urchin , is a relatively common sea urchin with a widespread distribution in the Indo-Pacific, and was till 1998 considered a color variant of ''Asthenosoma varium''. Sea urchins are close relatives of starfish, crinoids, brittle stars and sea cucumbers, all being echinoderms ('spiny skins'). This species grows to 25 cm in diameter, with articulated plates making the test quite flexible and accounting for its binomen. It prefers water temperatures in the range 24 °C – 27 °C and depths down to 90m. It subsists on a great variety of food including algae, coral polyps and bottom detritus. It is most active at night and is named for the extreme pain inflicted by its spines and its occurrence in the Red Sea. It often affords shelter to the commensal shrimps ''Allopontonia iaini'', ''Periclimenes colemani'', and the parasitic gastr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asthenosoma Varium
''Asthenosoma varium'' is a sea urchin (an echinoderm, a member of the phylum that also includes star fish). Growing up to in diameter, it lives on sand and rubble sea bottoms in the Indo-Pacific, from the Red Sea to Australia and Southern Japan. Its venom tipped spines, with distinctive globular swellings below the tip, can inflict a painful sting if handled; the pain lasts as long as several hours. This capacity, perhaps coupled with its reddish-brown colour, has given it the common name fire urchin; other commonly used names are Pacific fire urchin, elusive sea urchin, variable fire urchin, and electric sea urchin. It plays host to the commensal shrimps '' Periclimenes colemani'' and ''Allopontonia brockii'', and the zebra crab, ''Zebrida adamsii''. Description ''Asthenosoma varium'' is a large sea urchin, hemispherical in shape, and growing to a diameter of . The plates from which the test is formed are not joined rigidly together, as is the case in most sea urchins. Instea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Echinothurioida
The Echinothurioida are an order of sea urchins in the class Echinoidea. Echinothurioids are distinguished from other sea urchins by the combination of a flexible test and hollow spines. The membrane around the mouth contains only simple plates, in contrast to the more complex mouth parts of their close relatives, the Diadematoida. They are nearly all deepsea dwellers. Characteristics Echinothurioids have regular tests (shells) with 10 columns of plates. These plates are fused in groups of three with a central primary plate and a half plate on either side. The edge of each group of plates overlaps the next one in the manner of tiles on a roof and this means the test is flexible. These animals usually collapse to a disc shape when brought to the surface. The primary tubercles which articulate with the spines are each perforated by a hole and the spines are hollow. The primary spines are usually long and are used to support the test and in locomotion. In many species, the seconda ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
World Echinoidea Database
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 o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.jpg "Click for more on -> Sea Urchin")
