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Sclerodactylidae
Sclerodactylidae is a family of sea cucumbers Sea cucumbers are echinoderms from the class Holothuroidea (). They are marine animals with a leathery skin and an elongated body containing a single, branched gonad. Sea cucumbers are found on the sea floor worldwide. The number of holothurian ..., marine invertebrates with elongated bodies, leathery skins and tentacles. Members of the family are characterised by the complex ring of ossicles they have near the anterior end. These may or may not take the form of a short tube but are quite unlike the long tubes found in the phyllophorids. The tentacles number ten to twenty. Digital Nature Archive. Retrieved 2012-02-12. Genera The World Register of Marine Species recognizes the following genera: * genus ''[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sclerodactylidae
Sclerodactylidae is a family of sea cucumbers Sea cucumbers are echinoderms from the class Holothuroidea (). They are marine animals with a leathery skin and an elongated body containing a single, branched gonad. Sea cucumbers are found on the sea floor worldwide. The number of holothurian ..., marine invertebrates with elongated bodies, leathery skins and tentacles. Members of the family are characterised by the complex ring of ossicles they have near the anterior end. These may or may not take the form of a short tube but are quite unlike the long tubes found in the phyllophorids. The tentacles number ten to twenty. Digital Nature Archive. Retrieved 2012-02-12. Genera The World Register of Marine Species recognizes the following genera: * genus ''[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Afrocucumis
''Afrocucumis'' is a genus of sea cucumbers found in coastal waters in tropical and temperate regions. Characteristics Like other members of the family Sclerodactylidae, members of the genus ''Afrocucumis'' are characterised by the complex ring of ossicles The ossicles (also called auditory ossicles) are three bones in either middle ear that are among the smallest bones in the human body. They serve to transmit sounds from the air to the fluid-filled labyrinth (cochlea). The absence of the auditory ... they have near the anterior end. These may or may not take the form of a short tube, but are quite unlike the long tubes found in the phyllophorids. The tentacles number ten to twenty. Digital Nature Archive. Retrieved 2012-02-12. Species *''[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Afrocucumis Africana
''Afrocucumis'' is a genus of sea cucumbers found in coastal waters in tropical and temperate regions. Characteristics Like other members of the family Sclerodactylidae, members of the genus ''Afrocucumis'' are characterised by the complex ring of ossicles The ossicles (also called auditory ossicles) are three bones in either middle ear that are among the smallest bones in the human body. They serve to transmit sounds from the air to the fluid-filled labyrinth (cochlea). The absence of the auditory ... they have near the anterior end. These may or may not take the form of a short tube, but are quite unlike the long tubes found in the phyllophorids. The tentacles number ten to twenty. Digital Nature Archive. Retrieved 2012-02-12. Species *''[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eupentacta
''Eupentacta'' is a genus of sea cucumbers found in coastal waters in tropical and temperate regions. Characteristics Like other members of the family Sclerodactylidae, members of ''Eupentacta'' are characterised by the complex ring of ossicles The ossicles (also called auditory ossicles) are three bones in either middle ear that are among the smallest bones in the human body. They serve to transmit sounds from the air to the fluid-filled labyrinth (cochlea). The absence of the auditory ... they have near the anterior end. These may or may not take the form of a short tube, but are quite unlike the long tubes found in the phyllophorids. The tentacles number ten to twenty. Digital Nature Archive. Retrieved 2012-02-12. Species *''[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sclerodactyla Briareus
''Sclerodactyla briareus'', commonly known as the hairy sea cucumber, is a species of marine invertebrate in the family Sclerodactylidae. It is found in shallow waters in the western Atlantic Ocean. Description ''Sclerodactyla briareus'' is an elongated oval or cigar-shaped sea cucumber and grows to about . It often adopts a characteristic pose with both ends raised above the substrate. At the anterior end there is a mouth surrounded by a ring of ten, short, branched feeding tentacles. These are modified tube feet that can be retracted back into the mouth when the animal is not feeding. The surface of the body is divided into five ambulacral areas with five shallow interambulacral grooves in between. Internally there are five bands of muscle running along the ambulacrae and there are also transverse bands of muscles. Just behind the tentacles is a group of small ossicles, calcareous stiffening plates, forming a short tube surrounding the pharynx. These provide a skeletal support ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eupentacta Quinquesemita
''Eupentacta quinquesemita'' is a species of sea cucumber, a marine invertebrate with an elongated body, a leathery skin and tentacles surrounding the mouth. It is commonly known as the stiff-footed sea cucumber or white sea cucumber, and occurs on rocky coasts in the northeastern Pacific Ocean. Description ''Eupentacta quinquesemita'' can grow to a length of up to . The tube feet are arranged in four longitudinal rows; they are non-retractable and give the animal a spiny appearance. The skin between the tube feet is smooth, but both body wall and tube feet contain calcareous ossicles that make them stiff. The mouth is surrounded by ten branched feeding tentacles, the two lowest ones being smaller than the rest. The general body colour is white, the tentacles (often the only parts of the animal that are visible) being creamy-white, often with yellowish or pinkish bases. Bits of shell or other fragments often adhere to the tube feet. Distribution and habitat ''E. quinquesemita'' i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Holothuroidea
Sea cucumbers are echinoderms from the class Holothuroidea (). They are marine animals with a leathery skin and an elongated body containing a single, branched gonad. Sea cucumbers are found on the sea floor worldwide. The number of holothurian () species worldwide is about 1,717, with the greatest number being in the Asia-Pacific region. Many of these are gathered for human consumption and some species are cultivated in aquaculture systems. The harvested product is variously referred to as '' trepang'', ''namako'', ''bêche-de-mer'', or ''balate''. Sea cucumbers serve a useful role in the marine ecosystem as they help recycle nutrients, breaking down detritus and other organic matter, after which bacteria can continue the decomposition process. Like all echinoderms, sea cucumbers have an endoskeleton just below the skin, calcified structures that are usually reduced to isolated microscopic ossicles (or sclerietes) joined by connective tissue. In some species these can sometim ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ossicle (echinoderm)
Ossicles are small calcareous elements embedded in the dermis of the body wall of echinoderms. They form part of the endoskeleton and provide rigidity and protection. They are found in different forms and arrangements in sea urchins, starfish, brittle stars, sea cucumbers, and crinoids. The ossicles and spines (which are specialised sharp ossicles) are the only parts of the animal likely to be fossilized after an echinoderm dies. Formation Ossicles are created intracellularly by specialised secretory cells known as sclerocytes in the dermis of the body wall of echinoderms. Each ossicle is composed of microcrystals of calcite arranged in a three-dimensional lattice known as a stereom. Under polarized light the ossicle behaves as if it were a single crystal because the axes of all the crystals are parallel. The space between the crystals is known as the stroma and allows entry to sclerocytes for enlargement and repair. The honeycomb structure is light but tough and collage ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
