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Molpadida Incertae Sedis
Molpadida is an order (biology), order of Holothuroidea, sea cucumbers. The body shape is wikt:fusiform, fusiform and unlike other sea cucumbers, their hind body is narrowed to form a distinct tail. Although they possess tentacles around the mouth derived from the water vascular system, they have no true tube feet, and are therefore believed to be related to the Apodida. They have fifteen much branched tentacles and a stout body. They have tentacle ampullae and respiratory trees present, a kind of water lung attached to the cloaca. The Ossicle (echinoderm), ossicles, minute calcareous plates embedded in the skin and characteristic of each species, take the form of tables, anchors, fusiform rods and perforated plates but never wheels. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Molpadia (echinoderm)
In Greek mythology, Molpadia (Ancient Greek: Μολπαδία means 'divine song') may refer to the two different women: * Molpadia, an Amazon who was said to have fought for both Antiope and Orithyia. She was a participant in the Attic War, where she witnessed her queen Antiope sustain heavy injuries. Antiope was hurt so seriously that she could not defend herself from Theseus and his retainers. Knowing this, Molpadia killed the queen with an arrow (some say spear), saving her from violation by the Athenian king. Other sources, however, state that she killed Antiope by accident. She was afterwards killed by Theseus, and her tomb was shown at Athens. Like many other Amazons, she may have been named for a goddess, in this case a psychopomp deity. Her name means "Death Song". * Molpadia, daughter of Staphylus and Chrysothemis, sister of Parthenos and Rhoeo, alternatively called Hemithea. Cultural depictions Molpadia is a supporting character in Evangeline Walton's 1983 historical ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ernst Haeckel
Ernst Heinrich Philipp August Haeckel (; 16 February 1834 – 9 August 1919) was a German zoologist, naturalist, eugenicist, philosopher, physician, professor, marine biologist and artist. He discovered, described and named thousands of new species, mapped a genealogical tree relating all life forms and coined many terms in biology, including ''ecology'', ''phylum'', ''phylogeny'', and '' Protista.'' Haeckel promoted and popularised Charles Darwin's work in Germany and developed the influential but no longer widely held recapitulation theory ("ontogeny recapitulates phylogeny") claiming that an individual organism's biological development, or ontogeny, parallels and summarises its species' evolutionary development, or phylogeny. The published artwork of Haeckel includes over 100 detailed, multi-colour illustrations of animals and sea creatures, collected in his '' Kunstformen der Natur'' ("Art Forms of Nature"), a book which would go on to influence the Art Nouveau artistic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caudinidae
Caudinidae is a family of sea cucumbers, marine animals with elongated bodies, leathery skins and tentacles that are found on the sea floor. Description Members of the family Caudinidae are fairly small, plump sea cucumbers with a thin body wall and no tube feet. They are relatively inactive and live in a "U"-shaped burrow in sand or mud at the bottom of the sea. Their tentacles spread out above the sediment to catch food particles and their caudal region may be elongated and also extend to the surface. This may help with gas exchange as they have respiratory trees, a type of water lung, attached to the cloaca. Genera The following genera Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial ... are accepted in the family Caudinidae: *'' Acaudina'' Clark, 1907 *'' Caudina'' Stimpson, 185 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eupyrgidae
''Eupyrgus'' is a genus of sea cucumbers. It is the only genus in the monotypic family Eupyrgidae. Species There are two species recognised in the genus ''Eupyrgus'': * ''Eupyrgus pacificus'' Östergren, 1905 * ''Eupyrgus scaber ''Eupyrgus'' is a genus of sea cucumbers. It is the only genus in the monotypic family Eupyrgidae. Species There are two species recognised in the genus ''Eupyrgus'': * ''Eupyrgus pacificus ''Eupyrgus'' is a genus of sea cucumbers. It is the ...'' Lütken, 1857 References Molpadiida Holothuroidea genera {{Holothuroidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Molpadiidae
Molpadiidae is a family of sea cucumbers, marine invertebrates with elongated bodies, leathery skins and tentacles that are found on or burrowing in the sea floor. Description Members of Molpadiidae are fairly small, plump sea cucumbers with a smooth or slimy skin and no tube feet. They are relatively inactive and live in a "U"-shaped burrow in sand or mud at the bottom of the sea, often at considerable depths. Their tentacles spread out above the sediment to catch food particles. Genera The following genera are accepted as being in the family Molpadiidae: *'' Cherbonniera'' Sibuet, 1974 *'' Heteromolpadia'' Pawson, 1963 *''Molpadia In Greek mythology, Molpadia (Ancient Greek: Μολπαδία means 'divine song') may refer to the two different women: * Molpadia, an Amazon who was said to have fought for both Antiope and Orithyia. She was a participant in the Attic War, w ...'' Cuvier, 1817 References Molpadiida {{Holothuroidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Molpadida Incertae Sedis
Molpadida is an order (biology), order of Holothuroidea, sea cucumbers. The body shape is wikt:fusiform, fusiform and unlike other sea cucumbers, their hind body is narrowed to form a distinct tail. Although they possess tentacles around the mouth derived from the water vascular system, they have no true tube feet, and are therefore believed to be related to the Apodida. They have fifteen much branched tentacles and a stout body. They have tentacle ampullae and respiratory trees present, a kind of water lung attached to the cloaca. The Ossicle (echinoderm), ossicles, minute calcareous plates embedded in the skin and characteristic of each species, take the form of tables, anchors, fusiform rods and perforated plates but never wheels. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Order (biology)
Order ( la, ordo) 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 follo ... [...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 sometimes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fusiform
Fusiform means having a spindle-like shape that is wide in the middle and tapers at both ends. It is similar to the lemon-shape, but often implies a focal broadening of a structure that continues from one or both ends, such as an aneurysm on a blood vessel. Examples * Fusiform, a body shape common to many aquatic animals, characterized by being tapered at both the head and the tail * Fusiform, a classification of aneurysm * Fusiform bacteria (spindled rods, that is, fusiform bacilli), such as the Fusobacteriota * Fusiform cell (biology) * Fusiform face area, a part of the human visual system which seems to specialize in facial recognition * Fusiform gyrus, part of the temporal lobe of the brain * Fusiform muscle, where the fibres run parallel along the length of the muscle * Fusiform neuron, a spindle-shaped neuron References {{Reflist Geometric shapes See also * Streamliner A streamliner is a vehicle incorporating streamlining in a shape providing reduced a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Water Vascular System
The water vascular system is a hydraulic system used by echinoderms, such as sea stars and sea urchins, for locomotion, food and waste transportation, and respiration. The system is composed of canals connecting numerous tube feet. Echinoderms move by alternately contracting muscles that force water into the tube feet, causing them to extend and push against the ground, then relaxing to allow the feet to retract. The exact structure of the system varies somewhat between the five classes of echinoderm. The system is part of the coelomic cavities of echinoderms, together with the haemal coelom (or haemal system), perivisceral coelom, gonadal coelom and perihaemal coelom. Other terms sometimes used to refer to the water vascular system are "ambulacral system" and "aquiferous system". In the past, "aquiferous system" was also used to refer to many unrelated invertebrate structures, but today, it is restricted to water channels in sponges and the hydrostatic skeleton of some mollu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tube Feet
Tube feet (technically podia) are small active tubular projections on the oral face of an echinoderm, whether the arms of a starfish, or the undersides of sea urchins, sand dollars and sea cucumbers; they are more discreet though present on brittle stars, and have only a feeding function in feather stars. They are part of the water vascular system. Structure and function Tube feet function in locomotion, feeding, and respiration. The tube feet in a starfish are arranged in grooves along the arms. They operate through hydraulic pressure. They are used to pass food to the oral mouth at the center, and can attach to surfaces. A starfish that is inverted turns one arm over and attaches it to a solid surface, and levers itself the right way up. Tube feet allow these different types of animals to stick to the ocean floor and move slowly. Each tube foot consists of two parts: the ampulla and the podium. The ampulla is a water-filled sac contained in the body of the animal that co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apodida
Apodida is an order of littoral to deep-sea, largely infaunal holothurians, sea cucumbers. This order comprises three families, 32 genera and about 270 known species, called apodids, "without feet". Characteristics These sea cucumbers are vagile holothurians with an elongated shape (up to 3 meters for '' Synapta maculata''), worm or snake-like. Their shape is adapted for burrowing through the sediment, sometimes in a fashion similar to earthworms. Their mouth is surrounded with 10-25 pinnate or peltate tentacles. The absence of tube feet gives the order its name, ''Apodida'' meaning ''without feet'' : they move by crawling on the sediment, hence they need flat bottoms with few current. Members of this order have a circum-oral ring and tentacles, but do not have tube feet or radial canals. They also lack the complex respiratory trees found in other sea cucumbers, and respire and excrete nitrogenous waste through their skin. The ossicles, minute calcareous plates embedded in t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
