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Discomedusae
Discomedusae is a subclass of jellyfish in the class Scyphozoa. It is the sister taxon of Coronamedusae. Discomedusae contains about 155 named species and there are likely to be many more as yet undescribed. Jellyfish in this subclass are much more likely to have swarming events or form blooms than those in Coronamedusae. Discomedusae consists of two orders, Rhizostomae and Semaeostomeae. Rhizostomae Members of the order Rhizostomae are collectively known as "root-mouth jellies" and are very diverse. They do not have tentacles or other structures at the edge of the bell, instead they have eight oral arms which fuse together to form the manubrium, a central organ with the mouth at its tip, resembling an elephant's trunk. Some have numerous manubrial outgrowths, well-armed with cnidocytes and mucus-secreting cells; others have the central manubrial mouth closed, instead making use of secondary mouths at the side of the manubrium. These adaptations give the jellyfish a large surfac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Discomedusae
Discomedusae is a subclass of jellyfish in the class Scyphozoa. It is the sister taxon of Coronamedusae. Discomedusae contains about 155 named species and there are likely to be many more as yet undescribed. Jellyfish in this subclass are much more likely to have swarming events or form blooms than those in Coronamedusae. Discomedusae consists of two orders, Rhizostomae and Semaeostomeae. Rhizostomae Members of the order Rhizostomae are collectively known as "root-mouth jellies" and are very diverse. They do not have tentacles or other structures at the edge of the bell, instead they have eight oral arms which fuse together to form the manubrium, a central organ with the mouth at its tip, resembling an elephant's trunk. Some have numerous manubrial outgrowths, well-armed with cnidocytes and mucus-secreting cells; others have the central manubrial mouth closed, instead making use of secondary mouths at the side of the manubrium. These adaptations give the jellyfish a large surfac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Semaeostomeae
Semaeostomeae (literally "flag mouths") is an order of large jellyfish characterized by four long, frilly oral arms flanking their quadrate mouths. The umbrella is domed with scalloped margins, and the gastrovascular system consists of four unbranched pouches radiating outwards from the central stomach; no ring canal is present. They usually possess eight tentacles; four are per-radical and four are inter-radical. Taxonomy The order consists of five families. * Family Cyaneidae * Family DrymonematidaeBayha, K. M., and M. N. Dawson (2010). ''New family of allomorphic jellyfishes, Drymonematidae (Scyphozoa, Discomedusae), emphasizes evolution in the functional morphology and trophic ecology of gelatinous zooplankton.'' The Biological Bulletin 219(3): 249–267 * Family Pelagiidae * Family Phacellophoridae * Family Ulmaridae Differentiation The three traditional families, Pelagiidae, Cyaneidae, and Ulmaridae, are distinguishable by these characteristics: * Gastrovascular cavity di ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scyphozoa
The Scyphozoa are an exclusively marine class of the phylum Cnidaria, referred to as the true jellyfish (or "true jellies"). The class name Scyphozoa comes from the Greek word ''skyphos'' (), denoting a kind of drinking cup and alluding to the cup shape of the organism. Scyphozoans have existed from the earliest Cambrian to the present. Biology Most species of Scyphozoa have two life-history phases, including the planktonic medusa or polyp form, which is most evident in the warm summer months, and an inconspicuous, but longer-lived, bottom-dwelling polyp, which seasonally gives rise to new medusae. Most of the large, often colorful, and conspicuous jellyfish found in coastal waters throughout the world are Scyphozoa. They typically range from in diameter, but the largest species, ''Cyanea capillata'' can reach across. Scyphomedusae are found throughout the world's oceans, from the surface to great depths; no Scyphozoa occur in freshwater (or on land). As medusae, they eat a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kunstformen Der Natur
(known in English as ''Art Forms in Nature'') is a book of lithographic and halftone prints by German biologist Ernst Haeckel. Publication Originally published in sets of ten between 1899 and 1904 and collectively in two volumes in 1904, it consists of 100 prints of various organisms, many of which were first described by Haeckel himself. Over the course of his career, over 1000 engravings were produced based on Haeckel's sketches and watercolors; many of the best of these were chosen for , translated from sketch to print by lithographer Adolf Giltsch. A second edition of , containing only 30 prints, was produced in 1914. Themes According to Haeckel scholar Olaf Breidbach, the work was "not just a book of illustrations but also the summation of his view of the world." The over-riding themes of the plates are symmetry and level ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jellyfish
Jellyfish and sea jellies are the informal common names given to the medusa-phase of certain gelatinous members of the subphylum Medusozoa, a major part of the phylum Cnidaria. Jellyfish are mainly free-swimming marine animals with umbrella-shaped bells and trailing tentacles, although a few are anchored to the seabed by stalks rather than being mobile. The bell can pulsate to provide propulsion for highly efficient animal locomotion, locomotion. The tentacles are armed with Cnidocyte, stinging cells and may be used to capture prey and defend against predators. Jellyfish have a complex Biological life cycle, life cycle; the medusa is normally the sexual phase, which produces planula larvae that disperse widely and enter a sedentary polyp (zoology), polyp phase before reaching sexual maturity. Jellyfish are found all over the world, from surface waters to the deep sea. Scyphozoans (the "true jellyfish") are exclusively marine habitats, marine, but some hydrozoans with a simila ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coronamedusae
Coronamedusae is a subclass of jellyfish in the class Scyphozoa. It is the sister taxon of Discomedusae and contains about 50 named species, all included in the order Coronatae. Jellyfish in this subclass are either small medusae living in shallow marine environments, or large medusae living in the deep sea. The mouthparts of the members of this subclass are characterised by simple lips on a short manubrium as well as by robust marginal tentacles that arc away from the mouth. It is likely that these marginal tentacles are used to capture plankton, including crustaceans and small fish in the larger species. Coronatae Coronatae is the only order in this subclass, with around thirty-five species having been described, most of them deepwater jellyfish. The thimble jellyfish (''Linuche unguiculata'') is a tiny species, and one of the few from shallow tropical seas; It is a zooxanthellate species. Coronatids have a characteristic constriction, the coronal groove, part way down the bel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhizostomae
Rhizostomae or Rhizostomeae is an order of jellyfish. Species of this order have neither tentacles nor other structures at the bell's edges. Instead, they have eight highly branched oral arms, along which there are suctorial minimouth orifices. (This is in contrast to other scyphozoans, which have four of these arms.) These oral arms become fused as they approach the central part of the jellyfish. The mouth of the animal is also subdivided into minute pores that are linked to coelenteron. Edible jellyfish Jellyfish species fished on a commercial basis for human consumption (both as a delicacy and for use in traditional medicine) are all from this orderLópez-Martínez; and Álvarez-Tello (2013). ''The jellyfish fishery in Mexico.'' Agricultural Sciences 4(6A): 57-61. and include members of the families Catostylidae, Lobonematidae, Rhizostomatidae and Stomolophidae.Miura; Miura; and Park (2006). ''Collagen as the Major Edible Component of Jellyfish (Stomolophus nomural).'' Jou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Drymonematidae
''Drymonema'' is a genus of true jellyfish, placed in its own family, the Drymonematidae. There are three species: ''Drymonema dalmatinum'', ''Drymonema gorgo'', and ''Drymonema larsoni'', which are found in the Gulf of Mexico, Atlantic Ocean and Mediterranean Sea. Classification ''Drymonema'' was described as a distinct family based on DNA evidence and morphological analysis, in 2011. The first species described, ''D. larsoni'', was named after the scientist Ronald G. Larson who pioneered work on the species in the 1980s. The new family Drymonematidae was the first new addition of true jellyfish (scyphozoans) described since 1921. Species *''Drymonema dalmatinum'' Haeckel, 1880 *''Drymonema gorgo'' F. Müller, 1883 *''Drymonema larsoni'' Bayha & Dawson, 2010 ''Drymonema larsoni'' "Pink Meanie" ''Drymonema larsoni'' is a species that forms large, dangerous blooms in the northern area of the Gulf of Mexico. ''Drymonema larsoni'' get their name "pink meanie" from their preda ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cyaneidae
The Cyaneidae are a family of true jellyfish. About 20 species are in this family, including the well-known lion's-mane jellyfish. Species The following species are recognized within the family Cyaneidae. Formerly, this family also included the genus '' Drymonema''. The Cyaneidae species do not possess any internal organs, ganglia, or any other nerve cells. They do, however, possess gap junctions between neurons which allow for complex reactive behavior and swimming actions. * Genus '' Cyanea'' Péron & Lesueur, 1810 **''Cyanea annaskala'' von Lendenfeld, 1884 **'' Cyanea buitendijki'' Stiasny, 1919 **''Cyanea capillata'' (Linnaeus, 1758) **'' Cyanea citrae'' (Kishinouye, 1910) **''Cyanea ferruginea'' Eschscholtz, 1929 **''Cyanea lamarckii'' Péron & Lesueur, 1809 **''Cyanea nozakii'' Kishinouye, 1891 **''Cyanea postelsi'' Brandt, 1838 **''Cyanea purpurea'' Kishinouye, 1910 **''Cyanea rosea Cyanea may refer to: * ''Cyanea'' (jellyfish), a genus of jellyfish in the family Cy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ulmaridae
The Ulmaridae are a family of jellyfish. Genera Formerly, the genus '' Phacellophora'' was also included in this family, but is now placed in the family Phacellophoridae.Straehler-Pohl, I., C. L. Widmer, and A. C. Morandini (2011). ''Characterizations of juvenile stages of some semaeostome Scyphozoa (Cnidaria), with recognition of a new family (Phacellophoridae).'' Zootaxa 2741: 1-37 *''Aurelia'' (includes the moon jelly) *'' Aurosa'' *'' Deepstaria'' *'' Diplulmaris'' *'' Discomedusa'' *'' Floresca'' *'' Parumbrosa'' *'' Poralia'' *'' Stellamedusa'' *'' Sthenonia'' *'' Stygiomedusa (the giant phantom jelly)'' *''Tiburonia ''Tiburonia'' is a genus of jellyfish in the family Ulmaridae. It was reported in 2003, following the discovery of its only species yet identified, ''Tiburonia granrojo''. It was discovered by a crew from MBARI led by George Matsumoto. Pieces of ...'' *'' Ulmaris'' References Semaeostomeae Cnidarian families {{Scyphozoa-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phacellophoridae
''Phacellophora camtschatica'', commonly known as the fried egg jellyfish or egg-yolk jellyfish, is a very large jellyfish in the family Phacellophoridae. This species can be easily identified by the yellow coloration in the center of its body which closely resembles an egg yolk, hence how it got its common name. Some individuals can have a bell close to 60 cm (2 ft) in diameter, and most individuals have 16 clusters of up to a few dozen tentacles, each up to 6 m (20 ft) long. A smaller jellyfish, '' Cotylorhiza tuberculata'', typically found in warmer water, particularly in the Mediterranean Sea, is also popularly called a fried egg jellyfish. Also, ''P. camtschatica'' is sometimes confused with the Lion's mane jellyfish (''Cyanea capillata''). It feeds primarily by collecting medusae and plankton with its tentacles, and bringing them into its mouth for digestion. It is capable of only limited motion, and mostly drifts with the current, even when swimming. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pelagiidae
The Pelagiidae are a family of jellyfish. Members of the family ''Pelagiidae'' have no ring canal, and the marginal tentacles arise from umbrella margin. Genera There are four genera currently recognized: *Genus ''Chrysaora'' – (14 species) *Genus ''Mawia'' – ''Mawia benovici'' *Genus ''Pelagia'' – ''Pelagia noctiluca'' *Genus ''Sanderia ''Sanderia'' is a genus of jellyfish in the family Pelagiidae The Pelagiidae are a family of jellyfish. Members of the family ''Pelagiidae'' have no ring canal, and the marginal tentacles arise from umbrella margin. Genera There are four gener ...'' – (2 species) References Cnidarian families Semaeostomeae {{Scyphozoa-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
