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Lucernaria Janetae
''Lucernaria janetae '' is an exceptionally large stalked jellyfish discovered on deep-sea hydrothermal vents on the East Pacific Rise in 2003 and described in 2005. Name This species was named after Dr Janet Voight of the Field Museum of Natural History in Chicago "in recognition of her commitment to discovering and describing deep-sea invertebrates". Description ''L. janetae'' is an exceptionally large stalked jellyfish. It has eight distinct arms which are tipped with clusters of about 100 secondary tentacles. Small juvenile forms of this species sometimes have small, ovate primary tentacles but these are always absent in the adult organism. This species does not have anchor tentacles. The 'umbrella' (calyx) of this organism is goblet-shaped and creamy white with a hint of green or orange. It is up to 100mm wide and 50mm deep, a significantly larger calyx size than those of other members of this genus. The 'stalk' (peduncle) is the same colour as the calyx. Unlike the p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stauromedusae
Stauromedusae are the stalked jellyfishes. They are the sole living members of the class Staurozoa and belong to the medusozoa subphylum of Cnidaria. They are unique among medusa jellyfish in that they do not have an alternation of polyp and medusa life cycle phases, but are instead interpreted as an attached medusa stage. With a lifestyle more resembling that of polypoid forms. They have a generally trumpet-shaped body, oriented upside-down in comparison with other jellyfish, with the tentacles projecting upwards, and the stalk located in the centre of the umbrella. Members of this class are commonly found in relatively cold waters, close to the shoreline. Sexually mature stauromedusae free-spawn eggs or sperm, which fertilize in the sea and form a creeping, unciliated planula larva. The larvae crawl across the sea floor and find a suitable place, attaching themselves typically to rock or algae, where they eventually develop into a new, attached stauromedusa. Unlike most scyphoz ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydrothermal Vents
A hydrothermal vent is a fissure on the seabed from which geothermally heated water discharges. They are commonly found near volcanically active places, areas where tectonic plates are moving apart at mid-ocean ridges, ocean basins, and hotspots. Hydrothermal deposits are rocks and mineral ore deposits formed by the action of hydrothermal vents. Hydrothermal vents exist because the earth is both geologically active and has large amounts of water on its surface and within its crust. Under the sea, they may form features called black smokers or white smokers. Relative to the majority of the deep sea, the areas around hydrothermal vents are biologically more productive, often hosting complex communities fueled by the chemicals dissolved in the vent fluids. Chemosynthetic bacteria and Archaea form the base of the food chain, supporting diverse organisms, including giant tube worms, clams, limpets and shrimp. Active hydrothermal vents are thought to exist on Jupiter's moon Europa an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
East Pacific Rise
The East Pacific Rise is a mid-ocean rise (termed an oceanic rise and not a mid-ocean ridge due to its higher rate of spreading that results in less elevation increase and more regular terrain), a divergent tectonic plate boundary located along the floor of the Pacific Ocean. It separates the Pacific Plate to the west from (north to south) the North American Plate, the Rivera Plate, the Cocos Plate, the Nazca Plate, and the Antarctic Plate. It runs south from the Gulf of California in the Salton Sea basin in Southern California to a point near 55° S, 130° W, where it joins the Pacific-Antarctic Ridge trending west-southwest towards Antarctica, near New Zealand (though in some uses the PAR is regarded as the southern section of the EPR). Much of the rise lies about 3200 km (2000 mi) off the South American coast and rises about 1,800–2,700 m (6,000–9,000 ft) above the surrounding seafloor. Overview The oceanic crust is moving away from the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Field Museum Of Natural History
The Field Museum of Natural History (FMNH), also known as The Field Museum, is a natural history museum in Chicago, Illinois, and is one of the largest such museums in the world. The museum is popular for the size and quality of its educational and scientific programs, and its extensive scientific-specimen and artifact collections. The permanent exhibitions, which attract up to two million visitors annually, include fossils, current cultures from around the world, and interactive programming demonstrating today's urgent conservation needs. The museum is named in honor of its first major benefactor, Marshall Field, the department-store magnate. The museum and its collections originated from the 1893 World's Columbian Exposition and the artifacts displayed at the fair. The museum maintains a temporary exhibition program of traveling shows as well as in-house produced topical exhibitions. The professional staff maintains collections of over 24 million specimens and objects tha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lucernaria
''Lucernaria'' is a genus of cnidarians belonging to the family Lucernariidae. The species of this genus are found in Europe and America. Species: *''Lucernaria australis'' *''Lucernaria bathyphila'' *''Lucernaria haeckeli'' *''Lucernaria infundibulum'' *''Lucernaria janetae'' *''Lucernaria quadricornis'' *''Lucernaria sainthilairei'' *''Lucernaria sainthilarei'' *''Lucernaria walteri ''Lucernaria'' is a genus of cnidarians belonging to the family Lucernariidae. The species of this genus are found in Europe and America. Species: *''Lucernaria australis'' *''Lucernaria bathyphila'' *''Lucernaria haeckeli'' *''Lucernaria i ...'' References Lucernariidae Medusozoa genera {{medusozoa-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lucernaria Bathyphila
''Lucernaria'' is a genus of cnidarians belonging to the family Lucernariidae. The species of this genus are found in Europe and America. Species: *'' Lucernaria australis'' *'' Lucernaria bathyphila'' *''Lucernaria haeckeli ''Lucernaria'' is a genus of cnidarians belonging to the family Lucernariidae. The species of this genus are found in Europe and America. Species: *''Lucernaria australis'' *''Lucernaria bathyphila'' *''Lucernaria haeckeli'' *''Lucernaria i ...'' *'' Lucernaria infundibulum'' *'' Lucernaria janetae'' *'' Lucernaria quadricornis'' *'' Lucernaria sainthilairei'' *'' Lucernaria sainthilarei'' *'' Lucernaria walteri'' References Lucernariidae Medusozoa genera {{medusozoa-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pelagic Zone
The pelagic zone consists of the water column of the open ocean, and can be further divided into regions by depth (as illustrated on the right). The word ''pelagic'' is derived . The pelagic zone can be thought of as an imaginary cylinder or water column between the surface of the sea and the bottom. Conditions in the water column change with depth: pressure increases; temperature and light decrease; salinity, oxygen, micronutrients (such as iron, magnesium and calcium) all change. Marine life is affected by bathymetry (underwater topography) such as the seafloor, shoreline, or a submarine seamount, as well as by proximity to the boundary between the ocean and the atmosphere at the ocean surface, which brings light for photosynthesis, predation from above, and wind stirring up waves and setting currents in motion. The pelagic zone refers to the open, free waters away from the shore, where marine life can swim freely in any direction unhindered by topographical constraints. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amphipoda
Amphipoda is an order of malacostracan crustaceans with no carapace and generally with laterally compressed bodies. Amphipods range in size from and are mostly detritivores or scavengers. There are more than 9,900 amphipod species so far described. They are mostly marine animals, but are found in almost all aquatic environments. Some 1,900 species live in fresh water, and the order also includes the terrestrial sandhoppers such as ''Talitrus saltator''. Etymology and names The name ''Amphipoda'' comes, via New Latin ', from the Greek roots 'on both/all sides' and 'foot'. This contrasts with the related Isopoda, which have a single kind of thoracic leg. Particularly among anglers, amphipods are known as ''freshwater shrimp'', ''scuds'', or ''sideswimmers''. Description Anatomy The body of an amphipod is divided into 13 segments, which can be grouped into a head, a thorax and an abdomen. The head is fused to the thorax, and bears two pairs of antennae and one pair of s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Halice Hesmonectes
{{dab, geo ...
Halice may refer to: * Halych, a historic city in Ukraine * Halice (Argolis), a town of ancient Argolis, Greece * ''Halice'' (genus), a genus of prehistoric mollusc Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is esti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Haliclystus Antarcticus
''Haliclystus'' is a genus of stalked jellyfish Stauromedusae are the stalked jellyfishes. They are the sole living members of the class Staurozoa and belong to the medusozoa subphylum of Cnidaria. They are unique among medusa jellyfish in that they do not have an alternation of polyp and med ... that contains 11 species and one nomen nudum ('' Haliclystus sanjuanensis''). It is the largest genus in the order Stauromedusae. Members of this genus are found in the Pacific, Atlantic, Indian, Arctic, and Southern oceans. Two members of this genus, '' Haliclystus kerguelensis'' and '' Haliclystus antarcticus'', are found in the Southern hemisphere only. The remaining 9 members are found in the Northern hemisphere only.http://www.mapress.com/zootaxa/2010/f/zt02518p059.pdf Species in this genus have four longitudinal planes of symmetry. They have eight arms which are tipped with clusters of secondary tentacles. The number of these secondary tentacles is reported to vary acros ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lucernariidae
Lucernariidae is a family of stalked jellyfish Stauromedusae are the stalked jellyfishes. They are the sole living members of the class Staurozoa and belong to the medusozoa subphylum of Cnidaria. They are unique among medusa jellyfish in that they do not have an alternation of polyp and med ... containing two genera. Species *Genus Lucernaria O. F. Müller, 1776 ** Lucernaria australis Vanhöffen, 1908 ** Lucernaria bathyphila Haeckel, 1880 ** Lucernaria haeckeli (Antipa, 1892) ** Lucernaria infundibulum Haeckel, 1880 ** Lucernaria janetae Collins & Daly, 2005 ** Lucernaria quadricornis O. F. Müller, 1776 ** Lucernaria sainthilairei (Redikorzev, 1925) ** Lucernaria walteri (Antipa, 1892) *Genus Stylocoronella Salvini-Plawen, 1966 ** Stylocoronella riedli Salvini-Plawen, 1966 ** Stylocoronella variabilis Salvini-Plawen, 1987 References External links Lucernariidae on World Register of Marine Species Myostaurida Cnidarian families {{staurozoa-st ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Animals Described In 2005
Animals are multicellular, eukaryotic organisms in the biological kingdom Animalia. With few exceptions, animals consume organic material, breathe oxygen, are able to move, can reproduce sexually, and go through an ontogenetic stage in which their body consists of a hollow sphere of cells, the blastula, during embryonic development. Over 1.5 million living animal species have been described—of which around 1 million are insects—but it has been estimated there are over 7 million animal species in total. Animals range in length from to . They have complex interactions with each other and their environments, forming intricate food webs. The scientific study of animals is known as zoology. Most living animal species are in Bilateria, a clade whose members have a bilaterally symmetric body plan. The Bilateria include the protostomes, containing animals such as nematodes, arthropods, flatworms, annelids and molluscs, and the deuterostomes, containing the echinoderms and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
