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Gurgesiellidae
Pygmy skates are cartilaginous fish belonging to the family Gurgesiellidae in the superorder Batoidea of rays Ray may refer to: Fish * Ray (fish), any cartilaginous fish of the superorder Batoidea * Ray (fish fin anatomy), a bony or horny spine on a fin Science and mathematics * Ray (geometry), half of a line proceeding from an initial point * Ray (gra .... Nineteen species in three genera are known.Weigmann, S., Séret, B., Last, P.R. & McEachran, J.D. 2016. Pygmy Skates, Family Gurgesiellidae. Pp. 473–493 in Last, P.R., White, W.T., Carvalho, M.R., Séret, B., Stehmann, M. & Naylor, G.J.P. (eds.). Rays of the World. CSIRO Publishing: Melbourne. . Genera * '' Cruriraja'' * '' Fenestraja'' * '' Gurgesiella'' References Ray families Rajiformes {{Rajiformes-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fenestraja
''Fenestraja'' is a genus of eight species of Skate (fish), skate in the family Gurgesiellidae. They are found in deeper waters of the western Atlantic (including the Caribbean Sea, Caribbean and Gulf of Mexico) and the Indian Ocean (east to Bali).Weigmann, S., Séret, B., Last, P.R. & McEachran, J.D. 2016. Pygmy Skates, Family Gurgesiellidae. Pp. 473–493 in Last, P.R., White, W.T., Carvalho, M.R., Séret, B., Stehmann, M. & Naylor, G.J.P. (eds.). Rays of the World. CSIRO Publishing: Melbourne. . Reference page. Species * ''Fenestraja atripinna'' (Henry Bryant Bigelow, Bigelow & William Charles Schroeder, Schroeder, 1950) (Blackfin pygmy skate) * ''Fenestraja cubensis'' (Henry Bryant Bigelow, Bigelow & William Charles Schroeder, Schroeder, 1950) (Cuban pygmy skate) * ''Fenestraja ishiyamai'' (Henry Bryant Bigelow, Bigelow & William Charles Schroeder, Schroeder, 1962) (Plain pygmy skate) * ''Fenestraja maceachrani'' (Bernard Séret, Séret, 1989) (Madagascar pygmy skate) * ''Fe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cruriraja
''Cruriraja'' is a genus of skates in the family Gurgesiellidae.Weigmann, S., Séret, B., Last, P.R. & McEachran, J.D. 2016. Pygmy Skates, Family Gurgesiellidae. Pp. 473–493 in Last, P.R., White, W.T., Carvalho, M.R., Séret, B., Stehmann, M. & Naylor, G.J.P. (eds.). Rays of the World. CSIRO Publishing: Melbourne. . Reference page. They are primarily found in the warm West Atlantic (including the Caribbean and Gulf of Mexico) and off southern Africa, but ''C. andamanica'' is from the Indian Ocean. Species * '' Cruriraja andamanica'' ( Lloyd, 1909) (Andaman leg skate) * '' Cruriraja atlantis'' Bigelow & Schroeder, 1948 (Atlantic leg skate) * '' Cruriraja cadenati'' Bigelow & Schroeder, 1962 (Broadfoot leg skate) * '' Cruriraja durbanensis'' ( von Bonde & Swart, 1923) (Smoothnose leg skate) * '' Cruriraja hulleyi'' Aschliman, Ebert & Compagno, 2010 * '' Cruriraja parcomaculata'' ( von Bonde & Swart, 1923) (Roughnose leg skate) * '' Cruriraja poeyi'' Bigelow & Schroeder, 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gurgesiella
''Gurgesiella'' is a genus of fish in the family Gurgesiellidae. These relatively small deep-water skates are found in the Atlantic and Pacific Oceans off South and Central America.Weigmann, S., Séret, B., Last, P.R. & McEachran, J.D. 2016. Pygmy Skates, Family Gurgesiellidae. Pp. 473–493 in Last, P.R., White, W.T., Carvalho, M.R., Séret, B., Stehmann, M. & Naylor, G.J.P. (eds.). Rays of the World. CSIRO Publishing: Melbourne. . Reference page. Species * '' Gurgesiella atlantica'' ( Bigelow & Schroeder, 1962) (Atlantic pygmy skate) * '' Gurgesiella dorsalifera'' McEachran & Compagno, 1980 (Onefin skate) * ''Gurgesiella furvescens The dusky finless skate (''Gurgesiella furvescens'') is a species of fish in the family Gurgesiellidae. It is found in the western Pacific Ocean off Chile, Ecuador, and Peru. Its natural habitat is open sea The sea, connected as the world ...'' F. de Buen, 1959 (Dusky finless skate) References * Rajidae Ray genera Taxa na ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fenestraja Plutonia
''Fenestraja plutonia'' is a species of cartilaginous fish in the family Gurgesiellidae. It is commonly known as the underworld windowskate or Pluto pygmy skate. The underworld windowskate is known from patches of continental slope in the western Atlantic Ocean between the coasts of the southern United States and Suriname. Etymology The underworld windowskate's genus name, ''Fenestraja'', comes from a combination of two words. is a Latin word meaning window, which in this case refers to a small opening in bone.Romero, P., 2002. An etymological dictionary of taxonomy. Madrid, unpublished. A second Latin word, ''Raja'' simply refers to the genus as a skate/ray of the family Rajidae. Its species name is a reference to Pluto ( grc, Πλούτων, ) the Greek god of the underworld.William Hansen, Classical Mythology: A Guide to the Mythical World of the Greeks and Romans. Oxford University Press, 2005 Taxonomy The underworld windowskate was initially described by Samuel Garman in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Batoidea
Batoidea is a superorder of cartilaginous fishes, commonly known as rays. They and their close relatives, the sharks, comprise the subclass Elasmobranchii. Rays are the largest group of cartilaginous fishes, with well over 600 species in 26 families. Rays are distinguished by their flattened bodies, enlarged pectoral fins that are fused to the head, and gill slits that are placed on their ventral surfaces. Anatomy Batoids are flat-bodied, and, like sharks, are cartilaginous fish, meaning they have a boneless skeleton made of a tough, elastic cartilage. Most batoids have five ventral slot-like body openings called gill slits that lead from the gills, but the Hexatrygonidae have six. Batoid gill slits lie under the pectoral fins on the underside, whereas a shark's are on the sides of the head. Most batoids have a flat, disk-like body, with the exception of the guitarfishes and sawfishes, while most sharks have a spindle-shaped body. Many species of batoid have developed their pe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ray (fish)
Batoidea is a superorder of cartilaginous fishes, commonly known as rays. They and their close relatives, the sharks, comprise the subclass Elasmobranchii. Rays are the largest group of cartilaginous fishes, with well over 600 species in 26 families. Rays are distinguished by their flattened bodies, enlarged pectoral fins that are fused to the head, and gill slits that are placed on their ventral surfaces. Anatomy Batoids are flat-bodied, and, like sharks, are cartilaginous fish, meaning they have a boneless skeleton made of a tough, elastic cartilage. Most batoids have five ventral slot-like body openings called gill slits that lead from the gills, but the Hexatrygonidae have six. Batoid gill slits lie under the pectoral fins on the underside, whereas a shark's are on the sides of the head. Most batoids have a flat, disk-like body, with the exception of the guitarfishes and sawfishes, while most sharks have a spindle-shaped body. Many species of batoid have developed their p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Manganese Nodule
Polymetallic nodules, also called manganese nodules, are mineral concretions on the sea bottom formed of concentric layers of iron and manganese hydroxides around a core. As nodules can be found in vast quantities, and contain valuable metals, deposits have been identified as a potential economic interest. Nodules vary in size from tiny particles visible only under a microscope to large pellets more than across. However, most nodules are between in diameter, about the size of hen's eggs or potatoes. Their surface textures vary from smooth to rough. They frequently have botryoidal (mammillated or knobby) texture and vary from spherical in shape to typically oblate (flying saucer), sometimes prolate (Rugby ball), or are otherwise irregular. The bottom surface, buried in sediment, is generally rougher than the top due to a different type of growth. Occurrence Nodules lie on the seabed sediment, often partly or completely buried. They vary greatly in abundance, in some cases ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chondrichthyes
Chondrichthyes (; ) is a class that contains the cartilaginous fishes that have skeletons primarily composed of cartilage. They can be contrasted with the Osteichthyes or ''bony fishes'', which have skeletons primarily composed of bone tissue. Chondrichthyes are jawed vertebrates with paired fins, paired nares, scales, and a heart with its chambers in series. Extant chondrichthyes range in size from the 10 cm (3.9 in) finless sleeper ray to the 10 m (32 ft) whale shark. The class is divided into two subclasses: Elasmobranchii (sharks, rays, skates, and sawfish) and Holocephali ( chimaeras, sometimes called ghost sharks, which are sometimes separated into their own class). Within the infraphylum Gnathostomata, cartilaginous fishes are distinct from all other jawed vertebrates. Anatomy Skeleton The skeleton is cartilaginous. The notochord is gradually replaced by a vertebral column during development, except in Holocephali, where the notochord stays intact. In some deepwat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Family (biology)
Family ( la, familia, plural ') is one of the eight major hierarchical taxonomic ranks in Linnaean taxonomy. It is classified between order and genus. A family may be divided into subfamilies, which are intermediate ranks between the ranks of family and genus. The official family names are Latin in origin; however, popular names are often used: for example, walnut trees and hickory trees belong to the family Juglandaceae, but that family is commonly referred to as the "walnut family". What belongs to a family—or if a described family should be recognized at all—are proposed and determined by practicing taxonomists. There are no hard rules for describing or recognizing a family, but in plants, they can be characterized on the basis of both vegetative and reproductive features of plant species. Taxonomists often take different positions about descriptions, and there may be no broad consensus across the scientific community for some time. The publishing of new data and opini ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ray Families
Ray may refer to: Fish * Ray (fish), any cartilaginous fish of the superorder Batoidea * Ray (fish fin anatomy), a bony or horny spine on a fin Science and mathematics * Ray (geometry), half of a line proceeding from an initial point * Ray (graph theory), an infinite sequence of vertices such that each vertex appears at most once in the sequence and each two consecutive vertices in the sequence are the two endpoints of an edge in the graph * Ray (optics), an idealized narrow beam of light * Ray (quantum theory), an equivalence class of state-vectors representing the same state Arts and entertainment Music * The Rays, an American musical group active in the 1950s * Ray (musician), stage name of Japanese singer Reika Nakayama (born 1990) * Ray J, stage name of singer William Ray Norwood, Jr. (born 1981) * ''Ray'' (Bump of Chicken album) * ''Ray'' (Frazier Chorus album) * ''Ray'' (L'Arc-en-Ciel album) * ''Rays'' (Michael Nesmith album) (former Monkee) * ''Ray'' (soundtrack), a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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