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Guitarfish
The guitarfish, also referred to as shovelnose rays, are a family, Rhinobatidae, of rays. The guitarfish are known for an elongated body with a flattened head and trunk and small, ray-like wings. The combined range of the various species is tropical, subtropical, and warm temperate waters worldwide. Names In Australia and New Zealand, guitarfish are commonly referred to as shovelnose rays or shovelnose sharks. Description Guitarfish have a body from intermediate between those of sharks and rays. The tail has a typical shark-like form, but in many species, the head has a triangular, or guitar-like shape, rather than the disc-shape formed by fusion with the pectoral fins found in other rays. Reproduction Guitarfish are ovoviviparous; the embryo matures inside an egg within the mother until it is ready to hatch. This is typical of rays. Habitat Guitarfish are bottom feeders that bury themselves in mud or sand and eat worms, crabs, and clams. Some can tolerate salt, fresh, and br ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shovelnose Guitarfish
The shovelnose guitarfish, ''Rhinobatos productus'', is a ray in the family Rhinobatidae. It becomes mature at an estimated seven to eight years old. Males are between 90 and 100 cm long, while females are around 99 cm at that age.Timmons, M and Bray, R. Age, growth, and sexual maturity of shovelnose guitarfish, Rhinobatos productus. ''Fishery Bulletin'' 95:349–359 (1997). The ray can live up to 11 years, and full-grown sizes are around 120 cm for males, and females reach 137 cm. They range from central south to t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhinobatos
''Rhinobatos'' is a genus of fish in the Rhinobatidae family. Although previously used to encompass all guitarfishes, it was found to be polyphyletic, and recent authorities have transferred many species included in the genus to ''Acroteriobatus'', '' Glaucostegus'', and ''Pseudobatos''. Species The 15 currently recognized species in this genus are: * '' Rhinobatos albomaculatus'' Norman, 1930 (White-spotted guitarfish) * ''Rhinobatos annandalei'' Norman, 1926 (Annandale's guitarfish) * '' Rhinobatos borneensis'' Last, Séret & Naylor, 2016 (Borneo guitarfish) * '' Rhinobatos holcorhynchus'' Norman, 1922 (Slender guitarfish) * '' Rhinobatos hynnicephalus'' J. Richardson, 1846 (Ringstreaked guitarfish) * '' Rhinobatos irvinei'' Norman, 1931 (Spineback guitarfish) * '' Rhinobatos jimbaranensis'' Last, W. T. White & Fahmi, 2006 (Jimbaran shovelnose ray) * '' Rhinobatos lionotus'' Norman, 1926 (Smoothback guitarfish) * '' Rhinobatos nudidorsalis'' Last, Compagno & Nakaya, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acroteriobatus
''Acroteriobatus'' is a genus of fish in the Rhinobatidae family. Although its constituent species were previously assigned to '' Rhinobatos'', recent authors treat it as distinct. They are found near the shore off southern Africa and in the northwestern Indian Ocean. They are brownish above, often with a spotted pattern, and reach up to depending on the exact species. Species There are eight currently recognized species in this genus: * ''Acroteriobatus andysabini'' (2021) (Malagasy blue-spotted guitarfish) * ''Acroteriobatus annulatus'' ( J. P. Müller & Henle, 1841) (Lesser guitarfish) * ''Acroteriobatus blochii'' ( J. P. Müller & Henle, 1841) (Bluntnose guitarfish) * ''Acroteriobatus leucospilus'' ( Norman, 1926) (Grayspotted guitarfish) * ''Acroteriobatus ocellatus'' ( Norman, 1926) (Speckled guitarfish) * ''Acroteriobatus omanensis'' Last, Hendeson & Naylor, 2016 (Oman guitarfish) * ''Acroteriobatus salalah'' ( J. E. Randall & Compagno, 1995) (Salalah guitarfish) * ''A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pseudobatos
''Pseudobatos'' is a genus of fish in the Rhinobatidae family. Although its constituent species were previously assigned to '' Rhinobatos'', recent authors treat it as distinct. They are found in warmer coastal parts of the Americas, ranging from northern Chile to California (USA) on the Pacific side, and from northeastern Argentina to North Carolina (USA) on the Atlantic side. They are brownish or grayish above, and reach up to depending on the exact species. Species There are nine currently recognized species in this genus: * '' Pseudobatos buthi'' K.M. Rutledge, 2019 (Spadenose guitarfish) * '' Pseudobatos glaucostigmus'' ( D. S. Jordan & C. H. Gilbert, 1883) (Speckled guitarfish) * ''Pseudobatos horkelii'' ( J. P. Müller & Henle, 1841) (Brazilian guitarfish) * '' Pseudobatos lentiginosus'' (Garman, 1880) (Atlantic guitarfish) * '' Pseudobatos leucorhynchus'' ( Günther, 1867) (Whitesnout guitarfish) * '' Pseudobatos percellens'' ( Walbaum, 1792) (Chola guitarfish) * '' P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sawfish
Sawfish, also known as carpenter sharks, are a family of rays characterized by a long, narrow, flattened rostrum, or nose extension, lined with sharp transverse teeth, arranged in a way that resembles a saw. They are among the largest fish with some species reaching lengths of about . They are found worldwide in tropical and subtropical regions in coastal marine and brackish estuarine waters, as well as freshwater rivers and lakes. They are endangered. They should not be confused with sawsharks (order Pristiophoriformes) or the extinct sclerorhynchoids (order Rajiformes) which have a similar appearance, or swordfish (family Xiphiidae) which have a similar name but a very different appearance. Sawfishes are relatively slow breeders and the females give birth to live young. They feed on fish and invertebrates that are detected and captured with the use of their saw. They are generally harmless to humans, but can inflict serious injuries with the saw when captured and defendi ... [...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 p ... [...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 the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zapteryx
''Zapteryx'' is a genus of fish in the Rhinobatidae family found in coastal parts of the Americas. Species * †''Zapteryx bichuti'' Signeux, 1961 * ''Zapteryx brevirostris'' J. P. Müller & Henle, 1841 (Shortnose guitarfish) * ''Zapteryx exasperata'' D. S. Jordan & C. H. Gilbert, 1880 (Banded guitarfish) * ''Zapteryx xyster The southern banded guitarfish (''Zapteryx xyster''), also known as the witch guitarfish, is a species of fish in the Rhinobatidae family found at reefs and other habitats from shallow water to a depth of in the tropical East Pacific. It ranges ...'' D. S. Jordan & Evermann, 1896 (Southern banded guitarfish) References Trygonorrhinidae Ray genera Taxa named by David Starr Jordan Taxa named by Charles Henry Gilbert Taxonomy articles created by Polbot {{Rajiformes-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Myledaphus
''Myledaphus'' is a genus of Late Cretaceous cartilaginous fish whose fossils are known from Canada, the Midwest of the United States, Olmos Formation of the Difunta Group of Mexico, and the Beshtyubin and Bissekty Formations of Uzbekistan. It was a freshwater guitarfish that probably reached a length of , and had teeth adapted for a durophagous diet of animals such as clams. Most taxonomic authories place the genus in the Rhinobatidae. Two species are known: ''Myledaphus bipartitus'', the type species, and ''Myledaphus araucanus'', named in 2019. Fossils and age The most common remains of this fish are teeth and vertebra. A study performed on ''Myledaphus'' vertebra from Alberta in 2013 revealed that ''Myledaphus'' had an estimated maximum age of 16 years. This means that ''Myledaphus'' had a shorter lifespan than that of the modern common guitarfish, by a difference of 8 years. See also * List of prehistoric cartilaginous fish This list of prehistoric cartilaginous ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cartilaginous Fish
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 d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chondrichthyan
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 d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aptychotrema
''Aptychotrema'' is a genus of guitarfish, belonging to the family Rhinobatidae. They are found around Australia. Species There are three living species, and one extinct species only known from fossil remains of Cenomanian age.Bernárdez, E. (2002). Los dientes de seláceos del Cretácico de la depresión central asturiana. Univ. d'Oviedo: 1–476. * †'' Aptychotrema massoniae'' Bernardez, 2002 * '' Aptychotrema rostrata'' Shaw, 1794 (Eastern shovelnose ray or Short-snouted shovelnose ray) - synonym: ''Aptychotrema bougainvillii'' J. P. Müller & Henle, 841 * '' Aptychotrema timorensis'' Last A last is a mechanical form shaped like a human foot. It is used by shoemakers and cordwainers in the manufacture and repair of shoes. Lasts typically come in pairs and have been made from various materials, including hardwoods, cast iron, an ..., 2004 (Spotted shovelnose ray) * '' Aptychotrema vincentiana'' Haacke, 1885 (Western shovelnose ray) References Trygonorrhin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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