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Urogymnus
''Urogymnus'' is a genus of stingrays in the family Dasyatidae from marine, brackish and freshwater habitats in the Indo-Pacific and tropical East Atlantic regions. The genus was previously considered to be monotypic, containing only the porcupine ray (''U. asperrimus''). Molecular phylogenetic research published in 2016 reassigned several species from ''Himantura'' to ''Urogymnus''. Species *'' Urogymnus acanthobothrium'' Last, White & Kyne, 2016 (Mumburarr whipray) *'' Urogymnus asperrimus'' ( Bloch & J. G. Schneider, 1801) (Porcupine ray) *'' Urogymnus dalyensis'' (Last & Manjaji-Matsumoto, 2008) (Freshwater whipray) *'' Urogymnus granulatus'' ( Macleay, 1883) (Mangrove whipray) *'' Urogymnus lobistoma'' ( Manjaji-Matsumoto & 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 iro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Urogymnus Poecilura
''Urogymnus'' is a genus of stingrays in the family (biology), family Dasyatidae from marine, brackish and freshwater habitats in the Indo-Pacific and tropical East Atlantic regions. The genus was previously considered to be monotypic, containing only the porcupine ray (''U. asperrimus''). Molecular phylogenetic research published in 2016 reassigned several species from ''Himantura'' to ''Urogymnus''. Species *''Urogymnus acanthobothrium'' Peter R. Last, Last, William Toby White, White & Peter M Kyne, Kyne, 2016 (Mumburarr whipray) *''Porcupine ray, Urogymnus asperrimus'' (Marcus Elieser Bloch, Bloch & Johann Gottlob Schneider, J. G. Schneider, 1801) (Porcupine ray) *''Freshwater whipray, Urogymnus dalyensis'' (Peter R. Last, Last & Bernadette Mabel Manjaji-Matsumoto, Manjaji-Matsumoto, 2008) (Freshwater whipray) *''Mangrove whipray, Urogymnus granulatus'' (William John Macleay, Macleay, 1883) (Mangrove whipray) *''Tubemouth whipray, Urogymnus lobistoma'' (Bernadette Mabel Manjaj ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Urogymnus Natalensis
''Urogymnus'' is a genus of stingrays in the family Dasyatidae from marine, brackish and freshwater habitats in the Indo-Pacific and tropical East Atlantic regions. The genus was previously considered to be monotypic, containing only the porcupine ray (''U. asperrimus''). Molecular phylogenetic Molecular phylogenetics () is the branch of phylogeny that analyzes genetic, hereditary molecular differences, predominantly in DNA sequences, to gain information on an organism's evolutionary relationships. From these analyses, it is possible to ... research published in 2016 reassigned several species from ''Himantura'' to ''Urogymnus''. Species *''Urogymnus acanthobothrium'' Peter R. Last, Last, William Toby White, White & Peter M Kyne, Kyne, 2016 (Mumburarr whipray) *''Porcupine ray, Urogymnus asperrimus'' (Marcus Elieser Bloch, Bloch & Johann Gottlob Schneider, J. G. Schneider, 1801) (Porcupine ray) *''Freshwater whipray, Urogymnus dalyensis'' (Peter R. Last, Last & Bernadett ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Porcupine Ray
The porcupine ray (''Urogymnus asperrimus'') is a rare species of stingray in the family (biology), family Dasyatidae. This benthic fish, bottom-dweller is found throughout the tropical Indo-Pacific, as well as off West Africa. It favors sand, coral rubble, and seagrass habitats in inshore waters to a depth of . A large and heavy-bodied species reaching in width, the porcupine ray has a nearly circular, plain-colored pectoral fin disc and a thin tail without any fin folds. Uniquely within its family, it lacks a venomous stinging spine. However, an adult ray can still defend itself ably with the many large, sharp thorns found over its disc and tail. The diet of the porcupine ray consists mainly of benthic invertebrates and bony fishes, which it digs up from the sea floor. It is aplacental viviparous, in which the developing embryos are nourished by histotroph ("uterine milk") produced by the mother. The porcupine ray has long been valued for its rough and durable skin, which was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Porcupine Ray
The porcupine ray (''Urogymnus asperrimus'') is a rare species of stingray in the family (biology), family Dasyatidae. This benthic fish, bottom-dweller is found throughout the tropical Indo-Pacific, as well as off West Africa. It favors sand, coral rubble, and seagrass habitats in inshore waters to a depth of . A large and heavy-bodied species reaching in width, the porcupine ray has a nearly circular, plain-colored pectoral fin disc and a thin tail without any fin folds. Uniquely within its family, it lacks a venomous stinging spine. However, an adult ray can still defend itself ably with the many large, sharp thorns found over its disc and tail. The diet of the porcupine ray consists mainly of benthic invertebrates and bony fishes, which it digs up from the sea floor. It is aplacental viviparous, in which the developing embryos are nourished by histotroph ("uterine milk") produced by the mother. The porcupine ray has long been valued for its rough and durable skin, which was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Urogymnus Africanus
The porcupine ray (''Urogymnus asperrimus'') is a rare species of stingray in the family Dasyatidae. This bottom-dweller is found throughout the tropical Indo-Pacific, as well as off West Africa. It favors sand, coral rubble, and seagrass habitats in inshore waters to a depth of . A large and heavy-bodied species reaching in width, the porcupine ray has a nearly circular, plain-colored pectoral fin disc and a thin tail without any fin folds. Uniquely within its family, it lacks a venomous stinging spine. However, an adult ray can still defend itself ably with the many large, sharp thorns found over its disc and tail. The diet of the porcupine ray consists mainly of benthic invertebrates and bony fishes, which it digs up from the sea floor. It is aplacental viviparous, in which the developing embryos are nourished by histotroph ("uterine milk") produced by the mother. The porcupine ray has long been valued for its rough and durable skin, which was made into a shagre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Urogymnus Africana
The porcupine ray (''Urogymnus asperrimus'') is a rare species of stingray in the family Dasyatidae. This bottom-dweller is found throughout the tropical Indo-Pacific, as well as off West Africa. It favors sand, coral rubble, and seagrass habitats in inshore waters to a depth of . A large and heavy-bodied species reaching in width, the porcupine ray has a nearly circular, plain-colored pectoral fin disc and a thin tail without any fin folds. Uniquely within its family, it lacks a venomous stinging spine. However, an adult ray can still defend itself ably with the many large, sharp thorns found over its disc and tail. The diet of the porcupine ray consists mainly of benthic invertebrates and bony fishes, which it digs up from the sea floor. It is aplacental viviparous, in which the developing embryos are nourished by histotroph ("uterine milk") produced by the mother. The porcupine ray has long been valued for its rough and durable skin, which was made into a shagre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Urogymnus Rhombeus
The porcupine ray (''Urogymnus asperrimus'') is a rare species of stingray in the family Dasyatidae. This bottom-dweller is found throughout the tropical Indo-Pacific, as well as off West Africa. It favors sand, coral rubble, and seagrass habitats in inshore waters to a depth of . A large and heavy-bodied species reaching in width, the porcupine ray has a nearly circular, plain-colored pectoral fin disc and a thin tail without any fin folds. Uniquely within its family, it lacks a venomous stinging spine. However, an adult ray can still defend itself ably with the many large, sharp thorns found over its disc and tail. The diet of the porcupine ray consists mainly of benthic invertebrates and bony fishes, which it digs up from the sea floor. It is aplacental viviparous, in which the developing embryos are nourished by histotroph ("uterine milk") produced by the mother. The porcupine ray has long been valued for its rough and durable skin, which was made into a shagre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Urogymnus Acanthobothrium
The mumburarr whipray (''Urogymnus acanthobothrium'') is a species of whipray from northern Australia and southern Papua New Guinea, described in 2016. Discovery The first tissue sample was collected in 1999 by scientists funded by the American National Science Foundation, who were researching fish tapeworms. Further specimens were collected under the (Australian) National Environmental Research Program and by observers from the National Fisheries Authority in Papua New Guinea. It was formally described in 2016. Etymology ''Mumburarr'', meaning 'stingray', was chosen to recognise the assistance of native traditional landowowners in locating specimens. It is a term from the Limilngan language used by the Minitja people of the West Alligator River region. The epithet ''acanthobothrium'' recognises the role of the parasite project in discovering this whipray. They found four species of ''Acanthobothrium'' cestodes unique to this host. Description The ray is very large, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Giant Freshwater Stingray
The giant freshwater stingray (''Urogymnus polylepis'', also widely known by the junior synonym ''Himantura chaophraya'') is a species of stingray in the family Dasyatidae. It is found in large rivers and estuaries in Southeast Asia and Borneo, though historically it may have been more widely distributed in South and Southeast Asia. The largest freshwater fish and the largest stingray in the world, this species grows up to across and can reach up to in weight. It has a relatively thin, oval pectoral fin disc that is widest anteriorly, and a sharply pointed snout with a protruding tip. Its tail is thin and whip-like, and lacks fin folds. This species is uniformly grayish brown above and white below; the underside of the pectoral and pelvic fins bear distinctive wide, dark bands on their posterior margins. Bottom-dwelling in nature, the giant freshwater stingray inhabits sandy or muddy areas and preys on small fishes and invertebrates. Females give live birth to litters of one ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tubemouth Whipray
The tubemouth whipray (''Urogymnus lobistoma'') is a little-known species of Myliobatiformes, stingray in the family (biology), family Dasyatidae, named for its distinctive, highly protrusible jaws. It is found in shallow, brackish water near mangrove forests and large river mouths along the coasts of southwestern Borneo and southern Sumatra. Measuring up to across, this species has a diamond-shaped pectoral fin disc with an elongated, pointed snout and broadly rounded outer corners. The upper surface of the disc is a plain grayish or brownish in color, and covered by small, flattened dermal denticles. The tubemouth whipray is relatively common at present, but is heavily pressured by habitat degradation and coastal fisheries. The International Union for Conservation of Nature (IUCN) has listed it as Vulnerable species, Vulnerable. Taxonomy The first known specimens of the tubemouth whipray were caught from the South China Sea in 1999, and initially thought to be ''Smalleye whip r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mangrove Whipray
The mangrove whipray (''Urogymnus granulatus'') or whitetail stingray, is a species of stingray in the family (biology), family Dasyatidae. It is widely distributed in the Indo-Pacific region from the Red Sea to northern Australia and Micronesia. A benthic fish, benthic inhabitant of shallow inshore waters, juvenile mangrove whiprays favor mangrove and estuary, estuarine habitats, while adults favor sandy to rocky areas in lagoons and coral reefs. This species can be identified by its thick, oval pectoral fin disc that is dark gray above with numerous white flecks, and by its relatively short, whip-like tail that is white past the stinging spine. It grows up to across. Solitary in nature, the mangrove whipray preys mainly on small, benthic, bottom-dwelling bony fishes and invertebrates. It is, like other stingrays, aplacental viviparous, with the females nourishing their unborn young via histotroph ("uterine milk"). The mangrove whipray is caught for its meat, shagreen, skin, an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Freshwater Whipray
The freshwater whipray (''Urogymnus dalyensis'') is a little-known species of stingray in the family Dasyatidae, found in a number of large rivers and associated estuaries in northern Australia. Until recently, this species was regarded as a regional subpopulation of the similar-looking but much larger giant freshwater stingray (''U. polylepsis'') of Southeast Asia. Typically reaching across, the freshwater whipray has a distinctively shaped, rounded pectoral fin disc, a projecting snout, and a thin tail without fin folds. It is plain brown above and white below with dark marginal bands. It may occasionally travel onto land and can "breathe" out of water for up to 7 minutes. The freshwater whipray is an active hunter of small fishes and shrimps, and does not currently face substantial conservation threats. Taxonomy The first known specimen of the freshwater whipray was caught during a 1989 scientific expedition from the Daly River, after which it would eventually be named. Vari ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
