|
Raja (fish)
''Raja'', also known as ''Raia'', is a genus of Skate (fish), skates in the family (biology), family Rajidae containing 16 species. Formerly a wastebasket genus, many species historically categorized here have been moved to other genera in the family, such as ''Amblyraja'', ''Beringraja'', ''Dipturus'', ''Leucoraja'' and ''Rostroraja''. ''Raja'' are flat-bodied, cartilaginous fish with a rhombic shapes due to their large pectoral fins extending from or near from the snouts to the bases of their tails. Their sharp snouts are produced by a cranial projection of rostral cartilage. The mouth and gills are located on the underside of the body. They may be either solid-coloured or patterned, and most skates have spiny or thornlike structures on the upper surface, while some species contain weak electrical organs within their tails. Mating typically occurs in the spring and the female lays numerous Egg (biology), eggs per clutch which are encapsulated in leathery cases, commonly known as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maastrichtian
The Maastrichtian ( ) is, in the International Commission on Stratigraphy (ICS) geologic timescale, the latest age (geology), age (uppermost stage (stratigraphy), stage) of the Late Cretaceous epoch (geology), Epoch or Upper Cretaceous series (stratigraphy), Series, the Cretaceous geologic period, Period or system (stratigraphy), System, and of the Mesozoic geologic era, Era or Erathem. It spanned the interval from . The Maastrichtian was preceded by the Campanian and succeeded by the Danian (part of the Paleogene and Paleocene). It is named after the city of Maastricht, the capital and largest city of the Limburg (Netherlands), Limburg province in the Netherlands. The Cretaceous–Paleogene extinction event (formerly known as the Cretaceous–Tertiary period, Tertiary extinction event) occurred at the end of this age. In this extinction event, mass extinction, many commonly recognized groups such as non-avian dinosaurs, plesiosaurs and mosasaurs, as well as many other lesser-kn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Egg Case (Chondrichthyes)
An egg case or egg capsule, often colloquially called a mermaid's purse, is the casing that surrounds the eggs of oviparous chondrichthyans. Living chondricthyans that produce egg cases include some sharks, skates and chimaeras. Egg cases typically contain one embryo, except for big skate and mottled skate egg cases, which contain up to 7 embryos. Oviparity is completely absent in the superorder Squalomorphi. Egg cases are also thought to have been produced by some extinct chondrichthyan groups, such as hybodonts and xenacanths. Description Egg cases are made of collagen protein strands, and are often described as feeling rough and leathery. Some egg cases have a fibrous material covering the outside of the egg case, thought to aid in attachment to substrate. Egg cases without a fibrous outer layer can be striated, bumpy, or smooth and glossy. With the exception of bullhead shark eggs, egg cases are typically rectangular in shape with projections, called horns, at eac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Raja Mauritaniensis
''Raja mauritaniensis'', commonly known as the African ray, is a species of ray in the family Rajidae. It is found at depths of in the eastern Atlantic Ocean off Mauritania and Tunisia. This species was described in 1977, but the currently used scientific name is a homonym, preoccupied by ''Raja africana'' , which is a synonym of '' Urogymnus asperrimus''. Consequently, a replacement scientific name is needed for the African ray. Furthermore, the validity of the African ray has been questioned, with some suggesting that its type specimen In biology, a type is a particular wikt:en:specimen, specimen (or in some cases a group of specimens) of an organism to which the scientific name of that organism is formally associated. In other words, a type is an example that serves to ancho ... may be an aberrant '' R. miraletus'' or '' R. straeleni''. References African skate Fish of West Africa Fish of Africa Marine fish of North Africa Fish described in 2021 {{Rajif ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Richard Thomas Lowe
Richard Thomas Lowe (1802–1874) was an English botanist, ichthyologist, malacologist, and clergyman. In 1825 he graduated from Christ's College, Cambridge, and in the same year he took holy orders. In 1832 he became a clergyman in the Madeira Islands, where he was also a part-time naturalist, extensively studying the local flora and fauna. He wrote a book on the Madeiran flora. He died in 1874 when the ship he was on was wrecked off the Isles of Scilly. Taxa Lowe named and described numerous molluscan taxa, including: * '' Caseolus'', a land snail genus and eight species within it * '' Lemniscia'', a land snail A land snail is any of the numerous species of snail that live on land, as opposed to the sea snails and freshwater snails. ''Land snail'' is the common name for terrestrial molluscs, terrestrial gastropod mollusks that have gastropod shell, shel ... genus and two species within it See also * :Taxa named by Richard Thomas Lowe References * Notes 1802 birt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Raja Maderensis
''Raja maderensis'' is a species of hardnose skate. Description Range It has been observed on iNaturalist exclusively in the Açores, so it is possible that it is an endemic species, though not much is known about it. Habitat Ecology Etymology Madeira Madeira ( ; ), officially the Autonomous Region of Madeira (), is an autonomous Regions of Portugal, autonomous region of Portugal. It is an archipelago situated in the North Atlantic Ocean, in the region of Macaronesia, just under north of ..., a Portuguese archipelago in the Atlantic Ocean. Taxonomy References * Lowe, R.T. (1838) A synopsis of the fishes of Madeira, with the principal Synonyms, Portuguese Names, and Characters of the new Genera and Species. Transactions of the Zoological Society of London, 2, 173–200 Taxa named by Richard Thomas Lowe Fish described in 1838 maderensis {{Rajiformes-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gerhard Krefft
Gerhard Krefft (30 March 1912 - 20 March 1993) was a German ichthyologist and herpetologist.Stehmann & Hulley (1994). Family His father was a neurologist, who "was an enthusiastic collector of living reptiles and amphibians", and his mother was a concert singer.Stehmann & Hulley (1994), p.558. He and his wife Ingeborg were married in 1947, and they had three daughters.Stehmann & Hulley (1994), p.559. He was the great-nephew of the zoology, zoologist, paleontology, palaeontologist, and Curator of the Australian Museum, Gerard Krefft, Johann Ludwig (Louis) Gerard Krefft (1830–1881). Professional career He had more than 160 scientific publications, many of which were "milestone contributions to the taxonomy and zoogeography of oceanic fishes".Stehmann & Hulley (1994), p.562. Taxon described by him *See :Taxa named by Gerhard Krefft Taxon named in his honor *''Nemamyxine kreffti'' Charmion B. McMillan, C. B. McMillan & Robert L. Wisner, Wisner, 1982, the Krefft's hagfish, i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Raja Herwigi
Raja (; from , IAST ') is a noble or royal Sanskrit title historically used by some Indian rulers and monarchs and highest-ranking nobles. The title was historically used in the Indian subcontinent and Southeast Asia. The title has a long history in South Asia and Southeast Asia, being attested from the ''Rigveda'', where a ' is a ruler, see for example the ', the "Battle of Ten Kings". The title has equivalent cognates in other Indo-European languages, notably the Latin Rex and the Celtic Rix. Raja-ruled Indian states While most of the Indian salute states (those granted a gun salute by the British Crown) were ruled by a Maharaja (or variation; some promoted from an earlier Raja- or equivalent style), even exclusively from 13 guns up, a number had Rajas: ; Hereditary salutes of 11-guns : * the Raja of Ali Rajpur * the Raja of Bilaspur * the Raja of Chamba * the Raja of Faridkot * the Raja of Jhabua * the Raja of Mandi * the Raja of Manipur * the Raja of Narsing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Louis Augustin Guillaume Bosc
Louis Augustin Guillaume Bosc (or Louis-Augustin Bosc d'Antic) (29 January 1759 – 10 July 1828) was a French botanist, invertebrate zoologist, and entomologist. Biography Bosc was born in Paris, the son of Paul Bosc d’Antic, a medical doctor and chemist. He studied at Dijon, where he was the pupil of botanist Jean-François Durande and chemist Louis-Bernard Guyton-Morveau. Being unable to become an artilleryman, he worked initially for the office of the Controller-General of Finances, controller general and then for the comptroller of the postal service. In time he took courses in botany under Antoine-Laurent de Jussieu and met botanist René Louiche Desfontaines, René Desfontaines and naturalist Pierre Marie Auguste Broussonet. He also took up with Jean-Marie Roland, vicomte de la Platière, Jean Marie Roland and Madame Roland and formed a lasting relationship with Danish entomologist Johan Christian Fabricius. While working for the postal service he carried out work on natu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Raja Eglanteria
The clearnose skate (''Rostroraja eglanteria'') is a species of cartilaginous fish in the family Rajidae. ''R. eglanteria'' is also known by other common names such as the brier skate and summer skate. Clearnose skates are easily identified by the translucent patches on either side of their snouts and their mottled dorsal surface. They are found along the Atlantic and Gulf coasts of the United States in shallow waters of the continental shelf. Taxonomy Clearnose skates are elasmobranchs in the order Rajiformes and family Rajidae. They were one of nearly thirty members of the genus ''Raja'' before redesignation based on DNA analysis in 2016. Clearnose skates were first described as ''Raja eglanteria'' by Bosc in 1800. Other scientific names include ''R. chantenay'', ''R. desmarestia,'' and ''R. diaphanes;'' however, these names rarely appear in the literature. Description Clearnose skates are named for the characteristic light-colored to translucent patches along both sides ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alexandre Lafont , a Portuguese hypocoristic of the name "Alexandre"
{{Disambig ...
Alexandre may refer to: * Alexandre (given name) * Alexandre (surname) * Alexandre (film) See also * Alexander * Alexandra (other) * Xano (other) Xano is the name of: * Xano, a Portuguese hypocoristic of the name " Alexandre (other)" * Idálio Alexandre Ferreira (born 1983), Portuguese footballer known as "Xano", currently playing for Sligo Rovers {{hndis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Raja Brachyura
The blonde ray or blonde skate (''Raja brachyura'') is a species of ray fish in the family Rajidae. Distribution The blonde ray lives in the Eastern Atlantic Ocean, at depths of 10–380 m. It is found occasionally in the Mediterranean Sea as well. Blonde rays look like what you would expect from their name. Light brown with a few creamy-white blotches and dense dark spots which extend up to the very edge of the disc and on the tail Description Like all rays, the blonde ray has a flattened body with broad, wing-like pectoral fins. The body is kite-shaped with a short tail (hence the specific name ''brachyura'', from Ancient Greek words meaning "short tail").They are found anywhere from the western isles of Scotland to Morocco and can be found in the northern and western Mediterranean. Maximum length is . Habitat Blonde rays are considered bottom dwelling species that like more sandy and muddy areas. As with many elasmobranch species, shallow coastal waters are used ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
François Étienne Delaroche
François () is a French masculine given name and surname, equivalent to the English name Francis. People with the given name * François Amoudruz (1926–2020), French resistance fighter * François-Marie Arouet (better known as Voltaire; 1694–1778), French Enlightenment writer, historian, and philosopher * François Beauchemin (born 1980), Canadian ice hockey player for the Anaheim Ducks * François Blanc (1806–1877), French entrepreneur and operator of casinos * François Bonlieu (1937–1973), French alpine skier * François Cevert (1944–1973), French racing driver * François Chau (born 1959), Cambodian American actor * François Clemmons (born 1945), American singer and actor * François Corbier (1944–2018), French television presenter and songwriter * François Coty (1874–1934), French perfumer * François Coulomb the Elder (1654–1717), French naval architect * François Coulomb the Younger (1691–1751), French naval architect * François Couperin (1668–17 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
