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Hans Severin Holten
Johan Severin Holten (11 July 1770 – 30 December 1805) was a Danish zoological writer, brother of Nicolai Holten, who was to become a Geheimrat, a high-ranking advisor at the imperial courts of the Holy Roman Empire. Biography He was the son of a pharmacist in Helsingør, Johannes Holten (1741–1816) and his wife Anna Margrethe, born Abildgaard (1747–1826). He was born in Helsingør on 11 July 1770, and was named Johan after his father, but preferred to be known as Hans. During his upbringing and in his youth, he lived in the house of the Pentecostal priest P.D. Bast who was married to his aunt. In 1788, he became a student of the Nykøbing School, where he studied zoology. Later, he became the curator of scientific collections made by Prince Christian Frederik, who was later to become Christian VIII of Denmark. In 1801 he took up the post of science tutor for Prince Christian's younger brother, Prince Ferdinand, and at this time he lived at the royal residence of Sorg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geheimrat
''Geheimrat'' was the title of the highest advising officials at the Imperial, royal or princely courts of the Holy Roman Empire, who jointly formed the ''Geheimer Rat'' reporting to the ruler. The term remained in use during subsequent monarchic reigns in German-speaking areas of Europe until the end of the First World War. At its origin the literal meaning of the word in German was 'trusted advisor' - the word "geheim" (secret) implying that such an advisor could be trusted with the Monarch's secrets (similar to "secretary" in English being linguistically related to "secret"). The English-language equivalent is Privy Councillor. The office contributing to the state's politics and legislation had its roots in the age of absolutism from the 17th century onward, when a governmental administration by a dependent bureaucracy was established similar to the French '' Conseil du Roi''. A precursor was the '' Reichshofrat'', a judicial body established by Emperor Maximilian I of Habsbu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pennella Exocoeti
''Pennella exocoeti'' is a large ectoparasitic copepod, a specialist parasite of flying fish. The adult female copepod clings to the fish's gills or skin and feeds on its body fluids. Taxonomy ''Pennella exocoeti'' was first described by the Danish zoologist Hans Severin Holten in 1802 from a specimen probably found on the mirrorwing flyingfish (''Hirundichthys speculiger''). He called it a "gill worm" and recognised that it had close affinities with '' Chondracanthus merluccii'', another "gill worm" found on a member of the cod family Gadidae, but he did not realise they were both copepods. Another species was described by the French naturalist Charles Alexandre Lesueur as ''Pennella blainvilli'' from the tropical two-wing flyingfish (''Exocoetus volitans''), but that has since been determined to be a synonym of ''P. exocoeti''. Description This is a large copepod that may grow to a length of . The mature female found attached to its host bears little resemblance to a free-liv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
18th-century Biologists
The 18th century lasted from January 1, 1701 ( MDCCI) to December 31, 1800 ( MDCCC). During the 18th century, elements of Enlightenment thinking culminated in the American, French, and Haitian Revolutions. During the century, slave trading and human trafficking expanded across the shores of the Atlantic, while declining in Russia, China, and Korea. Revolutions began to challenge the legitimacy of monarchical and aristocratic power structures, including the structures and beliefs that supported slavery. The Industrial Revolution began during mid-century, leading to radical changes in human society and the environment. Western historians have occasionally defined the 18th century otherwise for the purposes of their work. For example, the "short" 18th century may be defined as 1715–1789, denoting the period of time between the death of Louis XIV of France and the start of the French Revolution, with an emphasis on directly interconnected events. To historians who expand the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
18th-century Danish Scientists
The 18th century lasted from January 1, 1701 (Roman numerals, MDCCI) to December 31, 1800 (Roman numerals, MDCCC). During the 18th century, elements of Age of Enlightenment, Enlightenment thinking culminated in the American Revolution, American, French Revolution, French, and Haitian Revolution, Haitian Revolutions. During the century, History of slavery, slave trading and human trafficking expanded across the shores of the Atlantic Ocean, Atlantic, while declining in Russian Empire, Russia, Qing dynasty, China, and Joseon, Korea. Revolutions began to challenge the legitimacy of monarchical and aristocratic power structures, including the structures and beliefs that Proslavery, supported slavery. The Industrial Revolution began during mid-century, leading to radical changes in Society, human society and the Natural environment, environment. Western historians have occasionally defined the 18th century otherwise for the purposes of their work. For example, the "short" 18th cen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
People From Helsingør
A person ( : people) is a being that has certain capacities or attributes such as reason, morality, consciousness or self-consciousness, and being a part of a culturally established form of social relations such as kinship, ownership of property, or legal responsibility. The defining features of personhood and, consequently, what makes a person count as a person, differ widely among cultures and contexts. In addition to the question of personhood, of what makes a being count as a person to begin with, there are further questions about personal identity and self: both about what makes any particular person that particular person instead of another, and about what makes a person at one time the same person as they were or will be at another time despite any intervening changes. The plural form "people" is often used to refer to an entire nation or ethnic group (as in "a people"), and this was the original meaning of the word; it subsequently acquired its use as a plural form of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1805 Deaths
Eighteen or 18 may refer to: * 18 (number), the natural number following 17 and preceding 19 * one of the years 18 BC, AD 18, 1918, 2018 Film, television and entertainment * ''18'' (film), a 1993 Taiwanese experimental film based on the short story ''God's Dice'' * ''Eighteen'' (film), a 2005 Canadian dramatic feature film * 18 (British Board of Film Classification), a film rating in the United Kingdom, also used in Ireland by the Irish Film Classification Office * 18 (''Dragon Ball''), a character in the ''Dragon Ball'' franchise * "Eighteen", a 2006 episode of the animated television series ''12 oz. Mouse'' Music Albums * ''18'' (Moby album), 2002 * ''18'' (Nana Kitade album), 2005 * '' 18...'', 2009 debut album by G.E.M. Songs * "18" (5 Seconds of Summer song), from their 2014 eponymous debut album * "18" (One Direction song), from their 2014 studio album ''Four'' * "18", by Anarbor from their 2013 studio album '' Burnout'' * "I'm Eighteen", by Alice Cooper common ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1770 Births
Year 177 ( CLXXVII) was a common year starting on Tuesday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Commodus and Plautius (or, less frequently, year 930 ''Ab urbe condita''). The denomination 177 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years. Events By place Roman Empire * Lucius Aurelius Commodus Caesar (age 15) and Marcus Peducaeus Plautius Quintillus become Roman Consuls. * Commodus is given the title ''Augustus'', and is made co-emperor, with the same status as his father, Marcus Aurelius. * A systematic persecution of Christians begins in Rome; the followers take refuge in the catacombs. * The churches in southern Gaul are destroyed after a crowd accuses the local Christians of practicing cannibalism. * Forty-seven Christians are martyred in Lyon (Saint Blandina and Pothinus, bishop o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Danish Biologists
Danish may refer to: * Something of, from, or related to the country of Denmark People * A national or citizen of Denmark, also called a "Dane," see Demographics of Denmark * Culture of Denmark * Danish people or Danes, people with a Danish ancestral or ethnic identity * A member of the Danes, a Germanic tribe * Danish (name), a male given name and surname Language * Danish language, a North Germanic language used mostly in Denmark and Northern Germany * Danish tongue or Old Norse, the parent language of all North Germanic languages Food * Danish cuisine * Danish pastry, often simply called a "Danish" See also * Dane (other) * * Gdańsk * List of Danes * Languages of Denmark The Kingdom of Denmark has only one official language, Danish, the national language of the Danish people, but there are several minority languages spoken, namely Faroese, German, and Greenlandic. A large majority (about 86%) of Danes also s ... {{disambiguation Language a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flying Fish
The Exocoetidae are a family of marine fish in the order Beloniformes class Actinopterygii, known colloquially as flying fish or flying cod. About 64 species are grouped in seven to nine genera. While they cannot fly in the same way a bird does, flying fish can make powerful, self-propelled leaps out of the water where their long wing-like fins enable gliding for considerable distances above the water's surface. The main reason for this behavior is thought to be to escape from underwater predators, which include swordfish, mackerel, tuna, and marlin, among others, though their periods of flight expose them to attack by avian predators such as frigate birds. Barbados is known as "the land of the flying fish", and the fish is one of the national symbols of the country. The Exocet missile is named after them, as variants are launched from underwater, and take a low trajectory, skimming the surface, before striking their targets. Etymology The term Exocoetidae is both the scie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Holy Roman Empire
The Holy Roman Empire was a Polity, political entity in Western Europe, Western, Central Europe, Central, and Southern Europe that developed during the Early Middle Ages and continued until its Dissolution of the Holy Roman Empire, dissolution in 1806 during the Napoleonic Wars. From the accession of Otto I in 962 until the twelfth century, the Empire was the most powerful monarchy in Europe. Andrew Holt characterizes it as "perhaps the most powerful European state of the Middle Ages". The functioning of government depended on the harmonic cooperation (dubbed ''consensual rulership'' by Bernd Schneidmüller) between monarch and vassals but this harmony was disturbed during the Salian Dynasty, Salian period. The empire reached the apex of territorial expansion and power under the House of Hohenstaufen in the mid-thirteenth century, but overextending led to partial collapse. On 25 December 800, Pope Leo III crowned the List of Frankish kings, Frankish king Charlemagne as Carolingi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chondracanthus Merluccii
''Chondracanthus merluccii'' is a species of copepod in the family ''Chondracanthidae''. It is a host-specific ectoparasite of the European hake (''Merluccius merluccius''). It was first described in 1802 by the Danish zoologist Hans Severin Holten Johan Severin Holten (11 July 1770 – 30 December 1805) was a Danish zoological writer, brother of Nicolai Holten, who was to become a Geheimrat, a high-ranking advisor at the imperial courts of the Holy Roman Empire. Biography He was the son of ... who named it ''Lernaea merluccii''. Ecology Both adult females and adult males cling onto the lining of the floor of the mouth and onto the gills of the host fish. References {{Taxonbar, from=Q4283537 Poecilostomatoida Parasitic crustaceans Ectoparasites Animal parasites of fish Crustaceans described in 1802 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species Description
A species description is a formal description of a newly discovered species, usually in the form of a scientific paper. Its purpose is to give a clear description of a new species of organism and explain how it differs from species that have been described previously or are related. In order for species to be validly described, they need to follow guidelines established over time. Zoological naming requires adherence to the ICZN code, plants, the ICN, viruses ICTV, and so on. The species description often contains photographs or other illustrations of type material along with a note on where they are deposited. The publication in which the species is described gives the new species a formal scientific name. Some 1.9 million species have been identified and described, out of some 8.7 million that may actually exist. Millions more have become extinct throughout the existence of life on Earth. Naming process A name of a new species becomes valid (available in zo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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