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1946 In Paleontology
Expeditions, field work, and fossil discoveries Institutions and organizations Natural history museums * The director of the Allied Art Centre, which had taken over the Coste House where the former collections of the defunct Calgary Public Museum were stored, ordered most of the items- including dinosaur fossils- to be incinerated. Scientific organizations Scientific advances Paleoanthropology Paleobotany Evolutionary biology Exopaleontology Extinction research Micropaleontology Invertebrate paleozoology Trace fossils Vertebrate paleozoology Research techniques Fossil trade Law and politics Regulation of fossil collection, transport, or sale Fossil-related crime Official symbols Protected areas Ethics and practice Hoaxes Scandals Unethical practice People Births Awards and recognition Deaths Historiography and anthropology of paleontology Pseudoscience Popular culture Amusement parks and attractions Art Comics Film Gaming Literat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ctenodonta Spjeldnaesi
''Similodonta'' is an extinct genus of early bivalve in the extinct family Praenuculidae. The genus is one of eleven genera in the subfamily Praenuculinae. ''Similodonta'' is known from Ordovician, Middle Ordovician through Silurian, Middle Silurian fossils found in Europe and North America. The genus currently contains eight accepted species, ''Similodonta ceryx'', ''Similodonta collina'', ''Similodonta djupvikensis'', ''Similodonta magna'', ''Similodonta recurva'', ''Similodonta spjeldnaesi'', ''Similodonta wahli'' and the type species ''Similodonta similis''. Description ''Similodonta'' is a small bivalve which was first described in 1964 by Helen Soot-Ryen in an ''Arkiv för Mineralogi och Geologi, Kungliga Svenska Vetenskapsakademien'' paper. Generally the shells of ''Similodonta'' are rounded on the ventral sides of the shell and triangular on the dorsal sides. The triangular shape on the dorsal side is formed by the sharp angle at which the anterior and posterior hinge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Junior Synonym
The Botanical and Zoological Codes of nomenclature treat the concept of synonymy differently. * In botanical nomenclature, a synonym is a scientific name that applies to a taxon that (now) goes by a different scientific name. For example, Linnaeus was the first to give a scientific name (under the currently used system of scientific nomenclature) to the Norway spruce, which he called ''Pinus abies''. This name is no longer in use, so it is now a synonym of the current scientific name, '' Picea abies''. * In zoology, moving a species from one genus to another results in a different binomen, but the name is considered an alternative combination rather than a synonym. The concept of synonymy in zoology is reserved for two names at the same rank that refers to a taxon at that rank - for example, the name ''Papilio prorsa'' Linnaeus, 1758 is a junior synonym of ''Papilio levana'' Linnaeus, 1758, being names for different seasonal forms of the species now referred to as ''Araschnia le ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ashgillian
The Ordovician ( ) is a geologic period and system, the second of six periods of the Paleozoic Era. The Ordovician spans 41.6 million years from the end of the Cambrian Period million years ago (Mya) to the start of the Silurian Period Mya. The Ordovician, named after the Welsh tribe of the Ordovices, was defined by Charles Lapworth in 1879 to resolve a dispute between followers of Adam Sedgwick and Roderick Murchison, who were placing the same rock beds in North Wales in the Cambrian and Silurian systems, respectively. Lapworth recognized that the fossil fauna in the disputed strata were different from those of either the Cambrian or the Silurian systems, and placed them in a system of their own. The Ordovician received international approval in 1960 (forty years after Lapworth's death), when it was adopted as an official period of the Paleozoic Era by the International Geological Congress. Life continued to flourish during the Ordovician as it did in the earlier Cambrian Per ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nucula Magna
''Similodonta'' is an extinct genus of early bivalve in the extinct family Praenuculidae. The genus is one of eleven genera in the subfamily Praenuculinae. ''Similodonta'' is known from Middle Ordovician through Middle Silurian fossils found in Europe and North America. The genus currently contains eight accepted species, ''Similodonta ceryx'', ''Similodonta collina'', ''Similodonta djupvikensis'', ''Similodonta magna'', ''Similodonta recurva'', ''Similodonta spjeldnaesi'', ''Similodonta wahli'' and the type species ''Similodonta similis''. Description ''Similodonta'' is a small bivalve which was first described in 1964 by Helen Soot-Ryen in an ''Arkiv för Mineralogi och Geologi, Kungliga Svenska Vetenskapsakademien'' paper. Generally the shells of ''Similodonta'' are rounded on the ventral sides of the shell and triangular on the dorsal sides. The triangular shape on the dorsal side is formed by the sharp angle at which the anterior and posterior hinge edges meet at the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1940s In Paleontology
Year 194 ( CXCIV) 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 Septimius and Septimius (or, less frequently, year 947 ''Ab urbe condita''). The denomination 194 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 * Emperor Septimius Severus and Decimus Clodius Septimius Albinus Caesar become Roman Consuls. * Battle of Issus: Septimius Severus marches with his army (12 legions) to Cilicia, and defeats Pescennius Niger, Roman governor of Syria. Pescennius retreats to Antioch, and is executed by Severus' troops. * Septimius Severus besieges Byzantium (194–196); the city walls suffer extensive damage. Asia * Battle of Yan Province: Warlords Cao Cao and Lü Bu fight for control over Yan Province; the battle lasts for over 100 d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1946
Events January * January 6 - The first general election ever in Vietnam is held. * January 7 – The Allies recognize the Austrian republic with its 1937 borders, and divide the country into four occupation zones. * January 10 ** The first meeting of the United Nations is held, at Methodist Central Hall Westminster in London. ** ''Project Diana'' bounces radar waves off the Moon, measuring the exact distance between the Earth and the Moon, and proves that communication is possible between Earth and outer space, effectively opening the Space Age. * January 11 - Enver Hoxha declares the People's Republic of Albania, with himself as prime minister. * January 16 – Charles de Gaulle resigns as head of the French provisional government. * January 17 - The United Nations Security Council holds its first session, at Church House, Westminster in London. * January 19 ** The Bell XS-1 is test flown for the first time (unpowered), with Bell's chief test pilot Jack Woolams at the c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
