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Prioniodus
''Prioniodus'' is an extinct genus of conodonts in the family Balognathidae from the Ordovician.On Pander's Ordovician conodonts: distribution and significance of the Prioniodus elegans fauna in Baltoscandia. SM Bergström, Senckenbergiana lethaea, 1988The Conodont Genus Prioniodus and Related Forms. F. H. T. Rhodes and Klaus J. Müller, Journal of Paleontology, Vol. 30, No. 3 (May, 1956), pages 695-699Stable URL ''Prioniodus elegans'' is from the Ordovician of Baltoscandia Baltoscandian Confederation or Baltoscandia is a geopolitical concept of a Baltic–Scandinavian ( Nordic) union comprising Denmark, Estonia, Finland, Iceland, Latvia, Lithuania, Norway, and Sweden. The idea was proposed by a Swedish Professor .... References External links * * Prioniodontida genera Ordovician conodonts Paleozoic life of the Northwest Territories {{conodont-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Balognathidae
Balognathidae is an extinct conodont family. Genera Genera are: * †'' Amorphognathus'' * †'' Baltoniodus'' * †'' Birksfeldia'' * †'' Icriodella'' * †'' Notiodella'' * †'' Polyplacognathus'' * †'' Prioniodus'' * †''Promissum'' * †''Pterospathodus'' References External links Balognatidaeat fossilworks Fossilworks is a portal which provides query, download, and analysis tools to facilitate access to the Paleobiology Database The Paleobiology Database is an online resource for information on the distribution and classification of fossil animals ....org (retrieved 8 May 2016) Conodont families Prioniodontida {{conodont-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1856 In Paleontology
Insects Vertebrates Conodonts Archosauromorphs Newly named phytosaurs Newly named pseudosuchians Newly named dinosaurs References {{reflist, 30em 1850s in paleontology Paleontology, 1856 In ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heinz Christian Pander
Heinz Christian Pander, also Christian Heinrich Pander ( – ), was a Russian Empire ethnic Baltic German biologist and embryologist. Biography In 1817 he received his doctorate from the University of Würzburg, and spent several years (1827–1842), performing scientific research from his estate in Carnikava (german: Zarnikau) on the banks of the Gauja River near Riga. In 1820 he took part in a scientific expedition to Bokhara as a naturalist. In 1826 he became a member of the Saint Petersburg Academy of Sciences. Research Pander studied the chick embryo and discovered the germ layers (i.e., three distinct regions of the embryo that give rise to the specific organ system). Because of these findings, he is considered by many to be the "founder of embryology". His work in embryology was continued by Karl Ernst von Baer (1792-1876), who expanded Pander's concept of germ layers to include all vertebrates. Pander performed important studies in the field of paleontology, being k ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Conodont
Conodonts (Greek ''kōnos'', "cone", + ''odont'', "tooth") are an extinct group of agnathan (jawless) vertebrates resembling eels, classified in the class Conodonta. For many years, they were known only from their tooth-like oral elements, which are usually found in isolation and are now called conodont elements. Knowledge about soft tissues remains limited. They existed in the world's oceans for over 300 million years, from the Cambrian to the beginning of the Jurassic. Conodont elements are widely used as index fossils, fossils used to define and identify geological periods. The animals are also called Conodontophora (conodont bearers) to avoid ambiguity. Discovery and understanding of conodonts The teeth-like fossils of the conodont were first discovered by Heinz Christian Pander and the results published in Saint Petersburg, Russia, in 1856. The name ''pander'' is commonly used in scientific names of conodonts. It was only in the early 1980s that the first fossil evidence of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baltoscandia
Baltoscandian Confederation or Baltoscandia is a geopolitical concept of a Baltic–Scandinavian ( Nordic) union comprising Denmark, Estonia, Finland, Iceland, Latvia, Lithuania, Norway, and Sweden. The idea was proposed by a Swedish Professor Sten de Geer (1886–1933) in the journal ''Geografiska Annaler'' in 1928 and further developed by Professor Kazys Pakštas (1893–1960), a Lithuanian scientist in the field of geography and geopolitics. Development of the concept Pakštas states in his book ''The Baltoscandian Confederation'' that the term Baltoscandia was first used by Sten de Geer in an article in "Geografiska Annaler" in 1928. In this book Baltoscandia is described in several different dimensions: as a geographical and cultural, as an economic and as a political and military unit. Kazys Pakštas proposed that one of the ways for the small nations to withstand the influence coming from the large ones is to unite and to cooperate more closely among each other. As ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prioniodontida Genera
Prioniodontida, also known as the "complex conodonts", is a large clade of conodonts that includes two major evolutionary grades; the Prioniodinina and the Ozarkodinina. It includes many of the more famous conodonts, such as the giant ordovician ''Promissum ''Promissum'' is an extinct genus of conodonts, primitive chordates, that lived during the Upper Ordovician period. A conodont, ''Promissum'' had a primitive mouth under its eyes with mineralized teeth, which are both typical for conodonts. It h ...'' (Prioniodinina) from the Soom Shale and the Carboniferous specimens from the Granton Shrimp bed (Ozarkodinina). They are euconodonts, in that their elements are composed of two layers; the crown and the basal body, and are assumed to be a clade. Phylogeny This is a recent cladogram of the Prioniodontida, simplified from Donoghue ''et al.'', (2008). Notes References {{Taxonbar, from=Q6581502 Vertebrate unranked clades ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ordovician Conodonts
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 Cambr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
