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Brindabellaspis
''Brindabellaspis stensioi'' ("Erik Stensiö's Brindabella Ranges Shield") is a placoderm with a flat, platypus-like snout from the Early Devonian of the Taemas-Wee Jasper reef in Australia. When it was first discovered in 1980, it was originally regarded as a Weejasperaspidae, Weejasperaspid acanthothoracid due to anatomical similarities with the other species found at the reef. According to Philippe Janvier, anatomical similarities of ''B. stensiois brain and braincase with those of jawless fish, such as the Osteostraci and the Galeaspida, strongly suggest that ''B. stensioi'', and also Antiarchi, the antiarchs, are basal placoderms closest to the ancestral placoderm. References *Gavin Young, Young, Gavin C. 1980, A new Early Devonian placoderm from New South Wales, Australia, with a discussion of placoderm phylogeny: ''Palaeontographica'' 167A pp. 10–76. 2 pl., 27 fig. * Philippe Janvier, Janvier, Philippe. Early Vertebrates Oxford, New York: Oxford University Press, 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Weejasperaspidae
Weejasperaspididae ("Shields of Wee Jasper") is a family of three extinct acanthothoracid placoderms indigenous to the Early Devonian of Victoria and New South Wales, Australia. Description The Weejasperaspids are known from median dorsal plates with distinctive, blade-like crests in the median-posterior portion, and ossified eye capsules. Evolutionary relationships The main reasons why the weejasperaspids are not considered to be closely related to other non-acanthothoracid placoderms, as opposed to the palaeacanthaspids, are that their skull anatomies and plate histologies are generalized, and do not bear any similarities to any specific non-acanthothoracid group, and that the patterns of ornamentation on their dermal plates are unique to this family. The placoderm ''Brindabellaspis stensioi'' was once regarded as a weejasperaspid because of the similarities between its dermal plates to the other weejasperaspids. Even before it was split off into its own order, it stood o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antiarchi
Antiarchi ("opposite anus") is an order (biology), order of heavily armored placoderms. The antiarchs form the second-most successful group of placoderms after the arthrodires in terms of numbers of species and range of environments. The order's name was coined by Edward Drinker Cope, who, when examining some fossils that he thought were armored tunicates related to ''Chelysoma'', mistakenly thought that the orbital fenestra (i.e., the hole in the headshield for the eyes, nose and pineal foramen) was the opening for the mouth, or oral siphon, and that the opening for the anal siphon was on the other side of the body, as opposed to having both oral and anal siphons together at one end. The front portions of their bodies were heavily armored, to the point of literally resembling a box with eyes, with the sometimes scaled, sometimes naked rear portions often becoming wiktionary:sinuous, sinuous, particularly with later forms. The pair of pectoral fins were modified into a pair of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acanthothoracid
Acanthothoraci (''spine chests'') is an extinct group of chimaera-like placoderms who were closely related to the rhenanid placoderms. Superficially, the acanthoracids resembled scaly chimaeras, or (relatively) heavily armored ptyctodonts. They were distinguished from chimaeras by the presence of large scales and plates, a pair of large spines that emanate from their chests (thus, the order's name), tooth-like beak plates, and the typical bone-enhanced placoderm eyeball. They were distinguished from other placoderms due to differences in the anatomy of their skulls, and due to patterns on the skull plates and thoracic plates that are unique to this order. Fossil record Fossils of the Acanthothoracids are found in various deposits from the Lower Devonian throughout the world. Fossils of the Palaeacanthaspids are found in Eurasia and Canada, while the Weejasperaspids have only been found in the Taemas Wee Jasper reef, in Southeastern Australia. Ecology From what can be infer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Early Devonian
The Early Devonian is the first of three Epoch (geology), epochs comprising the Devonian period, corresponding to the Lower Devonian Series (stratigraphy), series. It lasted from and began with the Lochkovian Stage , which was followed by the Pragian from and then by the Emsian, which lasted until the Middle Devonian began, . During this time, the first Ammonoidea, ammonoids appeared, descending from Bactritida, bactritoid Nautiloidea, nautiloids. Ammonoids during this time period were simple and differed little from their nautiloid counterparts. These ammonoids belong to the order Agoniatitida, which in later epochs evolved to new ammonoid orders, for example Goniatite, Goniatitida and Clymeniida. This class of cephalopod molluscs would dominate the marine fauna until the beginning of the Mesozoic Era. References {{Geological history Early Devonian, Geological epochs Devonian geochronology, *01 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Early Devonian Fish
{{disambiguation, geo ...
Early may refer to: History * The beginning or oldest part of a defined historical period, as opposed to middle or late periods, e.g.: ** Early Christianity ** Early modern Europe Places in the United States * Early, Iowa * Early, Texas * Early Branch, a stream in Missouri * Early County, Georgia Other uses * ''Early'' (Scritti Politti album), 2005 * ''Early'' (A Certain Ratio album), 2002 * Early (name) * Early effect, an effect in transistor physics * Early Records, a record label * the early part of the morning See also * Earley (other) Earley is a town in England. Earley may also refer to: * Earley (surname), a list of people with the surname Earley * Earley (given name), a variant of the given name Earlene * Earley Lake, a lake in Minnesota *Earley parser, an algorithm *Earley ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John A
Sir John Alexander Macdonald (January 10 or 11, 1815 – June 6, 1891) was the first prime minister of Canada, serving from 1867 to 1873 and from 1878 to 1891. The dominant figure of Canadian Confederation, he had a political career that spanned almost half a century. Macdonald was born in Scotland; when he was a boy his family immigrated to Kingston in the Province of Upper Canada (today in eastern Ontario). As a lawyer, he was involved in several high-profile cases and quickly became prominent in Kingston, which elected him in 1844 to the legislature of the Province of Canada. By 1857, he had become premier under the colony's unstable political system. In 1864, when no party proved capable of governing for long, Macdonald agreed to a proposal from his political rival, George Brown, that the parties unite in a Great Coalition to seek federation and political reform. Macdonald was the leading figure in the subsequent discussions and conferences, which resulted in the Brit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Philippe Janvier
Philippe Janvier is a French paleontologist, specialising in Palaeozoic vertebrates, who currently works at the Museum National de l’Histoire Naturelle in Paris. He has written several books and scientific papers on Palaeozoic vertebrates and contributed to the Tree of Life phylogeny project. He has led the largest paleontology research group in France (currently called thCR2P, located in Paris. Janvier received the award of the ''Grand prix scientifique de la Fondation Simone et Cino del Duca (Institut de France) Grand may refer to: People with the name * Grand (surname) * Grand L. Bush (born 1955), American actor * Grand Mixer DXT, American turntablist * Grand Puba (born 1966), American rapper Places * Grand, Oklahoma * Grand, Vosges, village and c ...'' on June 11, 2008, for his work. He was a founding member of the Société Française de Systématique. He is currently Associate Editor of the Comptes Rendus Palevol (one of the series of the Comptes rendus de l'Acad ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Palaeontographica
This is a list of academic journals, monographic series, and other serials published by E. Schweizerbart. A B C D E F G H I J K L M N P Q R S T U V W Z {{columns-list, colwidth=30em, *''Zeitschrift der Deutschen Gesellschaft für Geowissenschaften'' *''Zeitschrift für Angewandte Geologie'' *''Zeitschrift für Geomorphologie'' **'' Zeitschrift für Geomorphologie, Supplement Volumes'' **'' Zeitschrift für Geomorphologie, Supplementary Issues'' *''Zentralblatt für Geologie und Paläontologie'' **''Zentralblatt für Geologie und Paläontologie, Teil I'' **''Zentralblatt für Geologie und Paläontologie, Teil II'' *''Ziegler Catalogue of Conodonts'' *''Zoologica'' External linksSerials list@ schweizerbart.de * E. Schweizerbart E. Schweizerbart'sche Verlagsbuchhandlung (Schweizerbart Science Publishers) is a Stuttgart-based scholarly publisher established in 1826 by Wilhelm Emanuel Schweizerbart. The company and its affiliate Bornt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Galeaspida
Galeaspida (from Latin, 'Helmet shields') is an extinct taxon of jawless marine and freshwater fish. The name is derived from ''galea'', the Latin word for ''helmet'', and refers to their massive bone shield on the head. Galeaspida lived in shallow, fresh water and marine environments during the Silurian and Devonian times (430 to 370 million years ago) in what is now Southern China, Tibet and Vietnam. Superficially, their morphology (biology), morphology appears more similar to that of Heterostraci than Osteostraci, there being currently no evidence that the galeaspids had paired fins. A galeaspid ''Tujiaaspis vividus'' from the Silurian period of China was described in 2022 as having a precursor condition to the form of paired fins seen in Osteostraci and gnathostomes. Earlier than this, Galeaspida were already in fact regarded as being more closely related to Osteostraci, based on the closer similarity of the morphology of the braincase. Morphology The defining characterist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gavin Young
Gavin David Young (24 April 1928 – 18 January 2001) was a journalist and travel writer. He was born in Bude, Cornwall, England. His father, Gavin Young, was a lieutenant colonel in the Welsh Guards. Daphne, his mother, was the daughter of Sir Charles Leolin Forestier-Walker, Bt, of Monmouthshire. Young spent most of his youth in Cornwall and South Wales. He graduated from Oxford University, where he studied modern history. Young spent two years with the Ralli Brothers shipping company in Basra in Iraq before living with the Marsh Arabs of southern Iraq between the Tigris and Euphrates rivers. He fashioned his experiences into a book, ''Return to the Marshes'' (1977). In 1960, from Tunis, he joined ''The Observer'' of London as a foreign correspondent, and was the ''Observer'''s correspondent in Paris and New York. He had covered fifteen wars and revolutions throughout the world, and worked for ''The Guardian'' and was a travel writer. Young died in London on 18 January 2001; ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Erik Stensiö
Prof Erik Helge Osvald Stensiö HFRSE (2 October 1891 – 11 January 1984) was a Sweden, Swedish paleozoology, paleozoologist. He later took his new surname from his place of origin and is occasionally referred to with both names (as Erik Andersson Stensiö, Erik A. Stensiö or Erik A:son Stensiö) Life Erik Helge Oswald Andersson, as his original name was, was born in the village of Stensjö by in Döderhult parish in Kalmar County, the son of Johan Fredrik Andersson (d.1907), a farmer, and his wife, Otilia Maria Erlandson (d.1940). He was educated at Linköping Gymnasium. He then studied science at the University of Uppsala, graduating BSc in 1912. He received his Ph.D. and a docentship in paleontology from Uppsala University in 1921 and became professor and keeper at the Zoopaleontological (later called the Paleozoological) department of the Swedish Museum of Natural History in Stockholm in 1923, a position he held until his retirement in 1959. Stensiö specialized in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
