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Annulatubus
''Annulatubus'' is a genus of the Ediacaran Biota (635 – 542 Ma) found in Northwest Canada, and Northern Siberia. It has been found in both shallow water and deep-water assemblages no older than 560 Ma placing it within the youngest Ediacaran. The only known species within the genus is ''Annulatubus flexuosus''. Discovery and naming Fossils of ''Annulatubus'' were discovered in the Blueflower Formation from the Mackenzie Mountains of Northwest Canada, and described in 2015. The generic name ''Annulatubus'' derives from the Latin words 'annulatus', to mean 'ringed'; and 'tubus', to mean 'tube', due to the morphology of the fossils. The specific name derives from the Latin word 'flexuosus', to mean 'flexiable', again owning to the appearance of the fossils. Description ''Annulatubus flexuosus'' is a long tube-like structure with uniformly spaced ridges, with some growing up to lengths between , and widths between . This makes it significantly larger than most other tube-l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blueflower Formation
The Blueflower Formation is a geologic formation in the Northwest Territories, and is a part of the Rackla Group. It preserves fossils dating back to the Ediacaran period. Paleobiota Unlike most other Ediacaran formations, the Blueflower Formation is unique in that is preserves shallow and deep-marine environments, and as it correlates with other Avalonian formations such as those in Newfoundland and Labrador, it allowed scientists to figure out whether the Ediacaran Biota started out in deep-marine environments before making their way into shallower waters. The forms that can be found across the formation are the familiar Petalonamae such as Charniodiscus, including juvenile petalonamids from the Lower Member, and from the Upper Member tubular forms such as Annulatubus, and the enigmatic Windermeria. Proarticulata Petalonamae Cnidarian ''incertae sedis'' Flora Ichnogenera Undescribed See also * List of fossiliferous stratigraphic units ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Annulitubus
''Annulitubus'' is an extinct genus of annelid from the Middle Devonian of Brazil. It has been found in both the Ponta Grossa Formation and the Pimenteira Formation of South and Northeastern Brazil respectively. In life, it would probably have been an sedentary tube-dwelling polychaete, partially buried in substrate and subsisting by suspension-feeding. Etymology The name ''Annulitubus'' derives from the Latin words 'annulus', meaning ring, and 'tubus', meaning tube. The type species, ''A. mutveii'', is named in honour of Harry Mutvei for his work on the skeletal anatomy of various taxa, while ''A. fernandesi'' is named after Antonio Carlos Sequeira Fernandes, a paleontologist from the Museu Nacional, for his works on Brazilian paleoinvertebrates. Description Fossils of ''Annulitubus'' are found in together, preserved great numbers upwards of 170 individuals/meter². There are found preserved either in a horizontal pose, parallel to the bed forming pavements, or more ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Ediacaran Genera
The existence of life, especially that of animals, before the Cambrian had long been the subject of debate in paleontology. The apparent suddenness of the Cambrian explosion had no firm explanation, and Charles Darwin himself recognized the challenge it posed for his theory of evolution. While reports of Precambrian organisms have been made since Alexander Murray's 1868 discovery of ''Aspidella'', it wasn't until the discovery of ''Charnia'' in 1956 that considerable evidence of Precambrian life had been presented. The period immediately preceding the Cambrian, the Ediacaran, is now widely accepted of containing animal life. It spans from 635 to 540 million years ago, and covers approximately 2% of Earth's history. Taxonomists have purported a total of 245 described genera from the Ediacaran, 162 of which are accepted as valid. Key * Valid genus - Genera that are accepted by the scientific community * Synonym (taxonomy), Junior synonym - Alternative name for an already existi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Devonian
The Devonian ( ) is a period (geology), geologic period and system (stratigraphy), system of the Paleozoic era (geology), era during the Phanerozoic eon (geology), eon, spanning 60.3 million years from the end of the preceding Silurian period at million years ago (Megaannum, Ma), to the beginning of the succeeding Carboniferous period at Ma. It is the fourth period of both the Paleozoic and the Phanerozoic. It is named after Devon, South West England, where rocks from this period were first studied. The first significant evolutionary radiation of history of life#Colonization of land, life on land occurred during the Devonian, as free-spore, sporing land plants (pteridophytes) began to spread across dry land, forming extensive coal forests which covered the continents. By the middle of the Devonian, several groups of vascular plants had evolved leaf, leaves and true roots, and by the end of the period the first seed-bearing plants (Pteridospermatophyta, pteridospermatophyt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ediacaran
The Ediacaran ( ) is a geological period of the Neoproterozoic geologic era, Era that spans 96 million years from the end of the Cryogenian Period at 635 Million years ago, Mya to the beginning of the Cambrian Period at 538.8 Mya. It is the last period of the Proterozoic geologic eon, Eon as well as the last of the so-called "Precambrian supereon", before the beginning of the subsequent Cambrian Period marks the start of the Phanerozoic Eon, where recognizable fossil evidence of life becomes common. The Ediacaran Period is named after the Ediacara Hills of South Australia, where trace fossils of a diverse community of previously unrecognized lifeforms (later named the Ediacaran biota) were first discovered by geologist Reg Sprigg in 1946. Its status as an official geological period was ratified in 2004 by the International Union of Geological Sciences (IUGS), making it the first new geological period declared in 120 years. Although the period took namesake from the Ediacara Hills ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ediacaran Biota
The Ediacaran (; formerly Vendian) biota is a taxonomic period classification that consists of all life forms that were present on Earth during the Ediacaran Period (). These were enigmatic tubular and frond-shaped, mostly sessile, organisms. Trace fossils of these organisms have been found worldwide, and represent the earliest known complex multicellular organisms. The term "Ediacara biota" has received criticism from some scientists due to its alleged inconsistency, arbitrary exclusion of certain fossils, and inability to be precisely defined. The Ediacaran biota may have undergone evolutionary radiation in a proposed event called the Avalon explosion, . This was after the Earth had thawed from the Cryogenian period's extensive glaciation. This biota largely disappeared with the rapid increase in biodiversity known as the Cambrian explosion. Most of the currently existing body plans of animals first appeared in the fossil record of the Cambrian rather than the Ediacara ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canada
Canada is a country in North America. Its Provinces and territories of Canada, ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, making it the world's List of countries and dependencies by area, second-largest country by total area, with the List of countries by length of coastline, world's longest coastline. Its Canada–United States border, border with the United States is the world's longest international land border. The country is characterized by a wide range of both Temperature in Canada, meteorologic and Geography of Canada, geological regions. With Population of Canada, a population of over 41million people, it has widely varying population densities, with the majority residing in List of the largest population centres in Canada, urban areas and large areas of the country being sparsely populated. Canada's capital is Ottawa and List of census metropolitan areas and agglomerations in Canada, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Siberia
Siberia ( ; , ) is an extensive geographical region comprising all of North Asia, from the Ural Mountains in the west to the Pacific Ocean in the east. It has formed a part of the sovereign territory of Russia and its predecessor states since the lengthy conquest of Siberia, which began with the fall of the Khanate of Sibir in 1582 and concluded with the annexation of Chukotka in 1778. Siberia is vast and sparsely populated, covering an area of over , but home to roughly a quarter of Russia's population. Novosibirsk, Krasnoyarsk, and Omsk are the largest cities in the area. Because Siberia is a geographic and historic concept and not a political entity, there is no single precise definition of its territorial borders. Traditionally, Siberia spans the entire expanse of land from the Ural Mountains to the Pacific Ocean, with the Ural River usually forming the southernmost portion of its western boundary, and includes most of the drainage basin of the Arctic Ocean. I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mackenzie Mountains
The Mackenzie Mountains are a Canadian mountain range forming part of the Yukon–Northwest Territories boundary between the Liard and Peel rivers. The range is named in honour of Canada's second prime minister, Alexander Mackenzie. Nahanni National Park Reserve and Nááts'ihch'oh National Park Reserve are in the Mackenzie Mountains. The mining town of Tungsten Tungsten (also called wolfram) is a chemical element; it has symbol W and atomic number 74. It is a metal found naturally on Earth almost exclusively in compounds with other elements. It was identified as a distinct element in 1781 and first ..., site of the Cantung Mine, is in the Mackenzie Mountains. Only two roads lead into the Mackenzie Mountains, both in Yukon: the Nahanni Range Road leading to the townsite of Tungsten and the Canol Road leading to the Macmillan Pass. The highest mountain in this range is Keele Peak at , in Yukon. The second-highest mountain is Mount Nirvana. It is, at , the highe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Latin
Latin ( or ) is a classical language belonging to the Italic languages, Italic branch of the Indo-European languages. Latin was originally spoken by the Latins (Italic tribe), Latins in Latium (now known as Lazio), the lower Tiber area around Rome, Italy. Through the expansion of the Roman Republic, it became the dominant language in the Italian Peninsula and subsequently throughout the Roman Empire. It has greatly influenced many languages, Latin influence in English, including English, having contributed List of Latin words with English derivatives, many words to the English lexicon, particularly after the Christianity in Anglo-Saxon England, Christianization of the Anglo-Saxons and the Norman Conquest. Latin Root (linguistics), roots appear frequently in the technical vocabulary used by fields such as theology, List of Latin and Greek words commonly used in systematic names, the sciences, List of medical roots, suffixes and prefixes, medicine, and List of Latin legal terms ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sekwitubulus
''Sekwitubulus annulatus'' is an Ediacaran tubular fossil from the Blueflower Formation in Canada. ''Sekwitubulus'' is a monotypic genus, containing only the single species. ''S. annulatus'' is possibly a type of annelid worm. Discovery and naming ''Sekwitubulus'' was found at Sekwi Brook, Blueflower Formation in the Mackenzie Mountains of Northwestern Canada and formally described in 2015. The generic name ''Sekwitubulus'' derives from the place name of Sekwi Brook, where the first specimens were found, and the Latin word ''tubulus'', to mean "small tube". The specific name ''annulatus'' is after the Latin word for "rigged/annular ornamentation". Description ''Sekwitubulus annulatus'' consists of straight and rigid tubes, with the largest known coming in at in height and in width. The tube walls are thin, with annular ridges spaced along the length of the tube at intervals on the outside, with a smooth interior. The holotype specimen is noted to have a tentaculate di ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
