parent_taxon dysganus
Montana is a state in the Western region of the United States . The state ' s name is derived from the Spanish word ( mountain ). Montana has several nicknames , although none official , including " Big Sky Country " and " The Treasure State ", and slogans that include " Land of the Shining Mountains " and more recently " The Last Best Place ". Montana has a border with three Canadian provinces : British Columbia , Alberta , and Saskatchewan , the only state to do so . It also borders North Dakota and South Dakota to the east , Wyoming to the south , and Idaho to the west and southwest . Montana is ranked 4th in size , but 44th in population and 48th in population density of the 50 United States . The western third of Montana contains numerous mountain ranges . Smaller island ranges are found throughout the state . In total , 77 named ranges are part of the Rocky Mountains . The eastern half of Montana is characterized by western prairie terrain and badlands . The Triassic is a geologic period and system which spans 50 . 9 million years from the end of the Permian Period million years ago ( ___MASK67___ ), to the beginning of the Jurassic Period ___MASK67___ . The Triassic is the first period of the Mesozoic Era . Both the start and end of the period are marked by major extinction events . The Triassic was named in 1834 by Friedrich von Alberti , after the three distinct rock layers (" tri " meaning " three ") that are found throughout Germany and northwestern Europe  red beds , capped by marine limestone , followed by a series of terrestrial mud - and sandstones  called the " Trias ". The Paleogene ( or ; also spelled Palaeogene or Palæogene ; informally Lower Tertiary ) is a geologic period and system that spans 43 million years from the end of the Cretaceous Period million years ago ( ___MASK67___ ) to the beginning of the Neogene Period ___MASK67___ . It is the beginning of the Cenozoic Era of the present Phanerozoic Eon . The Paleogene is most notable for being the time during which mammals diversified from relatively small , simple forms into a large group of diverse animals in the wake of the Cretaceous  Paleogene extinction event that ended the preceding Cretaceous Period . Dysganus is the name given to a dubious genus of ___MASK64___ from the Late Cretaceous . It was a ceratopsian . Its fossils have been found in Montana . Idaho is a state in the northwestern region of the United States . It borders the state of Montana to the east and northeast , Wyoming to the east , Nevada and Utah to the south , and Washington and Oregon to the west . To the north , it shares a small portion of the Canadian border with the province of British Columbia . With a population of around 1 . 7 million people and an ___MASK62___ of , Idaho is the 14th largest and 39th most populous of the 50 states . The state ' s capital and largest city is Boise . Ceratopsia or Ceratopia ( or ; Greek : " horned faces ") is a group of herbivorous , beaked dinosaurs that thrived in what are now North America , Europe , and Asia , during the Cretaceous Period , although ancestral forms lived earlier , in the Jurassic . The earliest known ceratopsian , " Yinlong downsi ", lived between 161 . 2 and 155 . 7 million years ago . The last ceratopsian species , " Triceratops prorsus ", became extinct during the Cretaceous  Paleogene extinction event , . Prairies are ecosystems considered part of the temperate grasslands , savannas , and shrublands biome by ecologists , based on similar temperate climates , moderate rainfall , and a composition of grasses , herbs , and shrubs , rather than trees , as the dominant vegetation type . Temperate grassland regions include the Pampas of ___MASK75___ , southern Brazil and Uruguay as well as the steppes of Eurasia . Lands typically referred to as " prairie " tend to be in North America . The term encompasses the ___MASK62___ referred to as the Interior Lowlands of Canada , the United States , and Mexico , which includes all of the Great Plains as well as the wetter , somewhat hillier land to the east . In the U . S ., the ___MASK62___ is constituted by most or all of the states of North Dakota , South Dakota , Nebraska , Kansas , and Oklahoma , and sizable parts of the states of Montana , Wyoming , Colorado , New Mexico , Texas , Missouri , Iowa , Illinois , Ohio , Indiana , Wisconsin , and western and southern Minnesota . The Central Valley of California is also a prairie . The Canadian Prairies occupy vast areas of Manitoba , Saskatchewan , and Alberta . Ceratops ( meaning " horn face ") is a dubious genus of herbivorous ceratopsian ___MASK64___ which lived during the Late Cretaceous . Its fossils have been found in Montana . Although poorly known , " Ceratops " is important in the history of dinosaurs , since it is the type genus for which both the Ceratopsia and the ___MASK91___ have been named . The material is too poor to be confidently referred to better specimens , and " Ceratops " is thus considered a " nomen dubium ". The Jurassic ( from Jura Mountains ) is a geologic period and system that spans 56 . 3 million years from the end of the Triassic Period million years ago ( ___MASK67___ ) to the beginning of the Cretaceous Period ___MASK67___ . The Jurassic constitutes the middle period of the Mesozoic Era , also known as the Age of Reptiles . The start of the period is marked by the major Triassic  Jurassic extinction event . Two other extinction events occurred during the period : the Pliensbachian / Toarcian event in the Early Jurassic , and the Tithonian event at the end ; however , neither event ranks among the " Big Five " mass extinctions . In biology , an organism is any contiguous living system , such as an ___MASK11___ , plant , fungus , archaeon , or bacterium . All known types of organisms are capable of some degree of response to stimuli , reproduction , growth and development and homeostasis . An organism consists of one or more cells ; when it has one cell it is known as a unicellular organism ; and when it has more than one it is known as a multicellular organism . Most unicellular organisms are of microscopic scale and are thus loosely described as microorganisms . Humans are multicellular organisms composed of many trillions of cells grouped into specialized tissues and organs . Binomial nomenclature ( also called binominal nomenclature or binary nomenclature ) is a formal system of naming species of living things by giving each a name composed of two parts , both of which use Latin grammatical forms , although they can be based on words from other languages . Such a name is called a binomial name ( which may be shortened to just " binomial "), a binomen or a scientific name ; more informally it is also called a Latin name . The first part of the name identifies the genus to which the species belongs ; the second part identifies the species within the genus . For example , humans belong to the genus " ___MASK47___ " and within this genus to the species " ___MASK47___ sapiens ". The " formal " introduction of this system of naming species is credited to Carl Linnaeus , effectively beginning with his work " Species Plantarum " in 1753 . But Gaspard Bauhin , in as early as 1623 , had introduced in his book " Pinax theatri botanici " ( English , " Illustrated exposition of plants ") many names of genera that were later adopted by Linnaeus . Alberta is a western province of Canada . With an estimated population of 4 , 196 , 457 as of July 1 , 2015 , it is Canada ' s fourth - most populous province and the most populous of Canada ' s three prairie provinces . Its ___MASK62___ is about . Alberta and its neighbour Saskatchewan were districts of the Northwest Territories until they were established as provinces on September 1 , 1905 . The premier has been Rachel Notley since May 2015 . A genus ( genera ) is a taxonomic rank used in the biological classification of living and fossil organisms in biology . In the hierarchy of biological classification , genus comes above species and below family . In binomial nomenclature , the genus name forms the first part of the binomial species name for each species within the genus . The Cretaceous is a geologic period and system that spans 79 million years from the end of the Jurassic Period million years ago ( ___MASK67___ ) to the beginning of the Paleogene Period ___MASK67___ . It is the last period of the Mesozoic Era . The Cretaceous Period is usually abbreviated K , for its German translation " Kreide " ( chalk ). Dinosaurs are a diverse group of animals of the clade Dinosauria that first appeared during the Triassic . Although the exact origin and timing of the evolution of dinosaurs is the subject of active research , the current scientific consensus places their origin between 231 and 243 million years ago . They became the dominant terrestrial vertebrates after the Triassic  Jurassic extinction event 201 million years ago . Their dominance continued through the Jurassic and Cretaceous periods and ended when the Cretaceous  Paleogene extinction event led to the extinction of most ___MASK64___ groups 66 million years ago . The Triassic  Jurassic extinction event marks the boundary between the Triassic and Jurassic periods , , and is one of the major extinction events of the Phanerozoic eon , profoundly affecting life on land and in the oceans . In the seas , a whole class ( conodonts ) and 34 % of marine genera disappeared . On land , all pseudosuchians ( non - ornithodiran archosaurs ) other than crocodylomorphs ( ___MASK9___ and ___MASK99___ ), some remaining therapsids , and many of the large amphibians became extinct . Wyoming is a state in the mountain region of the western United States . The state is the tenth largest by ___MASK62___ , the least populous and the second least densely populated state in the country . Wyoming is bordered on the north by Montana , on the east by South Dakota and Nebraska , on the south by Colorado , on the southwest by Utah , and on the west by Idaho . Cheyenne is the capital and the most populous city in Wyoming , with a population estimate of 63 , 335 in 2015 . The state population was estimated at 586 , 107 in 2015 , which is less than the population of 31 of the largest U . S . cities . Saskatchewan ( or ) is a prairie and boreal province in west - central Canada , the only province without natural borders . It has an ___MASK62___ of , nearly 10 percent of which is fresh water , composed mostly of rivers , reservoirs , and the province ' s 100 , 000 lakes .