HadrosauridaeExtinct family of dinosaursHadrosauridae (from Ancient Greek ἁδρός (hadrós) 'stout, thick' and σαύρα (saúra) 'lizard'), is a family of ornithischiandinosaurs informally referred to as duck-billed dinosaurs. This group is known as the duck-billed dinosaurs for the flat duck-bill appearance of the bones in their snouts.
Species descriptionA species description is a formal scientific description of a newly encountered species, typically articulated through a scientific publication. Its purpose is to provide a clear description of a new species of organism and explain how it differs from species that have been previously described or related species. For a species to be considered valid, a species description must follow established guidelines and naming conventions dictated by relevant nomenclature codes.
ToothA tooth (pl.: teeth) is a hard, calcified structure found in the jaws (or mouths) of many vertebrates and used to break downfood. Some animals, particularly carnivores and omnivores, also use teeth to help with capturing or wounding prey, tearing food, for defensive purposes, to intimidate other animals often including their own, or to carry prey or their young. The roots of teeth are covered by gums.
SpeciesBasic unit of taxonomic classification, below genusThe hierarchy of biological classification's eight major taxonomic ranks. A genus contains one or more species. Minor intermediate ranks are not shown.A species (pl. species) is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity.
DinosaurClade of reptilesBirds are avian dinosaurs, and phylogenetictaxonomy includes over 11,000 extant species in the group Dinosauria.Dinosaurs are a diverse group of warmblooded reptiles of the cladeDinosauria. They existed through most of the Mesozoicera, first appearing early in the Triassicperiod.
CeratopsiaCeratopsia or Ceratopia ( or ; Greek: "horned faces") is a group of herbivorous, beaked dinosaurs that thrived in what are now North America, Asia and Europe, during the CretaceousPeriod, although ancestral forms lived earlier, in the Late Jurassic of Asia. The earliest known ceratopsian, Yinlong downsi, lived between 161.2 and 155.7 million years ago.
Western United StatesOne of the four census regions of the USRegion in the United StatesThe Western United States (also called the American West, the Western States, the Far West, the Western territories, and the West) is one of the four census regionsdefined by the United States Census Bureau.As American settlement in the U.S. expanded westward, the meaning of the term the West changed. Before around 1800, the crest of the Appalachian Mountains was seen as the western frontier.
Ferdinand Vandeveer HaydenFerdinand Vandeveer Hayden (September 7, 1829 – December 22, 1887) was an American geologist noted for his pioneering surveying expeditions of the Rocky Mountains in the late 19th century. He was also a physician who served with the Union Army during the Civil War. Early lifeFerdinand Hayden was born in Westfield, Massachusetts. As a young boy he was fascinated with all nature and wildlife, which led him into the field of medicine.
Joseph LeidyJoseph Mellick Leidy (September 9, 1823 – April 30, 1891) was an American paleontologist, parasitologist, and anatomist. Leidy was professor of anatomy at the University of Pennsylvania, later becoming a professor of natural history at Swarthmore College and the director of scientific and educational programs at the Wagner Free Institute of Science.GenusGenus (; pl.: genera) is a taxonomic rank above species and below family as used in the biological classification of living and fossil organisms as well as viruses. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus. E.g. Panthera leo (lion) and Panthera onca (jaguar) are two species within the genus Panthera.
Monotypic taxonIn biology, for ranks such as genus or family, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate extant taxon. In the case of genera, the term "unispecific" or "monospecific" is sometimes preferred. In botanical nomenclature, a monotypic genus is a genus in the special case in which a genus and a single extant species are simultaneously described.
MontanaU.S. stateState in the United StatesMontana ( ) is a landlocked state in the Mountain West subregion of the Western United States. It is bordered by Idaho to the west, North Dakota to the east, South Dakota to the southeast, Wyoming to the south, and the Canadian provinces of Alberta, British Columbia, and Saskatchewan to the north. It is the fourth-largest state by area, but the eighth-least populous state and the third-least densely populated state.
Nomen dubiumIn binomial nomenclature, a nomen dubium (Latin for "doubtful name", plural nomina dubia) is a scientific name that is of unknown or doubtful application. ZoologyIn case of a nomen dubium, it may be impossible to determine whether a specimen belongs to that group or not. This may happen if the original type series (i.e. holotype, isotype, syntype or paratype) is lost or destroyed.*As an Amazon Associate I earn from qualifying purchases.