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Allosaur
''Allosaurus'' ( ) is an extinct genus of theropoda, theropod dinosaur that lived 155 to 145 million years ago during the Late Jurassic Geologic time scale, period (Kimmeridgian to late Tithonian Geologic time scale, ages). The first fossil remains that could definitively be ascribed to this genus were described in 1877 in paleontology, 1877 by Othniel Charles Marsh, Othniel C. Marsh. The name "''Allosaurus''" means "different lizard", alluding to its lightweight , which Marsh believed were unique. The genus has a very complicated Taxonomy (biology), taxonomy and includes at least three valid species, the best known of which is ''A. fragilis''. The bulk of ''Allosaurus'' remains come from North America's Morrison Formation, with material also known from the Alcobaça Formation and Lourinhã Formation in Portugal. It was known for over half of the 20th century as ''Antrodemus'', but a study of the abundant remains from the Cleveland-Lloyd Dinosaur Quarry returned the name "''Al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theropoda
Theropoda (; from ancient Greek [wiktionary:θηρίον, , (''therion'') "wild beast"; wiktionary:πούς, , wiktionary:ποδός, (''pous, podos'') "foot"]) is one of the three major groups (Clade, clades) of Dinosaur, dinosaurs, alongside Ornithischia and Sauropodomorpha. Theropods, both extant and extinct, are characterized by hollow bones and three toes and claws on each limb. They are generally classed as a group of saurischian dinosaurs, placing them closer to sauropodomorphs than to ornithischians. They were ancestrally carnivorous, although a number of theropod groups evolved to become herbivores and omnivores. Members of the subgroup Coelurosauria and possibly some other or all theropods were covered in Feather, feathers. In the Jurassic, birds evolved from small specialized coelurosaurian theropods, and are currently represented by about 11,000 living species, making theropods the only group of dinosaurs alive today. Theropods first appeared during the Ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antrodemus
''Antrodemus'' ("chamber bodied") is a dubious genus of theropod dinosaur from the Upper Jurassic, probably the Morrison Formation, of Middle Park, Colorado. It contains one species, ''Antrodemus valens'', first described and named as a species of '' Poekilopleuron'' by Joseph Leidy in 1870. Discovery and species The first described fossil specimen was a bone obtained secondhand by Ferdinand Vandeveer Hayden in 1869 (original discoverer unknown). It came from Middle Park, near Granby, Colorado, probably from Morrison Formation rocks. Hayden reported that several similar fossils had been identified as petrified horse hooves. Hayden sent his specimen to Joseph Leidy, who identified it as half of a tail vertebra, and tentatively assigned it to the European dinosaur genus '' Poekilopleuron'' as ''Poicilopleuron'' ic''valens'', based on the shared presence of a large medullary cavity. He identified the presence of trabeculae in ''P''. ''valens'' as a distinguishing character from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lourinhã Formation
The Lourinhã Formation () is a fossil-rich geological formation in western Portugal, named for the municipality of Lourinhã. The formation is mostly Late Jurassic in age (Kimmeridgian/Tithonian), with the top of the formation extending into the earliest Cretaceous (Berriasian). It is notable for containing a fauna especially similar to that of the Morrison Formation in the United States and a lesser extent to the Tendaguru Formation in Tanzania. There are also similarities to the nearby Villar del Arzobispo Formation and Alcobaça Formation. Besides the fossil bones, Lourinhã Formation is well known for the fossil tracks and fossilized dinosaur eggs. The Lourinhã Formation includes several lithostratigraphic units, such as Praia da Amoreira-Porto Novo Members, Praia Azul Member, the Santa Rita Member, and the Assenta Member. The stratigraphy of the formation is complex and controversial, with the constituent member beds belonging to the formation varying between different autho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2020 In Archosaur Paleontology
This article records new taxa of fossil archosaurs of every kind binomial nomenclature, described during the year 2020, as well as other significant discoveries and events related to paleontology of archosaurs that occurred in 2020. Pseudosuchians New pseudosuchian taxa Pseudosuchian research * A study on the skeletal anatomy and bone histology of ''Gracilisuchus stipanicicorum'', based on data from two new specimens, is published by Lecuona, Desojo & Cerda (2020). * Redescription of the anatomy of the postcranial skeleton of ''Riojasuchus tenuisceps'', and a study on the phylogenetic affinities of Ornithosuchidae, ornithosuchids, is published by von Baczko, Desojo & Ponce (2020). * Description of a new Erpetosuchidae, erpetosuchid specimen from the Upper Triassic Lossiemouth Sandstone (Scotland, United Kingdom) and a review of the anatomy, taxonomy and systematics of other erpetosuchid specimens from the Lossiemouth Sandstone (all previously referred to ''Erpetosuchus'') is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cleveland-Lloyd Dinosaur Quarry
Jurassic National Monument, at the site of the Cleveland-Lloyd Dinosaur Quarry, well known for containing the densest concentration of Jurassic dinosaur fossils ever found, is a paleontological site located near Cleveland, Utah, in the San Rafael Swell, a part of the Stratum, geological layers known as the Morrison Formation. Well over 15,000 bones have been excavated from this Jurassic excavation site and there are many thousands more awaiting excavation and study. It was designated a National Natural Landmark in October 1965. The John D. Dingell, Jr. Conservation, Management, and Recreation Act, signed into law by President Donald Trump on March 12, 2019, named it as a List of national monuments of the United States, national monument. All of these bones, belonging to different species, are found disarticulated and indistinctly mixed together. It was hypothesized by Peter Dodson in 1980 that this strong concentration of mixed fossilized bones was due to a "predator trap", ho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1878 In Paleontology
Arthropods Newly named arachnids Newly named insects Archosauromorphs O. W. Lucas recovers more material which would be referred to ''Laelaps trihedrodon'' from Morrison Formation strata near Garden Park, Colorado."Introduction," Chure (2001) page 11. Newly named pseudosuchians Newly named dinosaurs Plesiosaurs Newly named plesiosaurs Synapsids Non-mammalian Footnotes References * {{cite book , last=Chure , first=Daniel J. , year=2001 , chapter=On the type and referred material of ''Laelaps trihedrodon'' Cope 1877 (Dinosauria: Theropoda) , editor=Tanke, Darren , editor2=Carpenter, Kenneth , title=Mesozoic Vertebrate Life , publisher=Indiana University Press , location=Bloomington and Indianapolis , page10–18 , isbn=0-253-33907-3 , url=https://archive.org/details/mesozoicvertebra0000unse/page/10 1870s in paleontology 1878 in science, Paleontology, 1878 In ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1877 In Paleontology
Arthropods Newly named crustaceans Newly named insects Fish Non-dinosaurian reptiles Dinosaurs ''Laelaps trihedrodon'', Cope criticizes ''Dryptosaurus'' O. W. Lucas collected the first remains of what would later in the year be named ''Laelaps trihedrodon'' from Quarry I of the Saurian Hill at Garden Park, Colorado."Introduction," Chure (2001) page 11. Edward Drinker Cope would describe the material later in the year in a short paper titled "On a carnivorous dinosaurian from the Dakota beds of Colorado."Cope (1887) pages 805-806. The "Dakota beds" he references are actually Morrison Formation strata. Cope claims to have a skeleton of unspecified completeness on which to establish the new species, but only describes a partial dentary which has 5 successional teeth, 2 functional teeth, and one tooth missing from its socket. All of the preceding material has since been lost to science with the exception of 5 broken, partial tooth crowns."Description of 5780," Chure (2001) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Octávio Mateus
Octávio Mateus (born 1975) is a Portugal, Portuguese dinosaur paleontologist and biologist Professor of Paleontology at the Faculdade de Ciências e Tecnologia da NOVA University Lisbon, Universidade Nova de Lisboa. He graduated in University of Évora, Universidade de Évora and received his PhD at Universidade Nova de Lisboa in 2005. He collaborates with Museu da Lourinhã, known for their dinosaur collection. His PhD advisor was Miguel Telles Antunes. He is an expert on dinosaurs, particularly Late Jurassic dinosaurs of Portugal, but he has also worked with specimens from Angola, the United States, USA, Greenland, China and Morocco. New dinosaur taxa he has helped name include ''Lourinhanosaurus, Lourinhanosaurus antunesi'' (1998), ''Dinheirosaurus, Dinheirosaurus lourinhanensis'' (1999), ''Tangvayosaurus, Tangvayosaurus hoffeti'' (1999), ''Draconyx, Draconyx loureiroi'' (2001), ''Lusotitan, Lusotitan atalaiensis'' (2003), ''Europasaurus, Europasaurus holgeri'' (2006), ''Allosa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2024 In Archosaur Paleontology
This article records new taxa of every kind of fossil archosaur that are scheduled to be Species description, described during 2024, as well as other significant discoveries and events related to the paleontology of archosaurs published in 2024. Pseudosuchians New pseudosuchian taxa General pseudosuchian research * Evidence of the impact of function on the evolution of the lower jaw morphology in crocodile-line archosaurs is presented by Rawson ''et al.'' (2024). * A review of studies on the thermometabolism of crocodile-line archosaurs from the preceding 20 years is published by Faure-Brac (2024). * Sennikov (2024) interprets Ornithosuchidae, ornithosuchids as macrophagous predators with specialized jaw apparatus, and notes analogs between them and saber-toothed therapsids (including mammals). * A study on the locomotion of ''Riojasuchus, Riojasuchus tenuisceps'' is published by von Baczko ''et al.'' (2024), who reconstruct ''R. tenuisceps'' as having an erect posture ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxonomy (biology)
In biology, taxonomy () is the science, scientific study of naming, defining (Circumscription (taxonomy), circumscribing) and classifying groups of biological organisms based on shared characteristics. Organisms are grouped into taxon, taxa (singular: taxon), and these groups are given a taxonomic rank; groups of a given rank can be aggregated to form a more inclusive group of higher rank, thus creating a taxonomic hierarchy. The principal ranks in modern use are domain (biology), domain, kingdom (biology), kingdom, phylum (''division'' is sometimes used in botany in place of ''phylum''), class (biology), class, order (biology), order, family (biology), family, genus, and species. The Swedish botanist Carl Linnaeus is regarded as the founder of the current system of taxonomy, having developed a ranked system known as Linnaean taxonomy for categorizing organisms. With advances in the theory, data and analytical technology of biological systematics, the Linnaean system has transfo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geologic Time Scale
The geologic time scale or geological time scale (GTS) is a representation of time based on the rock record of Earth. It is a system of chronological dating that uses chronostratigraphy (the process of relating strata to time) and geochronology (a scientific branch of geology that aims to determine the age of rocks). It is used primarily by Earth scientists (including geologists, paleontologists, geophysicists, geochemists, and paleoclimatologists) to describe the timing and relationships of events in geologic history. The time scale has been developed through the study of rock layers and the observation of their relationships and identifying features such as lithologies, paleomagnetic properties, and fossils. The definition of standardised international units of geological time is the responsibility of the International Commission on Stratigraphy (ICS), a constituent body of the International Union of Geological Sciences (IUGS), whose primary objective is to preci ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Othniel Charles Marsh
Othniel Charles Marsh (October 29, 1831 – March 18, 1899) was an American professor of paleontology. A prolific fossil collector, Marsh was one of the preeminent paleontologists of the nineteenth century. Among his legacies are the discovery or description of dozens of new species—including the stegosaurus and triceratops—and theories on the origins of birds. He spent his academic career at Yale College and was president of the National Academy of Sciences. Born into a modest family, Marsh was able to afford higher education thanks to the generosity of his wealthy uncle George Peabody. After graduating from Yale College in 1860 he traveled the world, studying anatomy, mineralogy and geology. He obtained a teaching position at Yale upon his return. From the 1870s to 1890s, he competed with rival paleontologist Edward Drinker Cope in a period of frenzied Western American expeditions known as the Bone Wars. Marsh's greatest legacy is the collection of Mesozoic reptiles, Creta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
