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Polyodontosaurus
''Polyodontosaurus'' (meaning "many-toothed lizard") is a potentially dubious genus of troodontid dinosaur named in 1932 by Charles W. Gilmore for a left dentary from the Dinosaur Park Formation.Charles W. Gilmore, Gilmore, C. W. (1932). A new fossil lizard from the Belly River Formation of Alberta. ''Transactions of the Royal Society of Canada'', section 4, series 3 16:117-119 It had been considered a synonym of ''Stenonychosaurus'' or ''Troodon'' for a significant time, before being declared a ''nomen dubium''. The only known species is the type, ''P. grandis''. History of discovery The holotype and only known specimen of ''Polyodontosaurus'' was collected in 1928 by Charles Mortram Sternberg, and includes only a left dentary, lacking any teeth. Sternberg presented the dentary to Charles W. Gilmore, Charles Gilmore, who identified it as a lizard. Gilmore thus named the binomial ''Polyodontosaurus grandis'' for the new taxon in 1932. Sternberg revisited the material in 1951 and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Troodon
''Troodon'' ( ; ''Troödon'' in older sources) is a wastebasket taxon and a dubious genus of relatively small, bird-like dinosaurs known definitively from the Campanian age of the Late Cretaceous period (about 77 mya). It includes at least one species, ''Troodon formosus'', known from Montana. Discovered in October 1855, ''T. formosus'' was among the first dinosaurs found in North America, although it was thought to be a lizard until 1877. Several well-known troodontid specimens from the Dinosaur Park Formation in Alberta were once believed to be members of this genus. However, recent analyses in 2017 have found the genus to be undiagnostic and referred some of these specimens to the genus ''Stenonychosaurus'' (long believed to be synonymous with ''Troodon'') and others to the genus ''Latenivenatrix''. The genus name is Ancient Greek for "wounding tooth", referring to the teeth, which were different from those of most other theropods known at the time of their discovery. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stenonychosaurus
''Stenonychosaurus'' (meaning "narrow claw lizard") is a genus of troodontid dinosaur from the Late Cretaceous Dinosaur Park Formation of Alberta, Canada, as well as possibly the Two Medicine Formation. The type and only species, ''S. inequalis'', was named by Charles Mortram Sternberg in 1932, based on a foot, fragments of a hand, and some caudal vertebrae from the Late Cretaceous of Alberta. ''S. inequalis'' was reassigned in 1987 by Phil Currie to the genus ''Troodon'', which was reverted by the recognition of ''Stenonychosaurus'' as a separate genus from the possibly dubious ''Troodon'' in 2017 by Evans ''et al.'' and also later in the same year by Van der Reest and Currie. History of discovery The first specimens currently assigned to ''Troodon'' that were not teeth were both found by Sternberg in 1928, in the Dinosaur Park Formation of Alberta. The first was named ''Stenonychosaurus inequalis'' by Sternberg in 1932, based on a foot, fragments of a hand, and some tail verte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1932 In Paleontology
Paleobotany Newly described angiosperms Conodonts Newly named conodonts CR Stauffer, Stauffer & HJ Plummer, Plummer described the conodont genus ''Gondolella''.Texas Pennsylvanian conodonts and their stratigraphic relations. CR Stauffer, HJ Plummer - University of Texas Bulletin, 1932 Archosauromorphs Newly named basal archosauromorphs Newly named pseudosuchians Newly named dinosaurs Data courtesy of George Olshevsky's dinosaur genera list. Other diapsids Synapsids Non-mammalian References {{portal, Paleontology [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Troodontid
Troodontidae is a clade of bird-like theropod dinosaurs. During most of the 20th century, troodontid fossils were few and incomplete and they have therefore been allied, at various times, with many dinosaurian lineages. More recent fossil discoveries of complete and articulated specimens (including specimens which preserve feathers, eggs, embryos, and complete juveniles), have helped to increase understanding about this group. Anatomical studies, particularly studies of the most primitive troodontids, like ''Sinovenator'', demonstrate striking anatomical similarities with ''Archaeopteryx'' and primitive dromaeosaurids, and demonstrate that they are relatives comprising a clade called Paraves. Description Troodontids are a group of small, bird-like, gracile maniraptorans. All troodontids have unique features of the skull, such as large numbers of closely spaced teeth in the lower jaw. Troodontids have sickle-claws and raptorial hands, and some of the highest non-avian encephaliza ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dinosaur Park Formation
The Dinosaur Park Formation is the uppermost member of the Belly River Group (also known as the Judith River Group), a major geologic unit in southern Alberta. It was deposited during the Campanian stage of the Late Cretaceous, between about 76.5 and 74.4 million years ago. It was deposited in alluvial and coastal plain environments, and it is bounded by the nonmarine Oldman Formation below it and the marine Bearpaw Formation above it.Eberth, D.A. 2005. The geology. In: Currie, P.J., and Koppelhus, E.B. (eds), Dinosaur Provincial Park: A Spectacular Ancient Ecosystem Revealed. Indiana University Press: Bloomington and Indianapolis, p.54-82. . The Dinosaur Park Formation contains dense concentrations of dinosaur skeletons, both articulated and disarticulated, which are often found with preserved remains of soft tissues. Remains of other animals such as fish, turtles, and crocodilians, as well as plant remains, are also abundant. The formation has been named after Dinosaur Pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Troodontidae
Troodontidae is a clade of bird-like theropod dinosaurs. During most of the 20th century, troodontid fossils were few and incomplete and they have therefore been allied, at various times, with many dinosaurian lineages. More recent fossil discoveries of complete and articulated specimens (including specimens which preserve feathers, eggs, embryos, and complete juveniles), have helped to increase understanding about this group. Anatomical studies, particularly studies of the most primitive troodontids, like ''Sinovenator'', demonstrate striking anatomical similarities with '' Archaeopteryx'' and primitive dromaeosaurids, and demonstrate that they are relatives comprising a clade called Paraves. Description Troodontids are a group of small, bird-like, gracile maniraptorans. All troodontids have unique features of the skull, such as large numbers of closely spaced teeth in the lower jaw. Troodontids have sickle-claws and raptorial hands, and some of the highest non-avian enceph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
EK Troodontid
This list of informally named dinosaurs is a listing of dinosaurs (excluding Aves; birds and their extinct relatives) that have never been given formally published scientific names. This list only includes names that were not properly published (" unavailable names") and have not since been published under a valid name (see list of dinosaur genera for valid names). The following types of names are present on this list: * ''Nomen nudum'', Latin for "naked name": A name that has appeared in print but has not yet been formally published by the standards of the International Commission on Zoological Nomenclature. ''Nomina nuda'' (the plural form) are invalid, and are therefore not italicized as a proper generic name would be. * ''Nomen manuscriptum'', Latin for "manuscript name": A name that appears in manuscript but was not formally published. A ''nomen manuscriptum'' is equivalent to a ''nomen nudum'' for everything except the method of publication, and description. * '' Nomen ex d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anchiornis
''Anchiornis'' is a genus of small, four-winged Paraves, paravian dinosaurs, with only one known species, the type species ''Anchiornis huxleyi'', named for its similarity to modern birds. The Latin name ''Anchiornis'' derives from a Greek word meaning "near bird", and ''huxleyi'' refers to Thomas Henry Huxley, a contemporary of Charles Darwin. ''Anchiornis'' fossils have been found only in the Tiaojishan Formation of Liaoning Province, Liaoning, China, in rocks dated to the Late Jurassic, about 160 million years ago. It is known from hundreds of specimens, and given the exquisite preservation of some of these fossils, it became the first Mesozoic dinosaur species for which almost the entire life appearance could be determined, and an important source of information on the early evolution of birds. Description ''Anchiornis huxleyi'' was a small, Bipedalism, bipedal Theropoda, theropod dinosaur with a triangular skull bearing several details in common with Dromaeosauridae, drom ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mei Long
''Mei'' (from Chinese 寐 mèi ''Sleepy'') is a genus of duck-sized troodontid dinosaur first unearthed by paleontologists from the Yixian Formation in Liaoning, China in 2004. ''Mei'' lived during the Early Cretaceous period. The binomial name of its only species, ''Mei long'' (Chinese 寐 mèi and 龍 lóng), means ''sleeping dragon''. Description ''Mei'' is a troodontid, a group of small, bird-like, gracile maniraptorans. All troodontids have many unique features of the skull, such as closely spaced teeth in the lower jaw, and large numbers of teeth. Troodontids have sickle-claws and raptorial hands, and some of the highest non-avian encephalization quotients, meaning they were behaviourally advanced and had keen senses. The type fossil is a young juvenile about long, complete and exceptionally well preserved in three-dimensional detail, with the snout nestled beneath one of the forelimbs and the legs neatly folded beneath the body, similar to the roosting position of m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Talos Sampsoni
''Talos'' is an extinct genus of carnivorous bird-like theropod dinosaur, an advanced troodontid which lived during the late Cretaceous period (late Campanian, about 76 Ma) in the geographic area that is now Utah, United States. Discovery ''Talos'' is known only from the holotype specimen UMNH VP 19479, a partial postcranial skeleton of a subadult individual including the hindlimbs, pelvis, vertebral fragments, chevrons and the left ulna. It was discovered and collected in 2008 by M. J. Knell during the Kaiparowits Basin Project, initiated by the University of Utah in 2000, from the Kaiparowits Formation within the Grand Staircase–Escalante National Monument. It was first named by Lindsay E. Zanno, David J. Varricchio, Patrick M. O'Connor, Alan L. Titus, and Michael J. Knell in 2011 and the type species is ''Talos sampsoni''. The generic name comes from Talos, a giant bronze automaton in Greek mythology and is intended to be a pun on the English word ''talon''. The specif ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Byronosaurus
''Byronosaurus'' is a genus of troodontid dinosaur from the Late Cretaceous Period of Mongolia. Discovery and naming In 1993, Michael Novacek, a member of an American Museum of Natural History expedition to the Gobi Desert, discovered the skeleton of a small theropod at Ukhaa Tolgod. This was further excavated in 1994 and 1995. The find was illustrated in a publication in 1994. On 15 July 1996, at the Bolor's Hill site, about eight kilometers (five miles) away from the original location, a second specimen was discovered, a skull. In 2000, Mark Norell, Peter Makovicky and James Clark named and described the type species ''Byronosaurus jaffei''. The species name as a whole honoured Byron Jaffe, "in recognition of his family's support for the Mongolian Academy of Sciences-American Museum of Natural History Paleontological Expeditions". The holotype, IGM 100/983, was found in a layer of the Djadochta Formation dating from the late Campanian. It consists of a partial skeleton with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Campanian
The Campanian is the fifth of six ages of the Late Cretaceous Epoch on the geologic timescale of the International Commission on Stratigraphy (ICS). In chronostratigraphy, it is the fifth of six stages in the Upper Cretaceous Series. Campanian spans the time from 83.6 (± 0.2) to 72.1 (± 0.2) million years ago. It is preceded by the Santonian and it is followed by the Maastrichtian. The Campanian was an age when a worldwide sea level rise covered many coastal areas. The morphology of some of these areas has been preserved: it is an unconformity beneath a cover of marine sedimentary rocks. Etymology The Campanian was introduced in scientific literature by Henri Coquand in 1857. It is named after the French village of Champagne in the department of Charente-Maritime. The original type locality was a series of outcrop near the village of Aubeterre-sur-Dronne in the same region. Definition The base of the Campanian Stage is defined as a place in the stratigraphic column wher ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
