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Nodosaurine
Nodosaurinae is a subfamily of nodosaurid ankylosaurs from the Cretaceous of Europe, North America, and South America. The group is defined as the largest clade containing ''Nodosaurus textilis'' but not '' Hylaeosaurus armatus'', '' Mymoorapelta maysi'', or ''Polacanthus foxii'', and was formally named in 2021 by Madzia and colleagues, who utilized the name of Othenio Abel in 1919, who created the term to unite ''Ankylosaurus'', ''Hierosaurus'' and ''Stegopelta''. The name has been significantly refined in content since Abel first used it to unite all quadrupedal, plate-armoured ornithischians, now including a significant number of taxa from the Early Cretaceous through Maastrichtian of Europe, North America, and Argentina. Previous informal definitions of the group described the clade as all taxa closer to ''Panoplosaurus'', or ''Panoplosaurus'' and ''Nodosaurus'', than to the early ankylosaurs ''Sarcolestes'', ''Hylaeosaurus'', ''Mymoorapelta'' or ''Polacanthus'', which was refle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Patagopelta
''Patagopelta'' (meaning "Patagonian shield") is an extinct genus of nodosaurine dinosaur from the Late Cretaceous (upper Campanian–lower Maastrichtian) Allen Formation of Argentina. The genus contains a Monotypic taxon, single species, ''P. cristata'', known from a partial skeleton. ''Patagopelta'' is a very small ankylosaur, comparable in size to the dwarf nodosaurid ''Struthiosaurus'', about long. Discovery and naming The ''Patagopelta'' fossil material was found in sediments of the Allen Formation (Salitral Moreno locality) near General Roca, Río Negro Province, Argentina. This locality is dated to the upper Campanian to lower Maastrichtian ages of the Late Cretaceous period. The first remains were described in 1996 and often appeared in the literature as the "Argentinian ankylosaur". The fossil material consists of various osteoderms, a tooth, dorsal vertebrae, dorsal and caudal vertebrae, caudal vertebrae, and femora. The ''Patagopelta'' holotype specimen, Carlos Ameg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nodosauridae
Nodosauridae is a family of ankylosaurian dinosaurs, from the Late Jurassic to the Late Cretaceous period in what is now North America, South America, Europe, and Asia. Description Nodosaurids, like their close relatives the ankylosaurids, were heavily armored dinosaurs adorned with rows of bony armor nodules and spines (osteoderms), which were covered in keratin sheaths. All nodosaurids, like other ankylosaurians, were medium-sized to large, heavily built, quadrupedal, herbivorous dinosaurs, possessing small, leaf-shaped teeth. Unlike ankylosaurids, nodosaurids lacked mace-like tail clubs, instead having flexible tail tips. Many nodosaurids had spikes projecting outward from their shoulders. One particularly well-preserved nodosaurid "mummy", known as the Suncor nodosaur (''Borealopelta markmitchelli''), preserved a nearly complete set of armor in life position, as well as the keratin covering and mineralized remains of the underlying skin, which indicate reddish dorsal pigm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Panoplosaurini
Panoplosaurini (derived from ''Panoplosaurus'', "all shield reptile") is a clade of nodosaurid ankylosaurs from the Cretaceous of North America and South America. The group is defined as the largest clade containing '' Panoplosaurus mirus'', but not '' Nodosaurus textilis'' or '' Struthiosaurus austriacus'', and was named in 2021 by Madzia and colleagues for the group found in many previous analyses, both morphological and phylogenetic. Panoplosaurini includes not only the Late Cretaceous ''Panoplosaurus'', '' Denversaurus'' and ''Edmontonia'', but also the mid Cretaceous '' Animantarx'' and '' Texasetes'', as well as '' Patagopelta''. However, in the study describing it, its authors only placed it as a nodosaurine outside Panoplosaurini. The approximately equivalent clade Panoplosaurinae, named in 1929 by Franz Nopcsa, but was not significantly used until Robert Bakker reused the name in 1988, alongside the new clades Edmontoniinae and Edmontoniidae, which were considered to unit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Europe
Europe is a large peninsula conventionally considered a continent in its own right because of its great physical size and the weight of its history and traditions. Europe is also considered a subcontinent of Eurasia and it is located entirely in the Northern Hemisphere and mostly in the Eastern Hemisphere. Comprising the westernmost peninsulas of Eurasia, it shares the continental landmass of Afro-Eurasia with both Africa and Asia. It is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the west, the Mediterranean Sea to the south and Asia to the east. Europe is commonly considered to be separated from Asia by the watershed of the Ural Mountains, the Ural River, the Caspian Sea, the Greater Caucasus, the Black Sea and the waterways of the Turkish Straits. "Europe" (pp. 68–69); "Asia" (pp. 90–91): "A commonly accepted division between Asia and Europe ... is formed by the Ural Mountains, Ural River, Caspian Sea, Caucasus Mountains, and the Blac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maastrichtian
The Maastrichtian () is, in the ICS geologic timescale, the latest age (uppermost stage) of the Late Cretaceous Epoch or Upper Cretaceous Series, the Cretaceous Period or System, and of the Mesozoic Era or Erathem. It spanned the interval from . The Maastrichtian was preceded by the Campanian and succeeded by the Danian (part of the Paleogene and Paleocene). The Cretaceous–Paleogene extinction event (formerly known as the Cretaceous–Tertiary extinction event) occurred at the end of this age. In this mass extinction, many commonly recognized groups such as non-avian dinosaurs, plesiosaurs and mosasaurs, as well as many other lesser-known groups, died out. The cause of the extinction is most commonly linked to an asteroid about wide colliding with Earth, ending the Cretaceous. Stratigraphic definitions Definition The Maastrichtian was introduced into scientific literature by Belgian geologist André Hubert Dumont in 1849, after studying rock strata of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Early Cretaceous
The Early Cretaceous (geochronological name) or the Lower Cretaceous ( chronostratigraphic name), is the earlier or lower of the two major divisions of the Cretaceous. It is usually considered to stretch from 145 Ma to 100.5 Ma. Geology Proposals for the exact age of the Barremian-Aptian boundary ranged from 126 to 117 Ma until recently (as of 2019), but based on drillholes in Svalbard the defining early Aptian Oceanic Anoxic Event 1a (OAE1a) was carbon isotope dated to 123.1±0.3 Ma, limiting the possible range for the boundary to c. 122–121 Ma. There is a possible link between this anoxic event and a series of Early Cretaceous large igneous provinces (LIP). The Ontong Java- Manihiki- Hikurangi large igneous province, emplaced in the South Pacific at c. 120 Ma, is by far the largest LIP in Earth's history. The Ontong Java Plateau today covers an area of 1,860,000 km2. In the Indian Ocean another LIP began to form at c. 120 Ma, the Kergue ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stegopelta
''Stegopelta'' (meaning "roofed shield") is a genus of struthiosaurin nodosaurid dinosaur. It is based on a partial skeleton from the latest Albian- earliest Cenomanian-age Lower and Upper Cretaceous Belle Fourche Member of the Frontier Formation of Fremont County, Wyoming, USA. History In 1905, Samuel Wendell Williston described FMNH UR88, a partial armored dinosaur skeleton consisting of a maxilla fragment, seven cervical and two dorsal vertebrae, part of a sacrum and both ilia, caudal vertebrae, parts of the scapulae, both humeral heads, portions of an ulna and both radii, a metacarpal, partial tibia, metatarsal, and armor including a shoulder spine and neck ring.Carpenter, K., and Kirkland, J.I. (1998). Review of Lower and middle Cretaceous ankylosaurs from North America. In: Lucas, S.G., Kirkland, J.I., and Estep, J.W. (eds.). ''Lower and Middle Cretaceous Terrestrial Ecosystems''. ''New Mexico Museum of Natural History and Science Bulletin'' 14:249-270. The specimen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hierosaurus
''Hierosaurus'' (meaning "sacred lizard") is an extinct genus of nodosaurid ankylosaur which lived during the Late Cretaceous 87 to 82 million years ago. Its fossils were found in the Smoky Hill Chalk Member of the Niobrara Formation, in western Kansas, which would have been near the middle of the Western Interior Sea during the Late Cretaceous. It was a nodosaurid, an ankylosaur without a clubbed tail. The only species of this genus, ''Hierosaurus sternbergii'', was described by George Wieland on the basis of cranial and postcranial osteoderms collected by Charles Hazelius Sternberg in the Niobrara Formation of western Kansas. Nowadays, ''Hierosaurus'' is considered a ''nomen dubium'', and a second species, ''H. coleii'', was reassigned to the new genus ''Niobrarasaurus'' in 1995.M. K. Vickaryous, T. Maryanska, and D. B. Weishampel. 2004. Ankylosauria. In D. B. Weishampel, P. Dodson, and H. Osmolska (eds.), The Dinosauria (second edition). University of California Press, Berk ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ankylosaurus
''Ankylosaurus'' is a genus of armored dinosaur. Its fossils have been found in geological formations dating to the very end of the Cretaceous Period, about 68–66 million years ago, in western North America, making it among the last of the non-avian dinosaurs. It was named by Barnum Brown in 1908; it is monotypic, containing only ''A. magniventris''. The generic name means "fused" or "bent lizard", and the specific name means "great belly". A handful of specimens have been excavated to date, but a complete skeleton has not been discovered. Though other members of Ankylosauria are represented by more extensive fossil material, ''Ankylosaurus'' is often considered the archetypal member of its group, despite having some unusual features. Possibly the largest-known ankylosaurid, ''Ankylosaurus'' is estimated to have been between long and to have weighed between . It was quadrupedal, with a broad, robust body. It had a wide, low skull, with two horns pointing backward from the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2021 In Paleontology
Flora Plants Fungi New taxa Research * Exceptionally preserved specimens of ''Tawuia'', providing new information on the anatomy of this organism, are described from the Tonian Liulaobei and Shiwangzhuang formations (China) by Tang ''et al.'' (2021), who interpret ''Tawuia'' as a coenocytic eukaryote, possibly a macroalga. * Microfossils which may represent early terrestrial fungi are described from the Ediacaran Doushantuo Formation ( China) by Gan ''et al.'' (2021). * A Rhynie chert fossil '' Mycokidstonia sphaerialoides'', originally interpreted as an ascomycete, is reclassified as a member of Glomeromycota belonging to the family Ambisporaceae by Walker ''et al.'' (2021). * Carboniferous organism '' Oochytrium lepidodendri'', originally classified as a fungus, is reinterpreted as an oomycete by Strullu-Derrien ''et al.'' (2021). * Probable fossils of multicellular eukaryotic macroalgae (possibly with a green algal affinity) are described from the Tonian Dolores Creek ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polacanthus Foxii
''Polacanthus'', deriving its name from the Ancient Greek polys-/πολύς- "many" and akantha/ἄκανθα "thorn" or "prickle", is an early armoured, spiked, plant-eating ankylosaurian dinosaur from the early Cretaceous period of England. In the genus ''Polacanthus'' several species have been named but only the type species ''Polacanthus foxii'' is today seen as valid. ''Polacanthus'' was a quadrupedal ornithischian or "bird-hipped" dinosaur. It lived 130 to 125 million years ago in what is now western Europe.Holtz, Thomas R. Jr. (2012) ''Dinosaurs: The Most Complete, Up-to-Date Encyclopedia for Dinosaur Lovers of All Ages,''https://www.geol.umd.edu/~tholtz/dinoappendix/appendix.html ''Polacanthus foxii'' was named after a find on the Isle of Wight in 1865. There are not many fossil remains of this creature, and some important anatomical features, such as its skull, are poorly known. Early depictions often gave it a very generic head as it was only known from the rear half ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mymoorapelta Maysi
''Mymoorapelta'' (Meaning "Vannetta Moore and Pete and Marilyn Mygatt's shield" after a combination of the names of the discoverers of the Mygatt-Moore Quarry that fossils were originally collected from, and pɛltə "shield") is a monospecific genus of nodosaurid ankylosaur, a group of heavily armored, herbivorous, quadrupedal dinosaurs, from the Late Jurassic (Kimmeridgian-Tithonian, around 155 to 150 million years ago) Morrison Formation (Brushy Basin Member) of western Colorado and central Utah, USA. Few specimens are known, but the most complete one is the holotype individual from the Mygatt-Moore Quarry that includes many osteoderms, a partial skull, vertebrae, and other bones. It was initially described by James Kirkland and Kenneth Carpenter in 1994. Along with ''Gargoyleosaurus'', it is one of the earliest known nodosaurids. ''Mymoorapleta'' is one of the smaller known nodosaurids, with the estimated length of the largest specimen only reaching . It had a narrow snout a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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