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Yanbeilong
''Yanbeilong'' (meaning "north of Yanmen Pass dragon") is an extinct genus of stegosaurian dinosaur from the Early Cretaceous (Albian) Zuoyun Formation of Shanxi, China. The type species, type and only species is ''Y. ultimus''. It is considered one of the youngest definitive records of the group, alongside ''Mongolostegus'' from Mongolia and possible ''Stegosaurus'' remains from the Hekou Group of China, both of which date to the Aptian–Albian. Discovery and naming The ''Yanbeilong'' holotype specimen, Shanxi Museum of Geology, SXMG V 00006, was discovered in 2011 in sediments of the Zuoyun Formation near Madaotou Township in Zuoyun County of Datong City, Shanxi Province, China. The specimen consists of the sacrum, both Ilium (bone), ilia, the left ischium, right Pubis (bone), pubis, seven dorsal vertebrae (two of which were isolated, the other five found in association with the ilio-sacral block), and a caudal vertebra. In 2024, Jia ''et al''. Species description, descri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yanbeilong Ultimus
''Yanbeilong'' (meaning "north of Yanmen Pass dragon") is an extinct genus of stegosaurian dinosaur from the Early Cretaceous (Albian) Zuoyun Formation of Shanxi, China. The type and only species is ''Y. ultimus''. It is considered one of the youngest definitive records of the group, alongside ''Mongolostegus'' from Mongolia and possible ''Stegosaurus'' remains from the Hekou Group of China, both of which date to the Aptian–Albian. Discovery and naming The ''Yanbeilong'' holotype specimen, SXMG V 00006, was discovered in 2011 in sediments of the Zuoyun Formation near Madaotou Township in Zuoyun County of Datong City, Shanxi Province, China. The specimen consists of the sacrum, both ilia, the left ischium, right pubis, seven dorsal vertebrae (two of which were isolated, the other five found in association with the ilio-sacral block), and a caudal vertebra. In 2024, Jia ''et al''. described ''Yanbeilong ultimus'' as a new genus and species of stegosaur based on these f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zuoyun Formation
The Zuoyun Formation is an Early Cretaceous (estimated Albian)'''' geologic formation in Shanxi Province, China.Yu,J.-X. (1986) The sporo-pollen assemblage from the Zuoyun Formation in Northwestern Shanxi and paleoclimate. ''Geological Review (Dizhi Lunping)'' Vol. 32:3, pg. 217- 224 Dinosaur fossils attributable to the genus level are known from this formation.'''' Dinosaurs Remains of the following dinosaurs have been found in the formation: * '' Yanbeilong ultimus'' See also * List of dinosaur-bearing rock formations This list of dinosaur-bearing rock formations is a list of geologic formations in which dinosaur fossils have been documented. Containing body fossils * List of stratigraphic units with dinosaur body fossils ** List of stratigraphic units with f ... References {{reflist, 2 Geologic formations of China Lower Cretaceous Series of Asia Cretaceous China Albian Stage Paleontology in Shanxi ... [...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 that will be published in 2024. Pseudosuchians New pseudosuchian taxa General pseudosuchian research * 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 and parasagittal gait, but do not conclusively resolve whether it was bipedal or quadrupedal. * A study on the anatomy of the skull and on the neurology of ''Tarjadia, Tarjadia ruthae'' is published by Desojo ''et al.'' (2024). * A study on the humeral bone histology of ''Bengg ... [...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] |
Caudal Vertebra
The spinal column, a defining synapomorphy shared by nearly all vertebrates,Hagfish are believed to have secondarily lost their spinal column is a moderately flexible series of vertebrae (singular vertebra), each constituting a characteristic irregular bone whose complex structure is composed primarily of bone, and secondarily of hyaline cartilage. They show variation in the proportion contributed by these two tissue types; such variations correlate on one hand with the cerebral/caudal rank (i.e., location within the backbone), and on the other with phylogenetic differences among the vertebrate taxa. The basic configuration of a vertebra varies, but the bone is its ''body'', with the central part of the body constituting the ''centrum''. The upper (closer to) and lower (further from), respectively, the cranium and its central nervous system surfaces of the vertebra body support attachment to the intervertebral discs. The posterior part of a vertebra forms a vertebral arch (i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dorsal Vertebrae
In vertebrates, thoracic vertebrae compose the middle segment of the vertebral column, between the cervical vertebrae and the lumbar vertebrae. In humans, there are twelve thoracic vertebrae and they are intermediate in size between the cervical and lumbar vertebrae; they increase in size going towards the lumbar vertebrae, with the lower ones being much larger than the upper. They are distinguished by the presence of facets on the sides of the bodies for articulation with the heads of the ribs, as well as facets on the transverse processes of all, except the eleventh and twelfth, for articulation with the tubercles of the ribs. By convention, the human thoracic vertebrae are numbered T1–T12, with the first one (T1) located closest to the skull and the others going down the spine toward the lumbar region. General characteristics These are the general characteristics of the second through eighth thoracic vertebrae. The first and ninth through twelfth vertebrae contain certai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pubis (bone)
In vertebrates, the pubic region ( la, pubis) is the most forward-facing (ventral and anterior) of the three main regions making up the coxal bone. The left and right pubic regions are each made up of three sections, a superior ramus, inferior ramus, and a body. Structure The pubic region is made up of a ''body'', ''superior ramus'', and ''inferior ramus'' (). The left and right coxal bones join at the pubic symphysis. It is covered by a layer of fat, which is covered by the mons pubis. The pubis is the lower limit of the suprapubic region. In the female, the pubic region is anterior to the urethral sponge. Body The body forms the wide, strong, middle and flat part of the pubic region. The bodies of the left and right pubic regions join at the pubic symphysis. The rough upper edge is the pubic crest, ending laterally in the pubic tubercle. This tubercle, found roughly 3 cm from the pubic symphysis, is a distinctive feature on the lower part of the abdominal wall; important ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ischium
The ischium () forms the lower and back region of the hip bone (''os coxae''). Situated below the and behind the pubis, it is one of three regions whose fusion creates the coxal bone. The superior portion of this region forms approximately one-third of the |
Ilium (bone)
The ilium () (plural ilia) is the uppermost and largest part of the hip bone, and appears in most vertebrates including mammals and birds, but not bony fish. All reptiles have an ilium except snakes, although some snake species have a tiny bone which is considered to be an ilium. The ilium of the human is divisible into two parts, the body and the wing; the separation is indicated on the top surface by a curved line, the arcuate line, and on the external surface by the margin of the acetabulum. The name comes from the Latin (''ile'', ''ilis''), meaning "groin" or "flank". Structure The ilium consists of the body and wing. Together with the ischium and pubis, to which the ilium is connected, these form the pelvic bone, with only a faint line indicating the place of union. The body ( la, corpus) forms less than two-fifths of the acetabulum; and also forms part of the acetabular fossa. The internal surface of the body is part of the wall of the lesser pelvis and gives or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sacrum
The sacrum (plural: ''sacra'' or ''sacrums''), in human anatomy, is a large, triangular bone at the base of the spine that forms by the fusing of the sacral vertebrae (S1S5) between ages 18 and 30. The sacrum situates at the upper, back part of the pelvic cavity, between the two wings of the pelvis. It forms joints with four other bones. The two projections at the sides of the sacrum are called the alae (wings), and articulate with the ilium at the L-shaped sacroiliac joints. The upper part of the sacrum connects with the last lumbar vertebra (L5), and its lower part with the coccyx (tailbone) via the sacral and coccygeal cornua. The sacrum has three different surfaces which are shaped to accommodate surrounding pelvic structures. Overall it is concave (curved upon itself). The base of the sacrum, the broadest and uppermost part, is tilted forward as the sacral promontory internally. The central part is curved outward toward the posterior, allowing greater room for the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shanxi Province
Shanxi (; ; formerly romanised as Shansi) is a landlocked province of the People's Republic of China and is part of the North China region. The capital and largest city of the province is Taiyuan, while its next most populated prefecture-level cities are Changzhi and Datong. Its one-character abbreviation is "" (), after the state of Jin that existed there during the Spring and Autumn period. The name ''Shanxi'' means "West of the Mountains", a reference to the province's location west of the Taihang Mountains. Shanxi borders Hebei to the east, Henan to the south, Shaanxi to the west and Inner Mongolia to the north. Shanxi's terrain is characterised by a plateau bounded partly by mountain ranges. Shanxi's culture is largely dominated by the ethnic Han majority, who make up over 99% of its population. Jin Chinese is considered by some linguists to be a distinct language from Mandarin and its geographical range covers most of Shanxi. Both Jin and Mandarin are spoken in Shanxi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Datong City
Datong is a prefecture-level city in northern Shanxi Province in the People's Republic of China. It is located in the Datong Basin at an elevation of and borders Inner Mongolia to the north and west and Hebei to the east. As of the 2020 census, it had a population of 3,105,591 of whom 1,790,452 lived in the built-up (or metro) area made of the 2 out 4 urban districts of Pingcheng and Yungang as Yunzhou and Xinrong are not conurbated yet. History The area of present-day Datong was close to the state of Dai, which was conquered by the Zhao clan of Jin in 457 BC. It was a frontier land between the agricultural Chinese and the nomads of the Great Steppe. The area was well known for its trade in horses. The area of present-day Datong eventually came under the control of the Qin dynasty, during which it was known as Pingcheng County (平城县) and formed part of the Qin commandery of Yanmen. Pingcheng County continued under the Han dynasty, which founded a site within ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
