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Vectiraptor
''Vectiraptor'' (meaning "Isle of Wight thief") is a genus of dromaeosaurid dinosaur from the Barremian aged Wessex Formation of the United Kingdom. The type and only species is ''Vectiraptor greeni'', known from associated dorsal vertebrae and a partial sacrum. Discovery and naming ''Vectiraptor'' was initially discovered by amateur paleontologist Mick Green in 2004 in rocks of the Wessex Formation, below the cliffs of Compton Bay on the Isle of Wight, United Kingdom. The finds form the holotype IWCMS. 2021.31.1-3, consisting of two dorsal vertebrae. Later a partial sacrum of three vertebrae, IWCMS. 2021.31.2, would be discovered by the late Nick Chase. The element has been determined to belong to the holotype as all fossil elements were discovered over a short time period, and each find was located within several metres of the others. The holotype represents an adult individual, the age of which was estimated at twenty to thirty years on the basis of growth lines in the bone ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vectiraptor Site 2
''Vectiraptor'' (meaning "Isle of Wight thief") is a genus of dromaeosaurid dinosaur from the Barremian aged Wessex Formation of the United Kingdom. The type and only species is ''Vectiraptor greeni'', known from associated dorsal vertebrae and a partial sacrum. Discovery and naming ''Vectiraptor'' was initially discovered by amateur paleontologist Mick Green in 2004 in rocks of the Wessex Formation, below the cliffs of Compton Bay on the Isle of Wight, United Kingdom. The finds form the holotype IWCMS. 2021.31.1-3, consisting of two dorsal vertebrae. Later a partial sacrum of three vertebrae, IWCMS. 2021.31.2, would be discovered by the late Nick Chase. The element has been determined to belong to the holotype as all fossil elements were discovered over a short time period, and each find was located within several metres of the others. The holotype represents an adult individual, the age of which was estimated at twenty to thirty years on the basis of growth lines in the bone ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vectiraptor Greeni Dorsal Vertebra By Nick Longrich
''Vectiraptor'' (meaning "Isle of Wight thief") is a genus of dromaeosaurid dinosaur from the Barremian aged Wessex Formation of the United Kingdom. The type and only species is ''Vectiraptor greeni'', known from associated dorsal vertebrae and a partial sacrum. Discovery and naming ''Vectiraptor'' was initially discovered by amateur paleontologist Mick Green in 2004 in rocks of the Wessex Formation, below the cliffs of Compton Bay on the Isle of Wight, United Kingdom. The finds form the holotype IWCMS. 2021.31.1-3, consisting of two dorsal vertebrae. Later a partial sacrum of three vertebrae, IWCMS. 2021.31.2, would be discovered by the late Nick Chase. The element has been determined to belong to the holotype as all fossil elements were discovered over a short time period, and each find was located within several metres of the others. The holotype represents an adult individual, the age of which was estimated at twenty to thirty years on the basis of growth lines in the bone ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wessex Formation
The Wessex Formation is a fossil-rich English geological formation that dates from the Berriasian to Barremian stages (about 145–125 million years ago) of the Early Cretaceous. It forms part of the Wealden Group and underlies the younger Vectis Formation and overlies the Durlston Formation. The dominant lithology of this unit is mudstone with some interbedded sandstones. It is part of the strata of the Wessex Basin, exposed in both the Isle of Purbeck and the Isle of Wight. While the Purbeck sections are largely barren of vertebrate remains, the Isle of Wight sections are well known for producing the richest and most diverse fauna in Early Cretaceous Europe. Nomenclatural History The Wessex Formation has historically alternately been called the "Variegated Marls And Sandstones", a name used by W. J. Arkell in his 1947 map of the Isle of Purbeck as well as the "Wealden Marls" It was given its current formal name by Daley and Stewart in 1979 Stratigraphy and Lithology In ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eudromaeosaurs
Eudromaeosauria ("true dromaeosaurs") is a subgroup of terrestrial Dromaeosauridae, dromaeosaurid theropod dinosaurs. They were relatively small to medium-sized, feathered hypercarnivores (with diets consisting almost entirely of other terrestrial vertebrates) that flourished in the Cretaceous Period (geology), Period. Eudromaeosaur fossils are known almost exclusively from the northern hemisphere. They first appeared in the early Cretaceous Period (early Aptian stage, about 124 million years ago) and survived until the end of the Cretaceous (Maastrichtian stage, Ma). The earliest known definitive eudromaeosaur is the dromaeosaurine ''Utahraptor ostrommaysi'', from the Cedar Mountain Formation, dated to 124 million years ago. However, the earlier (143-million-year-old) fossils such as those of ''Nuthetes destructor'' and several indeterminate teeth dating to the Kimmeridgian stage may represent eudromaeosaurs. Description While other dromaeosaurids filled a variety of speciali ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eudromaeosauria
Eudromaeosauria ("true dromaeosaurs") is a subgroup of terrestrial dromaeosaurid theropod dinosaurs. They were relatively small to medium-sized, feathered hypercarnivores (with diets consisting almost entirely of other terrestrial vertebrates) that flourished in the Cretaceous Period. Eudromaeosaur fossils are known almost exclusively from the northern hemisphere. They first appeared in the early Cretaceous Period (early Aptian stage, about 124 million years ago) and survived until the end of the Cretaceous (Maastrichtian stage, Ma). The earliest known definitive eudromaeosaur is the dromaeosaurine '' Utahraptor ostrommaysi'', from the Cedar Mountain Formation, dated to 124 million years ago. However, the earlier (143-million-year-old) fossils such as those of '' Nuthetes destructor'' and several indeterminate teeth dating to the Kimmeridgian stage may represent eudromaeosaurs. Description While other dromaeosaurids filled a variety of specialized ecological niches, mainly tho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dromaeosaurid
Dromaeosauridae () is a family of feathered theropod dinosaurs. They were generally small to medium-sized feathered carnivores that flourished in the Cretaceous Period. The name Dromaeosauridae means 'running lizards', from Greek ('), meaning 'runner', and ('), meaning 'lizard'. In informal usage, they are often called raptors (after ''Velociraptor''), a term popularized by the film '' Jurassic Park''; a few types include the term "raptor" directly in their name and have come to emphasize their bird-like appearance and speculated bird-like behavior. Dromaeosaurid fossils have been found across the globe in North America, Europe, Africa, Asia, South America and Antarctica, with some fossils giving credence to the possibility that they inhabited Australia as well. They first appeared in the mid-Jurassic Period (late Bathonian stage, about 167 million years ago) and survived until the end of the Cretaceous (Maastrichtian stage, 66 ma), existing until the Cretaceous–Paleogene ex ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dromaeosauridae
Dromaeosauridae () is a family of feathered theropod dinosaurs. They were generally small to medium-sized feathered carnivores that flourished in the Cretaceous Period. The name Dromaeosauridae means 'running lizards', from Greek ('), meaning 'runner', and ('), meaning 'lizard'. In informal usage, they are often called raptors (after ''Velociraptor''), a term popularized by the film '' Jurassic Park''; a few types include the term "raptor" directly in their name and have come to emphasize their bird-like appearance and speculated bird-like behavior. Dromaeosaurid fossils have been found across the globe in North America, Europe, Africa, Asia, South America and Antarctica, with some fossils giving credence to the possibility that they inhabited Australia as well. They first appeared in the mid-Jurassic Period (late Bathonian stage, about 167 million years ago) and survived until the end of the Cretaceous (Maastrichtian stage, 66 ma), existing until the Cretaceous–Paleogene ex ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Air Sacs
Air sacs are spaces within an organism where there is the constant presence of air. Among modern animals, birds possess the most air sacs (9–11), with their extinct dinosaurian relatives showing a great increase in the pneumatization (presence of air) in their bones. Theropods, like ''Aerosteon'', have many air sacs in the body that are not just in bones, and they can be identified as the more primitive form of modern bird airways. Sauropods are well known for the number of air pockets in their bones (especially vertebra), although one theropod, '' Deinocheirus'', shows a rivalling number of air pockets. Function From about 1870 onwards scientists have generally agreed that the post-cranial skeletons of many dinosaurs contained many air-filled cavities ( postcranial skeletal pneumaticity), especially in the vertebrae. Pneumatization of the skull (such as paranasal sinuses) is found in both synapsids and archosaurs, but postcranial pneumatization is found only in birds, non-avia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neural Spine
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 (in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Autapomorphies
In phylogenetics, an autapomorphy is a distinctive feature, known as a derived trait, that is unique to a given taxon. That is, it is found only in one taxon, but not found in any others or outgroup taxa, not even those most closely related to the focal taxon (which may be a species, family or in general any clade). It can therefore be considered an apomorphy in relation to a single taxon. The word ''autapomorphy'', first introduced in 1950 by German entomologist Willi Hennig, is derived from the Greek words αὐτός, ''autos'' "self"; ἀπό, ''apo'' "away from"; and μορφή, ''morphḗ'' = "shape". Discussion Because autapomorphies are only present in a single taxon, they do not convey information about relationship. Therefore, autapomorphies are not useful to infer phylogenetic relationships. However, autapomorphy, like synapomorphy and plesiomorphy is a relative concept depending on the taxon in question. An autapomorphy at a given level may well be a synapomorphy at ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ribs
The rib cage, as an enclosure that comprises the ribs, vertebral column and sternum in the thorax of most vertebrates, protects vital organs such as the heart, lungs and great vessels. The sternum, together known as the thoracic cage, is a semi-rigid bony and cartilaginous structure which surrounds the thoracic cavity and supports the shoulder girdle to form the core part of the human skeleton. A typical human thoracic cage consists of 12 pairs of ribs and the adjoining costal cartilages, the sternum (along with the manubrium and xiphoid process), and the 12 thoracic vertebrae articulating with the ribs. Together with the skin and associated fascia and muscles, the thoracic cage makes up the thoracic wall and provides attachments for extrinsic skeletal muscles of the neck, upper limbs, upper abdomen and back. The rib cage intrinsically holds the muscles of respiration ( diaphragm, intercostal muscles, etc.) that are crucial for active inhalation and forced exhalation, and t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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