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Kota Formation
The Kota Formation is a geological formation in India. The precise age of Kota Formation are uncertain, but it dates from the Early to Middle Jurassic, and is split into a Lower Member and Upper Member.Prasad GVR, and Manhas BK. 2007A new docodont mammal from the Jurassic Kota Formation of India Palaeontologia electronica, 10.2: 1-11 The lower member is thought to be Hettangian-Pliensbachian.Weishampel, David B; et al. (2004). "Dinosaur distribution (Early Jurassic, Asia)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. Pp. 534–535. . While the upper unit is thought to be Toarcian, but may possibly extend into the Aalenian. It conformably overlies the Dharmaram Formation which is Late Triassic to earliest Jurassic and is unconformably overlain by the Early Cretaceous Gangapur Formation. The lower member is approximately 100 m thick while the upper member is 490 m thick. Both subunits primari ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geological Formation
A geological formation, or simply formation, is a body of rock having a consistent set of physical characteristics ( lithology) that distinguishes it from adjacent bodies of rock, and which occupies a particular position in the layers of rock exposed in a geographical region (the stratigraphic column). It is the fundamental unit of lithostratigraphy, the study of strata or rock layers. A formation must be large enough that it can be mapped at the surface or traced in the subsurface. Formations are otherwise not defined by the thickness of their rock strata, which can vary widely. They are usually, but not universally, tabular in form. They may consist of a single lithology (rock type), or of alternating beds of two or more lithologies, or even a heterogeneous mixture of lithologies, so long as this distinguishes them from adjacent bodies of rock. The concept of a geologic formation goes back to the beginnings of modern scientific geology. The term was used by Abraham Gottlob Wer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Andhrasaurus
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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bharatagama
''Bharatagama'' is an extinct genus of lepidosaur from the Early Jurassic of India. It has been suggested to be one of the oldest known lizards and the oldest known iguanian. The type and only species is ''Bharatagama rebbanensis'', named in 2002. Over one hundred fossils of ''Bharatagama'' have been found in the Kota Formation, which outcrops in the Pranhita–Godavari Basin and dates back to about 190 million years ago (Ma). Despite its abundance, ''Bharatagama'' is known only from isolated jaw bones mixed together in microvertebrate assemblages with equally fragmentary remains of fish, sphenodontians, dinosaurs, crocodylomorphs, and mammals. These fossils represent all stages of development, from hatchlings to adults. The total length of the skull in adult specimens is estimated to have been about . Later analysis suggested that the taxon might be a member of Rhynchocephalia. Description and relationships ''Bharatagama'' has been suggested to a group of iguanians called Ac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kotasaurus
''Kotasaurus'' ( ; meaning "Kota Formation lizard") is a genus of sauropod dinosaur from the Early Jurassic period (Sinemurian–Pliensbachian). The only known species is ''Kotasaurus yamanpalliensis''. It was discovered in the Kota Formation of Telangana, India and shared its habitat with the related ''Barapasaurus''. So far the remains of at least 12 individuals are known. The greater part of the skeleton is known, but the skull is missing, with the exception of two teeth. Like all sauropods, it was a large, quadrupedal herbivore with long neck and tail. Description ''Kotasaurus'' is one of the most basal sauropods known. The general body plan was that of a typical sauropod, but in several basal (plesiomorphic) features it resembles prosauropods. Like all sauropods, ''Kotasaurus'' was an obligate quadruped, while prosauropods were primitively bipedal. The body length is estimated at nine meters, with a weight of 2.5 tonnes, and therefore already comparable with that of later ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dandakosaurus
''Dandakosaurus'' (meaning "Dandakaranya lizard") is a dubious genus of extinct averostran theropod dinosaur from the Kota Formation, Andhra Pradesh, India. It lived 183 to 175 million years ago from the latest Pliensbachian to the late Toarcian stages of the Early Jurassic. It is currently classified as Averostra ''incertae sedis'', variously suggested to be a ceratosaur or basal tetanuran. The holotype is partial pubis, GSI 1/54Y/76, discovered between 1958 and 1961 and described as a carnosaur in 1962. The type species, ''D. indicus'', was named by Yadagiri in 1982. Little is known about the genus and some paleontologists consider it to be a '' nomen dubium''. In 2016 it was estimated to be 10 meters (33 feet) in length and 2.3 tonnes (2.5 short tons) in weight. See also * Timeline of ceratosaur research This timeline of ceratosaur research is a chronological listing of events in the history of paleontology focused on the ceratosaurs, a group of relatively primitive, o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pterosaur
Pterosaurs (; from Greek ''pteron'' and ''sauros'', meaning "wing lizard") is an extinct clade of flying reptiles in the order, Pterosauria. They existed during most of the Mesozoic: from the Late Triassic to the end of the Cretaceous (228 to 66 million years ago). Pterosaurs are the earliest vertebrates known to have evolved powered flight. Their wings were formed by a membrane of skin, muscle, and other tissues stretching from the ankles to a dramatically lengthened fourth finger. There were two major types of pterosaurs. Basal pterosaurs (also called 'non-pterodactyloid pterosaurs' or 'rhamphorhynchoids') were smaller animals with fully toothed jaws and, typically, long tails. Their wide wing membranes probably included and connected the hind legs. On the ground, they would have had an awkward sprawling posture, but the anatomy of their joints and strong claws would have made them effective climbers, and some may have even lived in trees. Basal pterosaurs were insectiv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fish
Fish are aquatic, craniate, gill-bearing animals that lack limbs with digits. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish as well as various extinct related groups. Approximately 95% of living fish species are ray-finned fish, belonging to the class Actinopterygii, with around 99% of those being teleosts. The earliest organisms that can be classified as fish were soft-bodied chordates that first appeared during the Cambrian period. Although they lacked a true spine, they possessed notochords which allowed them to be more agile than their invertebrate counterparts. Fish would continue to evolve through the Paleozoic era, diversifying into a wide variety of forms. Many fish of the Paleozoic developed external armor that protected them from predators. The first fish with jaws appeared in the Silurian period, after which many (such as sharks) became formidable marine predators rather than just the prey of arthropods. Mos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chanda District
Chandrapur district (Marathi pronunciation: ͡ʃən̪d̪ɾəpuːɾ (earlier known as ''Chanda district'') is a district in the Nagpur Division in the Indian state of Maharashtra. Chandrapur was the largest district in India until the Gadchiroli and Sironcha tehsils were separated as Gadchiroli district in 1981. In 2011, the district population was 2,204,307. Chandrapur district is known for its super thermal power station, and its vast reserves of coal in Wardha Valley Coalfield. Chandrapur also has large reservoirs of limestone which is a raw material for cement manufacturing in the district. Chandrapur district is known for its cleanliness. Now Chandrapur city is in the top 10 cleanest cities India and 2 in Maharashtra after Navi Mumbai by The minister of housing and urban affairs rank cities based on the cleanliness index. Tadoba Andhari Tiger Reserve in the district is one of India's twenty-eight Project Tiger reserves. The 2015 census of tigers found that 120 of Mahar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Campylognathoides
''Campylognathoides'' ("curved jaw", Strand 1928) is an extinct genus of pterosaur discovered in the Württemberg Lias deposits (dated to the early Toarcian ageBarrett, P. M., Butler, R. J., Edwards, N. P., & Milner, A. R. (2008). "Pterosaur distribution in time and space: an atlas". ''Zitteliana'', 61–107/ref>) of Germany; this first specimen however, consisted only of wing fragments. Further better preserved specimens were found in the Holzmaden shale; based on these specimens, Felix Plieninger erected a new genus. Discovery In 1858 Friedrich August Quenstedt named a new species of ''Pterodactylus'': ''P. liasicus''. It was based on a fossil, holotype GPIT 9533, consisting of some wing bones, found on the Wittberg near Metzingen in layers dating from the early Toarcian, about 180 million years old. The specific name referred to the Lias. Quenstedt thought he had identified long metacarpals in the wing, concluding that the new species was therefore not belonging to more bas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Barapasaurus DB
''Barapasaurus'' ( ) is a genus of basal sauropod dinosaur from Early Jurassic rocks of India. The only species is ''B. tagorei''. ''Barapasaurus'' comes from the lower part of the Kota Formation, that dates back to the Sinemurian and Pliensbachian stages of the early Jurassic. It is therefore one of the earliest known sauropods. ''Barapasaurus'' is known from approximately 300 bones from at least six individuals, so that the skeleton is almost completely known except for the anterior cervical vertebrae and the skull. This makes ''Barapasaurus'' one of the most completely known sauropods from the early Jurassic. Etymology The name ''Barapasaurus'' ("big-legged lizard") is derived from ''bara'' meaning 'big' and ''pa'' meaning 'leg' in several Indian languages including Bengali; the Greek word ''sauros'' means 'lizard'. This name was used as a ''nomen nudum'' since a femur measuring over 1.7 m was unearthed at 1961. The specific name ''tagorei'' means 'Tagore's', which honors B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
