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Veterupristisaurus
''Veterupristisaurus'' is an extinct genus of carcharodontosaurid theropod dinosaur known from the Jurassic of Tendaguru, Lindi Region of southeastern Tanzania. Discovery and naming ''Veterupristisaurus'' is known from the holotype specimen MB R 1938, an isolated middle caudal vertebra. Two partially fused posterior middle caudal vertebrae, MB R 2166, from the same locality as the holotype, are referred to this genus and most probably came from the same individual. The anterior caudal vertebra, MB R 1940, may also represent this genus. The holotype was collected in the St (EH) locality of the Tendaguru in German East Africa, from the Middle Dinosaur Member of the Tendaguru Formation, dating to the late Kimmeridgian to earliest Tithonian faunal stage of the Late Jurassic, about 154-150 million years ago. The holotype was originally referred to ''Ceratosaurus? roechlingi'' by Werner Janensch in 1925. ''Veterupristisaurus'' was named by Oliver ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carcharodontosaurid
Carcharodontosauridae (carcharodontosaurids; from the Greek καρχαροδοντόσαυρος, ''carcharodontósauros'': "shark-toothed lizards") is a group of carnivorous theropod dinosaurs. In 1931, Ernst Stromer named Carcharodontosauridae as a family, which, in modern paleontology, indicates a clade within Carnosauria. Carcharodontosaurids include some of the largest land predators ever known: ''Giganotosaurus'', '' Mapusaurus'', '' Carcharodontosaurus'', and '' Tyrannotitan'' all rivaled or exceeded ''Tyrannosaurus'' in size. A 2015 paper by Christophe Hendrickx and colleagues gives a maximum length estimate of for the largest carcharodontosaurids, while the smallest carcharodontosaurids were estimated to have been at least long. Evolution Along with the spinosaurids, carcharodontosaurids were the largest predators in the early and middle Cretaceous throughout Gondwana, with species also present in North America (''Acrocanthosaurus''), Europe ('' Concavenator'') an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tendaguru Formation
The Tendaguru Formation, or Tendaguru Beds are a highly fossiliferous formation and Lagerstätte located in the Lindi Region of southeastern Tanzania. The formation represents the oldest sedimentary unit of the Mandawa Basin, overlying Neoproterozoic basement, separating by a long hiatus and unconformity. The formation reaches a total sedimentary thickness of more than . The formation ranges in age from the late Middle Jurassic to the Early Cretaceous, Oxfordian to Hauterivian stages, with the base of the formation possibly extending into the Callovian. The Tendaguru Formation is subdivided into six members; from oldest to youngest Lower Dinosaur Member, the ''Nerinella'' Member, the Middle Dinosaur Member, ''Indotrigonia africana'' Member, the Upper Dinosaur Member, and the ''Rutitrigonia bornhardti-schwarzi'' Member. The succession comprises a sequence of sandstones, shales, siltstones, conglomerates with minor oolitic limestones, deposited in an overall shallow marine to c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Angela Milner
Angela Cheryl Milner (3 October 1947 – 13 August 2021) was a British paleontologist who, in 1986 alongside Alan Charig, described the dinosaur '' Baryonyx''. Early life Milner was born Angela Girven in Gosforth, daughter of Cyril and Lucia Girven. Her father was the county engineer for Northumberland. She attended Church High school. She initially planned to focus on microbiology for her university degree, but inspiring lectures from Alec Panchen made her change to palaeontology. She gained a BSc in zoology at Newcastle University and stayed there in 1969 to take a PhD in palaeontology supervised by Panchen focusing on the nectrideans, a group of Paleozoic tetrapods. Career Milner was first employed at the Natural History Museum in London in 1976. Her unusual career path led her to reach a management as well as scientific role, finally being promoted to Assistant Keeper of Palaeontology as well as being a senior scientist. She was Head of the Fossil Vertebrates D ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lindi Region
Lindi Region (''Mkoa wa Lindi'' in Swahili) is one of Tanzania's 31 administrative regions. The region covers an area of . The region is comparable in size to the combined land area of the nation state of Sri Lanka. The regional capital is the municipality of Lindi. The Lindi Region borders on Pwani Region, Morogoro Region, Ruvuma Region, and Mtwara Region. The name Lindi is an old Swahili word meaning "hiding pits", a place where Swahili people will hide to defend themselves from hostile invasions. The region is home to two UNESCO World Heritage Sites, namely; Kilwa Kisiwani and Selous Game Reserve. According to the 2012 national census, the region had a population of 864,652, which was lower than the pre-census projection of 960,236. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Late Jurassic
The Late Jurassic is the third epoch of the Jurassic Period, and it spans the geologic time from 163.5 ± 1.0 to 145.0 ± 0.8 million years ago (Ma), which is preserved in Upper Jurassic strata.Owen 1987. In European lithostratigraphy, the name "Malm" indicates rocks of Late Jurassic age. In the past, ''Malm'' was also used to indicate the unit of geological time, but this usage is now discouraged to make a clear distinction between lithostratigraphic and geochronologic/chronostratigraphic units. Subdivisions The Late Jurassic is divided into three ages, which correspond with the three (faunal) stages of Upper Jurassic rock: Paleogeography During the Late Jurassic Epoch, Pangaea broke up into two supercontinents, Laurasia to the north, and Gondwana to the south. The result of this break-up was the spawning of the Atlantic Ocean. However, at this time, the Atlantic Ocean was relatively narrow. Life forms of the epoch This epoch is well known for many famous types of din ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tithonian
In the geological timescale, the Tithonian is the latest age of the Late Jurassic Epoch and the uppermost stage of the Upper Jurassic Series. It spans the time between 152.1 ± 4 Ma and 145.0 ± 4 Ma (million years ago). It is preceded by the Kimmeridgian and followed by the Berriasian (part of the Cretaceous).See for a detailed version of the geologic timescale Gradstein ''et al.'' (2004) Stratigraphic definitions The Tithonian was introduced in scientific literature by German stratigrapher Albert Oppel in 1865. The name Tithonian is unusual in geological stage names because it is derived from Greek mythology. Tithonus was the son of Laomedon of Troy and fell in love with Eos, the Greek goddess of dawn. His name was chosen by Albert Oppel for this stratigraphical stage because the Tithonian finds itself hand in hand with the dawn of the Cretaceous. The base of the Tithonian stage is at the base of the ammonite biozone of '' Hybonoticeras hybonotum''. A global refer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Faunal Stage
In chronostratigraphy, a stage is a succession of rock strata laid down in a single age on the geologic timescale, which usually represents millions of years of deposition. A given stage of rock and the corresponding age of time will by convention have the same name, and the same boundaries. Rock series are divided into stages, just as geological epochs are divided into ages. Stages can be divided into smaller stratigraphic units called chronozones. (See chart at right for full terminology hierarchy.) Stages may also be divided into substages or indeed grouped as superstages. The term faunal stage is sometimes used, referring to the fact that the same fauna (animals) are found throughout the layer (by definition). Definition Stages are primarily defined by a consistent set of fossils (biostratigraphy) or a consistent magnetic polarity (see paleomagnetism) in the rock. Usually one or more index fossils that are common, found worldwide, easily recognized, and limited to a s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Million Years Ago
The abbreviation Myr, "million years", is a unit of a quantity of (i.e. ) years, or 31.556926 teraseconds. Usage Myr (million years) is in common use in fields such as Earth science and cosmology. Myr is also used with Mya (million years ago). Together they make a reference system, one to a quantity, the other to a particular place in a year numbering system that is ''time before the present''. Myr is deprecated in geology, but in astronomy ''Myr'' is standard. Where "myr" ''is'' seen in geology it is usually "Myr" (a unit of mega-years). In astronomy it is usually "Myr" (Million years). Debate In geology a debate remains open concerning the use of ''Myr'' (duration) plus ''Ma'' (million years ago) versus using only the term ''Ma''. In either case the term '' Ma'' is used in geology literature conforming to ISO 31-1 (now ISO 80000-3) and NIST 811 recommended practices. Traditional style geology literature is written The "ago" is implied, so that any such year number "X M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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