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Lusitanisuchus
''Lusitanisuchus'' is an extinct genus of mesoeucrocodylian crocodylomorph. Mostly fragmentary fossils have been found from several localities in Portugal and are Late Jurassic and Early Cretaceous in age. The only species, ''Lusitanisuchus mitracostatus'', was named in 2004 after having previously been described as a species of the genus '' Lisboasaurus'' in 1970. ''L. mitracostatus'' was originally thought to have been an anguimorph lizard upon its naming in 1970 based on fragmentary jaw remains and isolated teeth found from the Kimmeridgean-age Guimarota Formation in Leiria . The species was later regarded as a ''nomen dubium'' by several authors of papers regarding ''Lisboasaurus'' due to the incomplete nature of the known remains associated with the species. However, a later reexamination of fossils from the Guimarota Formation had found skull material that included a dentary similar to the one seen in the holotype of ''L. mitracostatus''. These remains, being more comple ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lisboasaurus
''Lisboasaurus'' is a small (400 mm length) genus of Mesozoic crocodylomorph that lived in fresh water. It is known from fossilized tooth and jaw fragments of Late Jurassic and Early Cretaceous age. Two species have been described. In the past ''Lisboasaurus'' has been interpreted as an avialan, troodontid, or an anguimorph lizard. Both species are currently assigned to Crocodylomorpha, one is reassigned to the genus ''Lusitanisuchus''. Discovery and naming In the 1960s paleontologists From the Free University Berlin located new vertebrate fossil sites that included the lignite mines of Guimarota, near the town of Leiria, Portugal. These lignites are dated by Milner and Evans, 1991, between Bathonian (middle Jurassic) to Oxfordian (early Late Jurassic) age. Schwarz and Fechner, 2004, date them as Late Jurassic. Seiffert, (1970, 1973), described ''Lisboasaurus'' as a genus of anguimorph lepidosaur comprising two species, ''L. estesi'' and ''L. mitracostatus''. He subdivi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mesoeucrocodylia
Mesoeucrocodylia is the clade that includes Eusuchia and crocodyliforms formerly placed in the paraphyletic group Mesosuchia. The group appeared during the Early Jurassic, and continues to the present day. Diagnosis It was long known that Mesosuchia was an evolutionary grade, a hypothesis confirmed by the phylogenetic analysis of Benton and Clark (1988) which demonstrated that Eusuchia (which includes all living crocodylian species) was nested within Mesosuchia. Due to the paraphyly of Mesosuchia, Mesoeucrocodylia was erected to replace Mesosuchia. Several anatomical characteristics differentiate Mesoeucrocodylia from the other crocodylomorph clades. The frontal bones of the skull are fused together into a single compound element, for example. Mesoeucrocodylians possess something of a secondary palate, formed by the posterior extension of sutured palatine bones. The otic aperture of the members of this clade is blocked posteriorly by the squamosal bone. Classification Ph ... [...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 dinosau ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ornithopoda
Ornithopoda () is a clade of ornithischian dinosaurs, called ornithopods (), that started out as small, bipedal running grazers and grew in size and numbers until they became one of the most successful groups of herbivores in the Cretaceous world, dominating the North American land. Their major evolutionary advantage was the progressive development of a chewing apparatus that became the most sophisticated ever developed by a non-avian dinosaur, rivaling that of modern mammals such as the domestic cow. They reached their apex of diversity and ecological dominance in the hadrosaurids (colloquially known as 'duck-bills'), before they were wiped out by the Cretaceous–Paleogene extinction event along with all other non-avian dinosaurs. Members are known from all seven continents, though they are generally rare in the Southern Hemisphere. History of research In 1870, Thomas Henry Huxley listed Iguanodontidae (coined by Cope a year earlier) as one of his three families of dinosaurs ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stokesosaurus
''Stokesosaurus'' (meaning "Stokes' lizard") is a genus of small (around in length), carnivorous early tyrannosauroid theropod dinosaurs from the late Jurassic period of Utah, United States. History From 1960 onwards Utah geologist William Lee Stokes and his assistant James Henry Madsen excavated thousands of disarticulated ''Allosaurus'' bones at the Cleveland-Lloyd Dinosaur Quarry in Emery County, Utah. During the early 1970s, Madsen began to catalogue these finds in detail, discovering that some remains represented species new to science. In 1974 Madsen named and described the type species ''Stokesosaurus clevelandi''. Its generic name honours Stokes. The specific name refers to the town of Cleveland, Utah. The holotype ( UMNH 2938, also known as UMNH VP 7473 and formerly known as UUVP 2938) was uncovered in the Brushy Basin Member of the Morrison Formation dating from the early Tithonian stage, about 150 million years old. It consists of a left ilium or hip bone, bel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aviatyrannis
''Aviatyrannis'' is a genus of carnivorous tyrannosauroid theropod dinosaur from the Oxfordian-Tithonian stages of the Late Jurassic found in Portugal. Discovery and naming In 2000 Oliver Walter Mischa Rauhut reported the find of tyrannosauroid material in the lignite coal mine of Guimarota near Leiria, which he referred to ''Stokesosaurus''. Later concluding the distinctiveness of the material justified a separate genus, Rauhut in 2003 named and described it as the type species ''Aviatyrannis jurassica''. The species name was by Rauhut given the intended meaning of "tyrant's grandmother from the Jurassic". The generic name is derived from Latin ''avia'', "grandmother", and ''tyrannus'', "tyrant", on the presumption ''tyrannis'' would be its genitive. The specific name means "Jurassic". The holotype, IPFUB Gui Th 1, was found in a layer of the Alcobaça Formation dating from the early Kimmeridgian, about 155 million years old. It consists of a right ilium. Rauhut in 2003 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tyrannosauroidea
Tyrannosauroidea (meaning 'tyrant lizard forms') is a superfamily (or clade) of coelurosaurian theropod dinosaurs that includes the family Tyrannosauridae as well as more basal relatives. Tyrannosauroids lived on the Laurasian supercontinent beginning in the Jurassic Period. By the end of the Cretaceous Period, tyrannosauroids were the dominant large predators in the Northern Hemisphere, culminating in the gigantic ''Tyrannosaurus''. Fossils of tyrannosauroids have been recovered on what are now the continents of North America, Europe and Asia, with fragmentary remains possibly attributable to tyrannosaurs also known from South America and Australia. Tyrannosauroids were bipedal carnivores, as were most theropods, and were characterized by numerous synapomorphy, skeletal features, especially of the skull and pelvis. Early in their existence, tyrannosauroids were small predators with long, three-fingered forelimbs. Late Cretaceous genera became much larger, including some of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alcobaça Formation
The Alcobaça Formation, previously known as the Guimarota Formation and also known as the Consolação Unit, is a geological formation in Portugal. It dates back to the Kimmeridgian stage of the Late Jurassic. It is an important source of information on the diversity of Late Jurassic mammals. Many of the fossils were collected from the now disused and flooded Camadas de Guimarota coal mine. Vertebrate paleofauna Dinosaur eggs are geographically located in Lisbon District, Portugal. Dinosaur tracks are geographically located in Leiria District, Portugal. Amphibians Ornithischians Indeterminate euornithopod remains located in Lisbon District. Indeterminate stegosaurid remains present in Lisbon District. Saurischians Indeterminate sauropod remains located in Leiria and Lisboa."16.1 Distrito do Leiria, Portugal; 3. Camadas de Alcobaça," and "16.4 Distrito do Lisboa, Portugal; 1. Camadas de Alcobaça," in Weishampel, et al. (2004). Pages 548-549. Turtles Lepidos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Berriasian
In the geological timescale, the Berriasian is an age/stage of the Early/Lower Cretaceous. It is the oldest subdivision in the entire Cretaceous. It has been taken to span the time between 145.0 ± 4.0 Ma and 139.8 ± 3.0 Ma (million years ago). The Berriasian succeeds the Tithonian (part of the Jurassic) and precedes the Valanginian. Stratigraphic definition The Berriasian Stage was introduced in scientific literature by Henri Coquand in 1869. It is named after the village of Berrias in the Ardèche department of France. The largely non-marine English Purbeck Formation is in part of Berriasian age.In fact, the first rocks to be described of this age were the beds of the English Purbeck Formation, named as the Purbeckian by Alexandre Brongniart in 1829 following description by Henry De la Beche, William Buckland, Thomas Webster and William Henry Fitton. The base of the Berriasian, which is also the base of the Cretaceous System, has traditionally been placed at the first ap ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lourinhã
Lourinhã () is a municipality in the District of Lisbon, in the Oeste Subregion of Portugal. The population in 2011 was 25,735, in an area of 147.17 km². The seat of the municipality is the town of Lourinhã, with a population of 8,800 inhabitants. The present Mayor is João Duarte, elected by the Socialist Party. History The name Lourinhã possibly originated in the period of Roman domination, when a villa was located in the area. The origin of the medieval village is linked to ''Jordan'', a French knight who took part in the successful Siege of Lisbon in 1147. King Afonso Henriques granted Jordan the region of Lourinhã as fief and allowed him to grant a foral (letter of feudal rights) to its settlers in 1160. The name Lourinhã may be related to the origin of its feudal lord, since Jordan was from the Loire region in France. The rights of Lourinhã were confirmed by letters of King Sancho I in 1218 and again by Afonso III in 1258. The parish of Lourinhã became one ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Porto Dinheiro
Porto Dinheiro (or Praia de Porto Dinheiro) is a locality in the civil parish (''freguesia'') of Ribamar, municipality of Lourinhã, in Portugal. It is known as a rich fossil locality, from where were found many Late Jurassic dinosaurs and mammals. A few even received the locality name, like the ''Dinheirosaurus lourinhanensis'' and Jurassic mammals like ''Portopinheirodon asymmetricus'' and the multituberculates family Pinheirodontidae. The second one is the based for a new family of mammals, the Pinheirodontidae. An diverse ichnofaunaMateus, O., & Milàn, J. (2009). A diverse Upper Jurassic dinosaur ichnofauna from central‐west Portugal. Lethaia, 43(2), 245-257. is known in that site. This locality was once considered to be early Cretaceous in age, but it is 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
