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Machairodus Aphanistus
''Machairodus'' (from , 'knife' and 'tooth') is a genus of large machairodont or ''saber-toothed cat'' that lived in Africa and Eurasia during the Middle to Late Miocene, from 12.5 million to 8.7 million years ago. It is the animal from which the subfamily Machairodontinae gets its name. The type species of the genus, ''M. aphanistus'', was comparable to tigers in size making it an apex predator of the ecosystems it inhabited. It is currently usually placed as one of the most basal members of the tribe Homotherini, and the ancestor of later members of the tribe. History of research and taxonomy ''Machairodus'' was first named in 1832, by German Naturalist Johann Jakob Kaup. Though its remains had been known since 1824, it was believed by Georges Cuvier that the fossils had come from a species of bear, which he called ''Ursus cultridens'' (known today as ''Megantereon'') based on composite sample of teeth from different countries, species and geologic ages, leading to what wou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Homotherini
Homotherini (Machairodontini) is a tribe (or subtribe) of saber-toothed cats of the family Felidae (true cats). The tribe is commonly known as scimitar-toothed cats. These saber-toothed cats were endemic to North America, Europe, Asia, Africa, and South America from the Miocene to Pleistocene living from c. 10 Ma until c. 12,000 years ago. The evolutionary relationship between the tribes Homotherini and Machairodontini cause paleontologists to classify Homotherini either as a subtribe of Machairodontini, or the same tribe often using either name interchangeably. Description Compared to the usually massively built dirk-toothed phenotype, apparent in ''Smilodon'', ''Megantereon'' and the feliform '' Barbourofelis'' (just to list a few), their upper canines were smaller than those of equally sized cats of that phenotype, but they had serrated edges. The scimitar-toothed phenotype has also evolved independently in other mammal families. The subtribe Homotherini evolved towards a b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Middle Miocene
The Middle Miocene is a sub-epoch of the Miocene epoch (geology), epoch made up of two Stage (stratigraphy), stages: the Langhian and Serravallian stages. The Middle Miocene is preceded by the Early Miocene. The sub-epoch lasted from 15.97 ± 0.05 Ma (million years ago) to 11.608 ± 0.005 Ma. During this period, a sharp drop in global temperatures took place. This event is known as the Middle Miocene disruption, Middle Miocene Climatic Transition. For the purpose of establishing European land mammal ages, this sub-epoch is equivalent to the Astaracian age. References External links GeoWhen Database - Middle Miocene Miocene, .02 Miocene geochronology, 02 Langhian, * Serravallian, * {{geochronology-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paramachairodus
''Paramachaerodus'' is an extinct genus of saber-tooth cat of the subfamily Machairodontinae, which was endemic to Eurasia during the Middle and Late Miocene from 15 to 9 Ma. A 2022 phylogenetic analysis suggested that the genus may be polyphyletic. ''Paramacherodus'' is one of the earliest known true saber-toothed cats. Many fossils were discovered in Cerro de los Batallones, a Late Miocene fossil site near Madrid, Spain. One leopard-sized species is known, ''Paramachaerodus orientalis'' from the Turolian. A second species, ''Paramacharodus maximiliani'', has been considered a synonym of ''Paramachaerodus orientalis'' by some authors, but was considered a valid species in the most recent systematic revision. That revision, based on an extensive morphological analysis, also determined that the species ''P. ogygia'' exhibited less derived sabertooth features than the other ''Paramachaerodus'' species and should be assigned to a separate genus, '' Promegantereon''. Description T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Miocene
The Miocene ( ) is the first epoch (geology), geological epoch of the Neogene Period and extends from about (Ma). The Miocene was named by Scottish geologist Charles Lyell; the name comes from the Greek words (', "less") and (', "new") and means "less recent" because it has 18% fewer modern marine invertebrates than the Pliocene has. The Miocene followed the Oligocene and preceded the Pliocene. As Earth went from the Oligocene through the Miocene and into the Pliocene, the climate slowly cooled towards a series of ice ages. The Miocene boundaries are not marked by distinct global events but by regionally defined transitions from the warmer Oligocene to the cooler Pliocene Epoch. During the Early Miocene, Afro-Arabia collided with Eurasia, severing the connection between the Mediterranean and Indian Oceans, and allowing the interchange of fauna between Eurasia and Africa, including the dispersal of proboscideans and Ape, hominoids into Eurasia. During the late Miocene, the conn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mediterranean
The Mediterranean Sea ( ) is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean basin and almost completely enclosed by land: on the east by the Levant in West Asia, on the north by Anatolia in West Asia and Southern Europe, on the south by North Africa, and on the west almost by the Morocco–Spain border. The Mediterranean Sea covers an area of about , representing 0.7% of the global ocean surface, but its connection to the Atlantic via the Strait of Gibraltar—the narrow strait that connects the Atlantic Ocean to the Mediterranean Sea and separates the Iberian Peninsula in Europe from Morocco in Africa—is only wide. Geological evidence indicates that around 5.9 million years ago, the Mediterranean was cut off from the Atlantic and was partly or completely desiccated over a period of some 600,000 years during the Messinian salinity crisis before being refilled by the Zanclean flood about 5.3 million years ago. The sea was an important rout ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Machairodus Aphanistus - Cerro De Los Batallones - Museo Arqueológico Regional CAM
''Machairodus'' (from , 'knife' and 'tooth') is a genus of large machairodont or ''saber-toothed cat'' that lived in Africa and Eurasia during the Middle to Late Miocene, from 12.5 million to 8.7 million years ago. It is the animal from which the subfamily Machairodontinae gets its name. The type species of the genus, ''M. aphanistus'', was comparable to tigers in size making it an apex predator of the ecosystems it inhabited. It is currently usually placed as one of the most basal members of the tribe Homotherini, and the ancestor of later members of the tribe. History of research and taxonomy ''Machairodus'' was first named in 1832, by German Naturalist Johann Jakob Kaup. Though its remains had been known since 1824, it was believed by Georges Cuvier that the fossils had come from a species of bear, which he called ''Ursus cultridens'' (known today as ''Megantereon'') based on composite sample of teeth from different countries, species and geologic ages, leading to what woul ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tunisia
Tunisia, officially the Republic of Tunisia, is a country in the Maghreb region of North Africa. It is bordered by Algeria to the west and southwest, Libya to the southeast, and the Mediterranean Sea to the north and east. Tunisia also shares maritime borders with Italy through the islands of Sicily and Sardinia to the north and Malta to the east. It features the archaeological sites of Carthage dating back to the 9th century BC, as well as the Great Mosque of Kairouan. Known for its ancient architecture, Souks of Tunis, souks, and blue coasts, it covers , and has a population of 12.1 million. It contains the eastern end of the Atlas Mountains and the northern reaches of the Sahara desert; much of its remaining territory is arable land. Its of coastline includes the African conjunction of the western and eastern parts of the Mediterranean Basin. Tunisia is home to Africa's northernmost point, Cape Angela. Located on the northeastern coast, Tunis is the capital and List of cities ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Year
A year is a unit of time based on how long it takes the Earth to orbit the Sun. In scientific use, the tropical year (approximately 365 Synodic day, solar days, 5 hours, 48 minutes, 45 seconds) and the sidereal year (about 20 minutes longer) are more exact. The modern calendar year, as reckoned according to the Gregorian calendar, approximates the tropical year by using a system of leap years. The term 'year' is also used to indicate other periods of roughly similar duration, such as the lunar year (a roughly 354-day cycle of twelve of the Moon's phasessee lunar calendar), as well as periods loosely associated with the calendar or astronomical year, such as the seasonal year, the fiscal year, the academic year, etc. Due to the Earth's axial tilt, the course of a year sees the passing of the seasons, marked by changes in weather, the hours of daylight, and, consequently, vegetation and soil fertility. In temperate and subpolar climate, subpolar regions around the planet, four ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Evolutionary Grade
A grade is a taxon united by a level of morphological or physiological complexity. The term was coined by British biologist Julian Huxley, to contrast with clade, a strictly phylogenetic unit. Phylogenetics The concept of evolutionary grades arises in the context of phylogenetics: the study of the evolutionary history and relationships among or within groups of organisms. These relationships are determined by phylogenetic inference methods that focus on observed heritable traits, such as DNA sequences, protein amino acid sequences, or morphology. The result of such an analysis is a phylogenetic tree—a diagram containing a hypothesis of relationships that reflects the evolutionary history of a group of organisms. Definition of an evolutionary grade An evolutionary grade is a group of species united by morphological or physiological traits, that has given rise to another group that has major differences from the ancestral group's condition, and is thus not considered p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paraphyly
Paraphyly is a taxonomic term describing a grouping that consists of the grouping's last common ancestor and some but not all of its descendant lineages. The grouping is said to be paraphyletic ''with respect to'' the excluded subgroups. In contrast, a monophyletic grouping (a clade) includes a common ancestor and ''all'' of its descendants. The terms are commonly used in phylogenetics (a subfield of biology) and in the tree model of historical linguistics. Paraphyletic groups are identified by a combination of synapomorphies and symplesiomorphies. If many subgroups are missing from the named group, it is said to be polyparaphyletic. The term received currency during the debates of the 1960s and 1970s accompanying the rise of cladistics, having been coined by zoologist Willi Hennig to apply to well-known taxa like Reptilia (reptiles), which is paraphyletic with respect to birds. Reptilia contains the last common ancestor of reptiles and all descendants of that ancest ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Columbia University Press
Columbia University Press is a university press based in New York City New York, often called New York City (NYC), is the most populous city in the United States, located at the southern tip of New York State on one of the world's largest natural harbors. The city comprises five boroughs, each coextensive w ..., and affiliated with Columbia University. Founded in 1893, it is currently directed by Jennifer Crewe (2014–present) and publishes titles in the humanities and sciences, including the fields of literary and cultural studies, history, social work, sociology, religion, film, and international studies. History Columbia University Press was founded in May 1893. In 1933, the first four volumes of the ''History of the State of New York'' were published. In the early 1940s, the Press' revenues rose, partially thanks to the ''Encyclopedia'' and the government's purchase of 12,500 copies for use by the military. Columbia University Press is notable for publishing r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cerro De Los Batallones
Cerro is Spanish for "hill" or "mountain". People * Francisco Cerro (born 1988), Argentine footballer * Francisco Cerro Chaves (born 1957), Spanish prelate, theologian, and philosopher of the Catholic Church * Ian Cerro (born 1996), American footballer * Isma Cerro (born 1995), Spanish footballer * Mariana Cerro (born 2000), Spanish footballer * Rafael Cerro (born 1997), Colombian weightlifter * Rafael Cerro (born 1993), Spanish bullfighter * Samuele Cerro (born 1995), Italian triple jumper * Luis del Cerro (1924–2019), Spanish sport shooter, Olympian * María Del Cerro (born 1985), Argentine model, actress, television presenter and fashion designer * Saúl del Cerro (born 2004), Spanish footballer * Luis Miguel Sánchez Cerro (1889–1933), Peruvian army officer and President of Peru Toponyms ;Argentina: * Cerro Ameghino, Mendoza Province * Cerro Archibarca, Salta Province *Cerro Arco, Mendoza Province * Cerro Azul, Misiones * Cerro Bandera Formation, Neuquén Pro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
