Johann Friedrich von Brandt
Johann Friedrich von Brandt was a German naturalist, who worked in Russia. Brandt was educated at a gymnasium in Wittenberg and the University of Berlin. In 1831 he emigrated to Russia, soon was appointed director of the Zoological Museum of the St Petersburg Academy of Sciences. Brandt encouraged the collection of native animals, many of which were not represented in the museum. Many specimens began to arrive from the expeditions of Severtzov, Middendorff and Gustav Radde, he described several birds collected by Russian explorers off the Pacific Coast of North America, including Brandt's cormorant, red-legged kittiwake and spectacled eider. As a paleontologist, Brandt ranks among the best, he was an entomologist, specialising in Coleoptera and Diplopoda. He died in Governorate of Estonia, he is commemorated in Brandt's bat, Brandt's hedgehog, three other species of mammals, the lizard Iranolacerta brandtii. In addition, Johann Friedrich von Brandt concerned the continuation of the work Getreue Darstellung und Beschreibung der in der Arzneykunde gebräuchlichen Gewächse of Friedrich Gottlob Hayne.
Flora Berolinensis, sive descriptio plantarum phanerogamarum circa Berolinum sponte crescentium vel in agris cultarum additis filicibus et charis Deutschlands phanerogamische Giftgewächse Tabellar Uebersichi d. offizin. Gewächse nach d. Linn. Sexualsystem u. d. natürl. System Medizinische Zoologie oder getreue Darstellung und Beschreibung der Thiere die in der Arzneimlttellehre in Betracht Kommen, 2 vols. Written with J. T. C. Ratzeburt Uebersicht d. Charactere d. Familien d. offizin. Gewächse nach R. Brown, De Candolle, Jussieu,… Deutschlands kryptogamische Giftgewächse Deutschlands phanerogamische Geftgewächse as Abbildung und Beschreibung der in Deutschland wild wachsenden und in Gärten in freien ausdauernden Giftgewächse, nach natürlichen Familien erläutert, mit Beiträgen von P. Phoebus und J. T. C. Ratzeburg Symbolae Sirenologicae quibus praecipue Rhutinae historia naturalis illustratur Symbolae Sirenologicae…, fasc. 2 and 3 Mémoires de l’Académie impériale des sciences, St. Pétersbourg, 7th ser.
12, no. 1. Fuchs, ibid. 20, no. 1 Ergänzungen, ibid. 21, no. 6 Bericht über die Fortschritte, welche die zoologischen Wissenschaften den von der kaiserlichen Akademie der Wissenschaften zu St. Petersburg von 1831 bis 1879 herausgegeben Schriften verdanken J. F. Brandtii index operum omnium, issued as a Festschrift. Getreue Darstellung und Beschreibung der in der Arzneykunde gebräuchlichen Gewächse wie auch solcher, welche mit ihnen verwechselt werden können. 12 Volumes, 1805–1856. Digital Edition by the University and State Library Düsseldorf Abbildung und Beschreibung der in Deutschland wild wachsenden und in Gärten im Freien ausdauernden Giftgewächse nach natürlichen Familien erläutert. Band 1: Phanerogamen Hirschwald, Berlin 1834 Digital edition by the University and State Library Düsseldorf Abbildung und Beschreibung der in Deutschland wild wachsenden und in Gärten im Freien ausdauernden Giftgewächse nach natürlichen Familien erläutert. Band 2: Kryptogamen Hirschwald, Berlin 1838 Digital edition by the University and State Library Düsseldorf Untersuchungen über die fossilen und subfossilen cetaceen Europa's.
Mémoires de L'Académie Impériale des Sciences de Saint-Petersbourg, Series 7 20:1-372 1873 Hemisyntrachelus Acipenser baerii Brandt, 1869 Acipenser guldenstadti Brandt & Ratzeburg, 1833 Acipenser schrenckii Brandt, 1869 Chrysaora Fuscescens Brandt, 1835 Emberiza bruniceps Brandt, 1841 Emberiza cioides Brandt, 1843 Holothuria leucospilota Brandt, 1835 Idotea ochotensis Brandt, 1851 Lasiopodomys brandtii Ligia dilatata Brandt, 1833 Metridium farcimen Brandt, 1835 Mesocricetus brandti Myotis brandtii Eversmann, 1845 Paraechinus hypomelas Phalacrocorax penicillatus Porphyrophora hamelii Brandt, 1833 Somateria fischeri Brandt, 1847 Stichopus chloronotus Brandt, 1835 Trionyx maackii Brandt, 1858 Anonym 1877 Das fünfzigjährige Doktorjubiläum des Akademikers Geheimrat Johann Friedrich Brandt am 12. Januar 1876. St. Petersburg. Anonym 1879 Botan. Ztg. 37 743 Anonym 1879: Naturaliste Canad. 1 111 Anonym 1879: Zool. Anz. 2 480 Medvedev, G. S. 2000 Trudy Russk. Ent. Obsc. 71 6-22, Portr. Ratzeburg, J. T. C. 1874 Forstwissenschaftliches Schriftsteller-Lexikon.
Berlin, Nicolai'sche Buchhandlung: X+1-516 72-76 Strauch, A. 1889 Das zoologische Museum der Kaiserlichen Akademie der Wissenschaften zu St. Petersburg in seinem fünfzigjährigen Bestehen. Works by Johann Friedrich von Brandt at Project Gutenberg Works by or about Johann Friedrich von Brandt at Internet Archive Brandt J. F. scanned books. Brandt, Johann Friedrich in Complete Dictionary of Scientific Biography
Jalisco the Free and Sovereign State of Jalisco, is one of the 31 states which, with Mexico City, comprise the 32 Federal Entities of Mexico. It is located in Western Mexico and is bordered by six states which are Nayarit, Aguascalientes, Michoacán and Colima. Jalisco is divided into 125 municipalities, its capital city is Guadalajara. Jalisco is one of the most important states in Mexico because of its natural resources as well as its history. Many of the characteristic traits of Mexican culture outside Mexico City, are from Jalisco, such as mariachi, ranchera music, tequila, etc. hence the state's motto: "Jalisco es México." Economically, it is ranked third in the country, with industries centered in the Guadalajara metropolitan area, the second largest metropolitan area in Mexico. The state is home to two significant indigenous the Huichols and the Nahuas. There is a significant foreign population retirees from the United States and Canada, living in the Lake Chapala and Puerto Vallarta areas.
With a total area of 78,599 square kilometers, Jalisco is the seventh-largest state in Mexico, accounting for 4.1% of the country's territory. The state is in the central western coast of the country, bordering the states of Nayarit, Aguascalientes, Guanajuato and Michoacán with 342 kilometers of coastline on the Pacific Ocean to the west. Jalisco is made up of a diverse terrain that includes forests, beaches and lakes. Altitudes in the state vary from 0 to 4,300 meters above sea level, from the coast to the top of the Nevado de Colima; the Jalisco area contains all five of Mexico's natural ecosystems: arid and semi arid scrublands, tropical evergreen forests, tropical deciduous and thorn forests and mesquite grasslands and temperate forests with oaks and firs. Over 52% of the bird species found in Mexico live in the state, with 525, 40% of Mexico's mammals with 173 and 18% of its reptile species. There are 7,500 species of veined plants. One reason for its biodiversity is, lies in the transition area between the temperate north and tropical south.
It lies at the northern edge of the Sierra Madre del Sur and is on the Trans-Mexican Volcanic Belt, which provides a wide variety of ecological conditions from tropical rainforest conditions to semi arid areas to areas apt for conifer forests. Its five natural regions are: Northwestern Plains and Sierras, Sierra Madre Occidental, Central Plateau, Trans-Mexican Volcanic Belt, which covers most of the state, the Sierra Madre del Sur, it has an average altitude of 1,550 meters MASL, but ranges from 0–4,300 m. Most of the territory is semi-flat between 600–2,050 m, followed by rugged terrain of between 900–4,300 m and a small percentage of flat lands between 0–1,750 m. Principle elevations include the Nevado de Colima, the Volcan de Colima, the Sierra El Madroño, the Tequila Volcano, the Sierra Tapalpa, Sierra Los Huicholes, Sierra San Isidro, Sierra Manantlán, Cerro El Tigre, Cerro García, Sierra Lalo, Sierra Cacoma, Cerro Gordo, Sierra Verde and the Sierra Los Guajolotes. Jalisco's rivers and streams empty into the Pacific Ocean and are divided into three groups: the Lerma/Santiago River and its tributaries, rivers that empty directly into the Pacific and rivers in the south of the state.
Jalisco has several river basins with the most notable being that of the Lerma/Santiago River, which drains the northern and northeastern parts of the state. The Lerma River enters extends from the State of Mexico and empties into Lake Chapala on the east side. On the west, water flows out in the Santiago River, which crosses the center of Jalisco on its way to the Pacific, carving deep canyons in the land. Tributaries to the Santiago River include the Zula, the Verde River, the Juchipila and the Bolaños. About three quarters of the state's population lives near this river system. In the southwest of the state, there are a number of small rivers that empty directly into the Pacific Ocean; the most important of these is the Ameca, with its one main tributary, the Mascota River. This river empties into the Ipala Bay; the Tomatlán, San Nicolás, Purificación, Marabasco-Minatitlán, Tuxcacuesco, Armería and Tuxpan rivers flow perpendicular to the Pacific Ocean and drain the coastal area. Another river of this group is the Cihuatlán River, which forms the boundary between Jalisco and Colima emptying into the Barra de Navidad Bay.
The southeastern corner belongs to the Balsas River basin. This includes the Tuxcacuesco, which join to form the Armería and the Tuxpan; the other main surface water is Lake Chapala, is the largest and most important freshwater lake in Mexico, accounting for about half of the country's lake surface. The lake acts as a regulator of the flow of both the Santiago Rivers. There are a number of seasonal and salty lakes linking to form the Zacoalco-Sayula land-locked system. There are other smaller lakes called Cajititlán, San Marcos, Atotonilco. Dams include Santa Rosa, La Vega, Tacotán and Las Piedras. Jalisco's surface water accounts for fifteen percent of the surface freshwater in Mexico. In 1987, four beaches in Jalisco were designated as federal marine turtle sanctuaries: El Tecuán, Cuitzmala and Playón de Mismaloya, with an extension of 8 km. Playa Majahuitas is 27 km southwest of Puerto Vallarta with a rugged coastline, numerous inlets and outcroppings; the Cañon Submarino underwater canyon is located offs
Birds known as Aves, are a group of endothermic vertebrates, characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, a strong yet lightweight skeleton. Birds range in size from the 5 cm bee hummingbird to the 2.75 m ostrich. They rank as the world's most numerically-successful class of tetrapods, with ten thousand living species, more than half of these being passerines, sometimes known as perching birds. Birds have wings which are less developed depending on the species. Wings, which evolved from forelimbs, gave birds the ability to fly, although further evolution has led to the loss of flight in flightless birds, including ratites and diverse endemic island species of birds; the digestive and respiratory systems of birds are uniquely adapted for flight. Some bird species of aquatic environments seabirds and some waterbirds, have further evolved for swimming; the fossil record demonstrates that birds are modern feathered dinosaurs, having evolved from earlier feathered dinosaurs within the theropod group, which are traditionally placed within the saurischian dinosaurs.
The closest living relatives of birds are the crocodilians. Primitive bird-like dinosaurs that lie outside class Aves proper, in the broader group Avialae, have been found dating back to the mid-Jurassic period, around 170 million years ago. Many of these early "stem-birds", such as Archaeopteryx, were not yet capable of powered flight, many retained primitive characteristics like toothy jaws in place of beaks, long bony tails. DNA-based evidence finds that birds diversified around the time of the Cretaceous–Palaeogene extinction event 66 million years ago, which killed off the pterosaurs and all the non-avian dinosaur lineages, but birds those in the southern continents, survived this event and migrated to other parts of the world while diversifying during periods of global cooling. This makes them the sole surviving dinosaurs according to cladistics; some birds corvids and parrots, are among the most intelligent animals. Many species annually migrate great distances. Birds are social, communicating with visual signals and bird songs, participating in such social behaviours as cooperative breeding and hunting and mobbing of predators.
The vast majority of bird species are monogamous for one breeding season at a time, sometimes for years, but for life. Other species have breeding systems that are polygynous or polyandrous. Birds produce offspring by laying eggs, they are laid in a nest and incubated by the parents. Most birds have an extended period of parental care after hatching; some birds, such as hens, lay eggs when not fertilised, though unfertilised eggs do not produce offspring. Many species of birds are economically important as food for human consumption and raw material in manufacturing, with domesticated and undomesticated birds being important sources of eggs and feathers. Songbirds and other species are popular as pets. Guano is harvested for use as a fertiliser. Birds prominently figure throughout human culture. About 120–130 species have become extinct due to human activity since the 17th century, hundreds more before then. Human activity threatens about 1,200 bird species with extinction, though efforts are underway to protect them.
Recreational birdwatching is an important part of the ecotourism industry. The first classification of birds was developed by Francis Willughby and John Ray in their 1676 volume Ornithologiae. Carl Linnaeus modified that work in 1758 to devise the taxonomic classification system in use. Birds are categorised as the biological class Aves in Linnaean taxonomy. Phylogenetic taxonomy places Aves in the dinosaur clade Theropoda. Aves and a sister group, the clade Crocodilia, contain the only living representatives of the reptile clade Archosauria. During the late 1990s, Aves was most defined phylogenetically as all descendants of the most recent common ancestor of modern birds and Archaeopteryx lithographica. However, an earlier definition proposed by Jacques Gauthier gained wide currency in the 21st century, is used by many scientists including adherents of the Phylocode system. Gauthier defined Aves to include only the crown group of the set of modern birds; this was done by excluding most groups known only from fossils, assigning them, instead, to the Avialae, in part to avoid the uncertainties about the placement of Archaeopteryx in relation to animals traditionally thought of as theropod dinosaurs.
Gauthier identified four different definitions for the same biological name "Aves", a problem. Gauthier proposed to reserve the term Aves only for the crown group consisting of the last common ancestor of all living birds and all of its descendants, which corresponds to meaning number 4 below, he assigned other names to the other groups. Aves can mean all archosaurs closer to birds than to crocodiles Aves can mean those advanced archosaurs with feathers Aves can mean those feathered dinosaurs that fly Aves can mean the last common ancestor of all the living birds and all of its descendants (a "c
A chordate is an animal constituting the phylum Chordata. During some period of their life cycle, chordates possess a notochord, a dorsal nerve cord, pharyngeal slits, an endostyle, a post-anal tail: these five anatomical features define this phylum. Chordates are bilaterally symmetric; the Chordata and Ambulacraria together form the superphylum Deuterostomia. Chordates are divided into three subphyla: Vertebrata. There are extinct taxa such as the Vetulicolia. Hemichordata has been presented as a fourth chordate subphylum, but now is treated as a separate phylum: hemichordates and Echinodermata form the Ambulacraria, the sister phylum of the Chordates. Of the more than 65,000 living species of chordates, about half are bony fish that are members of the superclass Osteichthyes. Chordate fossils have been found from as early as the Cambrian explosion, 541 million years ago. Cladistically, vertebrates - chordates with the notochord replaced by a vertebral column during development - are considered to be a subgroup of the clade Craniata, which consists of chordates with a skull.
The Craniata and Tunicata compose the clade Olfactores. Chordates form a phylum of animals that are defined by having at some stage in their lives all of the following anatomical features: A notochord, a stiff rod of cartilage that extends along the inside of the body. Among the vertebrate sub-group of chordates the notochord develops into the spine, in wholly aquatic species this helps the animal to swim by flexing its tail. A dorsal neural tube. In fish and other vertebrates, this develops into the spinal cord, the main communications trunk of the nervous system. Pharyngeal slits; the pharynx is the part of the throat behind the mouth. In fish, the slits are modified to form gills, but in some other chordates they are part of a filter-feeding system that extracts particles of food from the water in which the animals live. Post-anal tail. A muscular tail that extends backwards behind the anus. An endostyle; this is a groove in the ventral wall of the pharynx. In filter-feeding species it produces mucus to gather food particles, which helps in transporting food to the esophagus.
It stores iodine, may be a precursor of the vertebrate thyroid gland. There are soft constraints that separate chordates from certain other biological lineages, but are not part of the formal definition: All chordates are deuterostomes; this means. All chordates are based on a bilateral body plan. All chordates are coelomates, have a fluid filled body cavity called a coelom with a complete lining called peritoneum derived from mesoderm; the following schema is from the third edition of Vertebrate Palaeontology. The invertebrate chordate classes are from Fishes of the World. While it is structured so as to reflect evolutionary relationships, it retains the traditional ranks used in Linnaean taxonomy. Phylum Chordata †Vetulicolia? Subphylum Cephalochordata – Class Leptocardii Clade Olfactores Subphylum Tunicata – Class Ascidiacea Class Thaliacea Class Appendicularia Class Sorberacea Subphylum Vertebrata Infraphylum incertae sedis Cyclostomata Superclass'Agnatha' paraphyletic Class Myxini Class Petromyzontida or Hyperoartia Class †Conodonta Class †Myllokunmingiida Class †Pteraspidomorphi Class †Thelodonti Class †Anaspida Class †Cephalaspidomorphi Infraphylum Gnathostomata Class †Placodermi Class Chondrichthyes Class †Acanthodii Superclass Osteichthyes Class Actinopterygii Class Sarcopterygii Superclass Tetrapoda Class Amphibia Class Sauropsida Class Synapsida Craniates, one of the three subdivisions of chordates, all have distinct skulls.
They include the hagfish. Michael J. Benton commented that "craniates are characterized by their heads, just as chordates, or all deuterostomes, are by their tails". Most craniates are vertebrates; these consist of a series of bony or cartilaginous cylindrical vertebrae with neural arches that protect the spinal cord, with projections that link the vertebrae. However hagfish have incomplete braincases and no vertebrae, are therefore not regarded as vertebrates, but as members of the craniates, the group from which vertebrates are thought to have evolved; however the cladistic exclusion of hagfish from the vertebrates is controversial, as they ma
Mexico the United Mexican States, is a country in the southern portion of North America. It is bordered to the north by the United States. Covering 2,000,000 square kilometres, the nation is the fifth largest country in the Americas by total area and the 13th largest independent state in the world. With an estimated population of over 120 million people, the country is the eleventh most populous state and the most populous Spanish-speaking state in the world, while being the second most populous nation in Latin America after Brazil. Mexico is a federation comprising 31 states and Mexico City, a special federal entity, the capital city and its most populous city. Other metropolises in the state include Guadalajara, Puebla, Tijuana and León. Pre-Columbian Mexico dates to about 8000 BC and is identified as one of five cradles of civilization and was home to many advanced Mesoamerican civilizations such as the Olmec, Teotihuacan, Zapotec and Aztec before first contact with Europeans. In 1521, the Spanish Empire conquered and colonized the territory from its politically powerful base in Mexico-Tenochtitlan, administered as the viceroyalty of New Spain.
Three centuries the territory became a nation state following its recognition in 1821 after the Mexican War of Independence. The post-independence period was tumultuous, characterized by economic inequality and many contrasting political changes; the Mexican–American War led to a territorial cession of the extant northern territories to the United States. The Pastry War, the Franco-Mexican War, a civil war, two empires, the Porfiriato occurred in the 19th century; the Porfiriato was ended by the start of the Mexican Revolution in 1910, which culminated with the promulgation of the 1917 Constitution and the emergence of the country's current political system as a federal, democratic republic. Mexico has the 11th largest by purchasing power parity; the Mexican economy is linked to those of its 1994 North American Free Trade Agreement partners the United States. In 1994, Mexico became the first Latin American member of the Organisation for Economic Co-operation and Development, it is classified as an upper-middle income country by the World Bank and a newly industrialized country by several analysts.
The country is considered both a regional power and a middle power, is identified as an emerging global power. Due to its rich culture and history, Mexico ranks first in the Americas and seventh in the world for number of UNESCO World Heritage Sites. Mexico is an ecologically megadiverse country, ranking fourth in the world for its biodiversity. Mexico receives a huge number of tourists every year: in 2018, it was the sixth most-visited country in the world, with 39 million international arrivals. Mexico is a member of the United Nations, the World Trade Organization, the G8+5, the G20, the Uniting for Consensus group of the UN, the Pacific Alliance trade bloc. Mēxihco is the Nahuatl term for the heartland of the Aztec Empire, namely the Valley of Mexico and surrounding territories, with its people being known as the Mexica, it is believed to be a toponym for the valley which became the primary ethnonym for the Aztec Triple Alliance as a result, although it could have been the other way around.
In the colonial era, back when Mexico was called New Spain this territory became the Intendency of Mexico and after New Spain achieved independence from the Spanish Empire it came to be known as the State of Mexico with the new country being named after its capital: the City of Mexico, which itself was founded in 1524 on top of the ancient Mexica capital of Mexico-Tenochtitlan. Traditionally, the name Tenochtitlan was thought to come from Nahuatl tetl and nōchtli and is thought to mean "Among the prickly pears rocks". However, one attestation in the late 16th-century manuscript known as "the Bancroft dialogues" suggests the second vowel was short, so that the true etymology remains uncertain; the suffix -co is the Nahuatl locative, making the word a place name. Beyond that, the etymology is uncertain, it has been suggested that it is derived from Mextli or Mēxihtli, a secret name for the god of war and patron of the Mexica, Huitzilopochtli, in which case Mēxihco means "place where Huitzilopochtli lives".
Another hypothesis suggests that Mēxihco derives from a portmanteau of the Nahuatl words for "moon" and navel. This meaning might refer to Tenochtitlan's position in the middle of Lake Texcoco; the system of interconnected lakes, of which Texcoco formed the center, had the form of a rabbit, which the Mesoamericans pareidolically associated with the moon rabbit. Still another hypothesis suggests that the word is derived from Mēctli, the name of the goddess of maguey; the name of the city-state was transliterated to Spanish as México with the phonetic value of the letter x in Medieval Spanish, which represented the voiceless postalveolar fricative. This sound, as well as the voiced postalveolar fricative, represented by a j, evolved into a voiceless velar fricative during the 16th century; this led to the use of the variant Méjico in many publications in Spanish, most notably in Spain, whereas in Mexico and most other Spanish–speaking countries, México was the preferred spelling. In recent years, the Real Academia Española, which regulates the Spanish l
In zoological nomenclature, a type species is the species name with which the name of a genus or subgenus is considered to be permanently taxonomically associated, i.e. the species that contains the biological type specimen. A similar concept is used for suprageneric groups called a type genus. In botanical nomenclature, these terms have no formal standing under the code of nomenclature, but are sometimes borrowed from zoological nomenclature. In botany, the type of a genus name is a specimen, the type of a species name; the species name that has that type can be referred to as the type of the genus name. Names of genus and family ranks, the various subdivisions of those ranks, some higher-rank names based on genus names, have such types. In bacteriology, a type species is assigned for each genus; every named genus or subgenus in zoology, whether or not recognized as valid, is theoretically associated with a type species. In practice, there is a backlog of untypified names defined in older publications when it was not required to specify a type.
A type species is both a concept and a practical system, used in the classification and nomenclature of animals. The "type species" represents the reference species and thus "definition" for a particular genus name. Whenever a taxon containing multiple species must be divided into more than one genus, the type species automatically assigns the name of the original taxon to one of the resulting new taxa, the one that includes the type species; the term "type species" is regulated in zoological nomenclature by article 42.3 of the International Code of Zoological Nomenclature, which defines a type species as the name-bearing type of the name of a genus or subgenus. In the Glossary, type species is defined as The nominal species, the name-bearing type of a nominal genus or subgenus; the type species permanently attaches a formal name to a genus by providing just one species within that genus to which the genus name is permanently linked. The species name in turn is fixed, to a type specimen. For example, the type species for the land snail genus Monacha is Helix cartusiana, the name under which the species was first described, known as Monacha cartusiana when placed in the genus Monacha.
That genus is placed within the family Hygromiidae. The type genus for that family is the genus Hygromia; the concept of the type species in zoology was introduced by Pierre André Latreille. The International Code of Zoological Nomenclature states that the original name of the type species should always be cited, it gives an example in Article 67.1. Astacus marinus Fabricius, 1775 was designated as the type species of the genus Homarus, thus giving it the name Homarus marinus. However, the type species of Homarus should always be cited using its original name, i.e. Astacus marinus Fabricius, 1775. Although the International Code of Nomenclature for algae and plants does not contain the same explicit statement, examples make it clear that the original name is used, so that the "type species" of a genus name need not have a name within that genus, thus in Article 10, Ex. 3, the type of the genus name Elodes is quoted as the type of the species name Hypericum aegypticum, not as the type of the species name Elodes aegyptica.
Glossary of scientific naming Genetypes – genetic sequence data from type specimens. Holotype Paratype Principle of Typification Type Type genus
National Autonomous University of Mexico
The National Autonomous University of Mexico is a public research university in Mexico. It ranks in world rankings based on the university's extensive research and innovation. UNAM's campus is a UNESCO World Heritage site, designed by some of Mexico's best-known architects of the 20th century. Murals in the main campus were painted by some of the most recognized artists in Mexican history, such as Diego Rivera and David Alfaro Siqueiros. In 2016, it had an acceptance rate of only 8%. UNAM generates a number of strong research publications and patents in diverse areas, such as robotics, computer science, physics, human-computer interaction, philosophy, among others. All Mexican Nobel laureates are either alumni or faculty of UNAM. UNAM was founded, in its modern form, on 22 September 1910 by Justo Sierra as a liberal alternative to its predecessor, the Royal and Pontifical University of Mexico. UNAM obtained its autonomy from the government in 1929; this has given the university the freedom to define its own curriculum and manage its own budget without interference from the government.
This has had a profound effect on academic life at the university, which some claim boosts academic freedom and independence. UNAM was the birthplace of the student movement of 1968, which turned into a nationwide rebellion against autocratic rule and began Mexico's three-decade journey toward democracy; the university was founded on 22 September 1910 by Justo Sierra Minister of Education in the Porfirio Díaz regime, who sought to create a different institution from its 19th-century precursor, the Royal and Pontifical University of Mexico, founded on 21 September 1551 by a royal decree signed by Crown Prince Phillip on behalf of Charles I of Spain and brought to a definitive closure in 1865 by Maximilian I of Mexico. Instead of reviving what he saw as an anachronistic institution with strong ties to the Roman Catholic Church, he aimed to merge and expand Mexico City's decentralized colleges of higher education and create a new university, secular in nature and national in scope, that could reorganize higher education within the country, serve as a model of positivism and encompass the ideas of the dominant Mexican liberalism.
The project unified the Fine Arts, Political Science, Engineering, Medicine and the National Preparatory schools. The new university's challenges were political, due to the ongoing Mexican Revolution and the fact that the federal government had direct control over the university's policies and curriculum; this opposition led to disruptions in the function of the university when political instability forced resignations in the government, including that of President Díaz. Internally, the first student strike occurred in 1912 to protest examination methods introduced by the director of the School of Jurisprudence, Luis Cabrera. By July of that year, a majority of the law students decided to abandon the university and join the newly created Free School of Law. In 1914 initial efforts to gain autonomy for the university failed. In 1920, José Vasconcelos became rector. In 1921, he created the school's coat-of-arms: the image of an eagle and a condor surrounding a map of Latin America, from Mexico's northern border to Tierra del Fuego, the motto, "The Spirit shall speak for my race".
Efforts to gain autonomy for the university continued in the early 1920s. In the mid-1920s, the second wave of student strikes opposed a new grading system; the strikes included major classroom walkouts in the law school and confrontation with police at the medical school. The striking students were supported by many professors and subsequent negotiations led to autonomy for the university; the institution was no longer a dependency of the Secretariat of Public Education. During the early 1930s, the rector of UNAM was Manuel Gómez Morín; the government attempted to implement socialist education at Mexican universities, which Gómez Morín, many professors, Catholics opposed as an infringement on academic freedom. Gómez Morín with the support of the Jesuit-founded student group, the Unión Nacional de Estudiantes Católicos fought against socialist education. UNAM supported the recognition of the academic certificates by Catholic preparatory schools, which validated their educational function. In an interesting turn of events, UNAM played an important role in the founding of the Jesuit institution in 1943, the Universidad Iberoamericana in 1943.
However, UNAM opposed initiatives at the Universidad Iberoamericana in years, opposing the establishment of majors in industrial relations and communications. In 1943 initial decisions were made to move the university from the various buildings it occupied in the city center to a new and consolidated university campus; the first stone laid was that of the faculty of Sciences, the first building of Ciudad Universitaria. President Miguel Alemán Valdés participated in the ceremony on 20 November 1952; the University Olympic Stadium was inaugurated on the same day. In 1957 the Doctorate Council was created to organize graduate studies. Another major student strike, again over examination regulations, occurred in 1966. Students forced the rector to resign; the Board of Regents did not accept this resignation, so the professors went on