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Bovina (subtribe)
Bovina is a subtribe of the Bovini tribe that generally includes the two living genera, '' Bison'' and ''Bos''. However, this dichotomy has been challenged recently by molecular work that suggests that ''Bison'' should be regarded as a subgenus of ''Bos''. Wild bovinans can be found naturally in North America and Eurasia (although domestic and feral populations have been introduced worldwide). Taxonomy Placement within Bovini The majority of phylogenetic work based on ribosomal DNA, chromosomal analysis, autosomal introns and mitochondrial DNA has recovered three distinctive subtribes of Bovini: Pseudorygina (represent solely by the saola), Bubalina (buffalo), and Bovina. Genera and species Extant In 1945 American paleontologist and mammalogist George Gaylord Simpson had considered there to be three genera of bovinans. In addition to recognizing ''Bos'' and ''Bison'', he assigned the several Asiatic tropical species such as gaur and banteng into the genus ''Bibos''. The Ger ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Late Miocene
The Late Miocene (also known as Upper Miocene) is a sub-epoch of the Miocene epoch (geology), Epoch made up of two faunal stage, stages. The Tortonian and Messinian stages comprise the Late Miocene sub-epoch, which lasted from 11.63 Ma (million years ago) to 5.333 Ma. The evolution of life The gibbons (family Hylobatidae) and orangutans (genus ''Pongo'') are the first groups to split from the line leading to the hominins, including humans, then gorillas (genus ''Gorilla''), and finally, chimpanzees and bonobos (genus ''Pan (genus), Pan''). The splitting date between hominin and chimpanzee lineages is placed by some between 4 to 8 million years ago, that is, during the Late Miocene. References External links GeoWhen Database - Late Miocene Miocene, .03 Miocene geochronology, 03 Messinian, * Tortonian, * {{geochronology-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hans Reck
Hans Gottfried Reck (24 January 1886 – 4 August 1937) was a German volcanologist and paleontologist. In 1913 he was the first to discover an ancient skeleton of a human in the Olduvai Gorge, in what is now Tanzania. He collaborated with Louis Leakey in a return expedition to the site in 1931. Birth and education Reck was born into a military family in Würzburg, Bavaria on 24 January 1886. He attended the universities of Wurzburg and Berlin, where he studied natural history and became deeply interested in volcanoes. Iceland In the summer of 1907 the geologist Walther von Knebel, a friend and fellow student of Reck's, disappeared during a field trip in Iceland. Hans Reck was charged with determining what had happened, and set out in June 1908 with two local guides and his fiancé, Ina von Grumbkow. The party traveled on horseback in eleven weeks. Reck and the Icelander Sigurður Sumarliðason were the first people ever to reach the summit of the Herðubreið volcano, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chromosomal
A chromosome is a long DNA molecule with part or all of the genetic material of an organism. In most chromosomes the very long thin DNA fibers are coated with packaging proteins; in eukaryotic cells the most important of these proteins are the histones. These proteins, aided by chaperone proteins, bind to and condense the DNA molecule to maintain its integrity. These chromosomes display a complex three-dimensional structure, which plays a significant role in transcriptional regulation. Chromosomes are normally visible under a light microscope only during the metaphase of cell division (where all chromosomes are aligned in the center of the cell in their condensed form). Before this happens, each chromosome is duplicated (S phase), and both copies are joined by a centromere, resulting either in an X-shaped structure (pictured above), if the centromere is located equatorially, or a two-arm structure, if the centromere is located distally. The joined copies are now called sis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ribosomal DNA
Ribosomal DNA (rDNA) is a DNA sequence that codes for ribosomal RNA. These sequences regulate transcription initiation and amplification, and contain both transcribed and non-transcribed spacer segments. In the human genome there are 5 chromosomes with nucleolus organizer regions: the acrocentric chromosomes 13 (RNR1), 14 ( RNR2), 15 ( RNR3), 21 (RNR4) and 22 (RNR5). The genes that are responsible for encoding the various sub-units of rRNA are located across multiple chromosomes in humans. But the genes that encode for rRNA are highly conserved across the domains, with only the copy numbers involved for the genes having varying numbers per species. In Bacteria, Archaea, and chloroplasts the rRNA is composed of different (smaller) units, the large (23S) ribosomal RNA, 16S ribosomal RNA and 5S rRNA. The 16S rRNA is widely used for phylogenetic studies. Eukaryotes The rRNA transcribed from the approximately 600 rDNA repeats forms the most abundant section of RNA found in cells ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Syncerus
''Syncerus'' is a genus of African bovid that contains the living Cape buffalo ''(Syncerus caffer)'', including the distinct African forest buffalo The African forest buffalo (''Syncerus caffer nanus''), also known as the dwarf buffalo or the Congo buffalo, is the smallest subspecies of the African buffalo. It is related to the Cape buffalo (''Syncerus caffer caffer''), the Sudan buffalo .... At least one extinct species belongs to this genus; '' Syncerus acoelotus''. The extinct giant African buffalo ('' Syncerus antiquus'') is also included in this genus by many authorities. References Mammal genera Mammal genera with one living species Taxa named by Brian Houghton Hodgson Bovines {{eventoedungulate-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bubalus
''Bubalus'' is a genus of Asiatic bovines that was proposed by Charles Hamilton Smith in 1827. ''Bubalus'' and '' Syncerus'' form the subtribe Bubalina, the true buffaloes. The International Code of Zoological Nomenclature and classification of domestic animals as species, subspecies, races or breeds has been discussed controversially for many years and was inconsistent between authors. Assessors of the Food and Agriculture Organization consider domestic water buffalo populations as breeds. ''Bubalus'' species comprise the domestic water buffalo (''B. bubalis''), the wild water buffalo (''B. arnee''), the tamaraw (''B. mindorensis)'', the lowland anoa (''B. depressicornis''), and the mountain anoa (''B. quarlesi''). The latter two anoa species were proposed to form a subgenus within ''Bubalus''. Characteristics Smith described ''Bubalus'' as low in proportion to the bulk with very solid limbs, a small dewlap and a long, slender tail; the head is large with a strong convex-s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bubalina
Bubalina is a subtribe of Bovini, wild cattle that includes the various species of true buffalo. Species include the African buffalo, the anoas, and the wild water buffalo (including the domesticated variant water buffalo). Buffaloes can be found naturally in sub-Saharan Africa, South Asia and Southeast Asia, and domestic and feral populations have been introduced to Europe, the Americas, and Australia. In addition to the living species, bubalinans have an extensive fossil record where remains have been found in much of Afro-Eurasia. Despite being sometimes referred to as buffaloes, bison are not members of the Bubalina, but are instead classified in the subtribe Bovina (subtribe), Bovina. Taxonomy Placement within Bovini The majority of phylogenetic work based on ribosomal DNA, chromosomal analysis, autosomal introns and mitochondrial DNA has recovered three distinctive subtribes of Bovini: Pseudorygina (represented solely by the saola), Bubalina, and Bovina (which today ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pseudoryx
The saola (''Pseudoryx nghetinhensis''), also called spindlehorn, Asian unicorn, or infrequently, Vu Quang bovid, is one of the world's rarest large mammals, a forest-dwelling bovine native to the Annamite Range in Vietnam and Laos. It was described in 1993 following a discovery of remains in Vũ Quang National Park by a joint survey of the Vietnamese Ministry of Forestry and the World Wide Fund for Nature. Saolas have since been kept in captivity multiple times, although only for short periods as they died within a matter of weeks to months. The species was first reported in 1992 by Do Tuoc, a forest ecologist, and his associates. The first photograph of a living saola was taken in captivity in 1993. The most recent one was taken in 2013 by a movement-triggered camera in the forest of central Vietnam. It is the only species in genus ''Pseudoryx''. Taxonomy In May 1992, the Ministry of Forestry, Vietnam sent a survey team to examine the biodiversity of the newly established V ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saola
The saola (''Pseudoryx nghetinhensis''), also called spindlehorn, Asian unicorn, or infrequently, Vu Quang bovid, is one of the world's rarest large mammals, a forest-dwelling bovine native to the Annamite Range in Vietnam and Laos. It was described in 1993 following a discovery of remains in Vũ Quang National Park by a joint survey of the Vietnamese Ministry of Forestry and the World Wide Fund for Nature. Saolas have since been kept in captivity multiple times, although only for short periods as they died within a matter of weeks to months. The species was first reported in 1992 by Do Tuoc, a forest ecologist, and his associates. The first photograph of a living saola was taken in captivity in 1993. The most recent one was taken in 2013 by a movement-triggered camera in the forest of central Vietnam. It is the only species in genus ''Pseudoryx''. Taxonomy In May 1992, the Ministry of Forestry, Vietnam sent a survey team to examine the biodiversity of the newly established V ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Feral
A feral () animal or plant is one that lives in the wild but is descended from domesticated individuals. As with an introduced species, the introduction of feral animals or plants to non-native regions may disrupt ecosystems and has, in some cases, contributed to extinction of indigenous species. The removal of feral species is a major focus of island restoration. Animals A feral animal is one that has escaped from a domestic or captive status and is living more or less as a wild animal, or one that is descended from such animals. Other definitions include animals that have changed from being domesticated to being wild, natural, or untamed. Some common examples of animals with feral populations are horses, dogs, goats, cats, rabbits, camels, and pigs. Zoologists generally exclude from the feral category animals that were genuinely wild before they escaped from captivity: neither lions escaped from a zoo nor the white-tailed eagles re-introduced to the UK are regarded as fera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bovini
The Tribe (biology), tribe Bovini, or wild cattle, are medium to massive Bovinae, bovines that are native to North America, Eurasia, and Africa. These include the enigmatic, antelope-like saola, the African and Asiatic Bubalina, buffalos, and a clade that consists of bison and the wild cattle of the genus ''Bos''. Not only are they the largest members of the subfamily Bovinae, they are the largest species of their family Bovidae. The largest species is the gaur (''Bos gaurus''), weighing up to . Bovins and humans have had a long and complex relationship. Five of seven species have been successfully domesticated, with one species (cattle) being the most successful member of their lineage. Domesticated shortly after the Last Glacial Period, last ice age, Op. cit. in there are at least 1.4 billion cattle in the world. Domestic bovins have been selectively bred for beef, dairy products and leather, and serve as working animals. However, many species of wild cattle are threatened by e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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