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Akodon Philipmyersi
Philip Myers's akodont (''Akodon philipmyersi'') is a recently described species of grass mouse from Misiones Province, Argentina. Like other grass mice, A. philipmyersi is a small, non-descript, greyish-brown mouse with prominent ears. The species was recognized as distinct from other grass mice on the basis of unique features of karyology, genetic sequence, cranial measurements, and general morphology. Etymology The specific epithet for this animal, ''philipmyersi'', is named after renowned mammalogist Philip Myers of the University of Michigan Museum of Zoology and major contributor to thAnimal Diversity Web Philip Myers has made major contributions in determining the relationships among members of the genus ''Akodon''. Description ''A. philipmyersi'' is described as having a small body size, tail, and limbs relative to other members of the genus. The animals have a karyotype of ( 2n=36, FN=42). The species differs from its only sympatric relative, '' A. montensis'', ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Akodon
''Akodon'' is a genus consisting of South American grass mice. They mostly occur south of the Amazon Basin and along the Andes north to Venezuela, but are absent from much of the basin itself, the far south of the continent, and the lowlands west of the Andes. ''Akodon'' is one of the most species-rich genera of Neotropical rodents. Species of ''Akodon'' are known to inhabit a variety of habitats from tropical and tropical moist forests to altiplano and desert. Fossils are known from the late Pliocene onwards. Taxonomy ''Akodon'' is the largest genus in the tribe Akodontini. Three of its synonyms—''Chalcomys'', ''Hypsimys'', and particularly ''Microxus''—have sometimes been regarded as distinct genera. Neomicroxus was separated in 2013. Previously associated with ''Akodon'', the genera '' Abrothrix'', '' Deltamys'', '' Necromys'', '' Thalpomys'', and '' Thaptomys'' are currently recognized as distinct. Some species of the tribe Abrotrichini are called akodons. The genus c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Misiones Province
Misiones (, ''Missions'') is one of the 23 provinces of Argentina, located in the northeastern corner of the country in the Mesopotamia region. It is surrounded by Paraguay to the northwest, Brazil to the north, east and south, and Corrientes Province of Argentina to the southwest. This was an early area of Roman Catholic missionary activity by the Society of Jesus in what was then called the Province of Paraguay, beginning in the early 17th century. In 1984 the ruins of four mission sites in Argentina were designated World Heritage Sites by UNESCO. History Indigenous peoples of various tribes lived in the area of the future province for thousands of years. At the time of European encounter, it was occupied by the Kaingang and Xokleng tribes, later followed by the Guarani tribe. The first European to visit the region, Sebastian Cabot, discovered Apipé Falls while navigating the Paraná River in December 1527. In 1541 Álvar Núñez Cabeza de Vaca reached the Iguaz ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Argentina
Argentina (), officially the Argentine Republic ( es, link=no, República Argentina), is a country in the southern half of South America. Argentina covers an area of , making it the second-largest country in South America after Brazil, the fourth-largest country in the Americas, and the eighth-largest country in the world. It shares the bulk of the Southern Cone with Chile to the west, and is also bordered by Bolivia and Paraguay to the north, Brazil to the northeast, Uruguay and the South Atlantic Ocean to the east, and the Drake Passage to the south. Argentina is a federal state subdivided into twenty-three provinces, and one autonomous city, which is the federal capital and largest city of the nation, Buenos Aires. The provinces and the capital have their own constitutions, but exist under a federal system. Argentina claims sovereignty over the Falkland Islands, South Georgia and the South Sandwich Islands, and a part of Antarctica. The earliest recorded ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Karyology
A karyotype is the general appearance of the complete set of metaphase chromosomes in the cells of a species or in an individual organism, mainly including their sizes, numbers, and shapes. Karyotyping is the process by which a karyotype is discerned by determining the chromosome complement of an individual, including the number of chromosomes and any abnormalities. A karyogram or idiogram is a graphical depiction of a karyotype, wherein chromosomes are organized in pairs, ordered by size and position of centromere for chromosomes of the same size. Karyotyping generally combines light microscopy and photography, and results in a photomicrographic (or simply micrographic) karyogram. In contrast, a schematic karyogram is a designed graphic representation of a karyotype. In schematic karyograms, just one of the sister chromatids of each chromosome is generally shown for brevity, and in reality they are generally so close together that they look as one on photomicrographs as well ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gene
In biology, the word gene (from , ; "... Wilhelm Johannsen coined the word gene to describe the Mendelian units of heredity..." meaning ''generation'' or ''birth'' or ''gender'') can have several different meanings. The Mendelian gene is a basic unit of heredity and the molecular gene is a sequence of nucleotides in DNA that is transcribed to produce a functional RNA. There are two types of molecular genes: protein-coding genes and noncoding genes. During gene expression, the DNA is first copied into RNA. The RNA can be directly functional or be the intermediate template for a protein that performs a function. The transmission of genes to an organism's offspring is the basis of the inheritance of phenotypic traits. These genes make up different DNA sequences called genotypes. Genotypes along with environmental and developmental factors determine what the phenotypes will be. Most biological traits are under the influence of polygenes (many different genes) as well as g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Skull
The skull is a bone protective cavity for the brain. The skull is composed of four types of bone i.e., cranial bones, facial bones, ear ossicles and hyoid bone. However two parts are more prominent: the cranium and the mandible. In humans, these two parts are the neurocranium and the viscerocranium ( facial skeleton) that includes the mandible as its largest bone. The skull forms the anterior-most portion of the skeleton and is a product of cephalisation—housing the brain, and several sensory structures such as the eyes, ears, nose, and mouth. In humans these sensory structures are part of the facial skeleton. Functions of the skull include protection of the brain, fixing the distance between the eyes to allow stereoscopic vision, and fixing the position of the ears to enable sound localisation of the direction and distance of sounds. In some animals, such as horned ungulates (mammals with hooves), the skull also has a defensive function by providing the mount (on the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Morphology (biology)
Morphology is a branch of biology dealing with the study of the form and structure of organisms and their specific structural features. This includes aspects of the outward appearance ( shape, structure, colour, pattern, size), i.e. external morphology (or eidonomy), as well as the form and structure of the internal parts like bones and organs, i.e. internal morphology (or anatomy). This is in contrast to physiology, which deals primarily with function. Morphology is a branch of life science dealing with the study of gross structure of an organism or taxon and its component parts. History The etymology of the word "morphology" is from the Ancient Greek (), meaning "form", and (), meaning "word, study, research". While the concept of form in biology, opposed to function, dates back to Aristotle (see Aristotle's biology), the field of morphology was developed by Johann Wolfgang von Goethe (1790) and independently by the German anatomist and physiologist Karl Fr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Philip Myers (biologist) , Canadian ice hockey player
{{hndis, Myers, Philip ...
Philip Myers may refer to: * Philip Myers (musician), American French horn player * Sir Philip Myers (police officer), British police officer * Philip van Ness Myers, American historian See also * Phillip Myers, politician and auctioneer in New South Wales, Australia * Philippe Myers Philippe "Phil" Myers (born January 25, 1997) is a Canadian professional ice hockey defenceman who currently plays for the Syracuse Crunch in the American Hockey League (AHL) while under contract to the Tampa Bay Lightning of the National Hockey ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Museums At The University Of Michigan
The University of Michigan in Ann Arbor is home to a number of museums. Located on the university's Central Campus are University of Michigan Museum of Natural History; the University of Michigan Museum of Art; the Kelsey Museum of Archaeology; Sindecuse Museum of Dentistry of the School of Dentistry. Adjacent to the Central Campus is the Nichols Arboretum and Matthaei Botanical Gardens. Located on the university's North Campus is the Warren Robbins Gallery and Slusser Gallery of the Penny W. Stamps School of Art & Design and the Stearns Collection of Musical Instruments of the School of Music, Theatre & Dance. Central Campus University of Michigan Museum of Natural History The University of Michigan Museum of Natural History, formerly known as the Exhibit Museum of Natural History, began in the mid-19th century and expanded greatly with the donation of 60,000 specimens by Joseph Beal Steere, an UM alumnus, in the 1870s. The building also houses three research museums: ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Karyotype
A karyotype is the general appearance of the complete set of metaphase chromosomes in the cells of a species or in an individual organism, mainly including their sizes, numbers, and shapes. Karyotyping is the process by which a karyotype is discerned by determining the chromosome complement of an individual, including the number of chromosomes and any abnormalities. A karyogram or idiogram is a graphical depiction of a karyotype, wherein chromosomes are organized in pairs, ordered by size and position of centromere for chromosomes of the same size. Karyotyping generally combines light microscopy and photography, and results in a photomicrographic (or simply micrographic) karyogram. In contrast, a schematic karyogram is a designed graphic representation of a karyotype. In schematic karyograms, just one of the sister chromatids of each chromosome is generally shown for brevity, and in reality they are generally so close together that they look as one on photomicrographs as well u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sympatric
In biology, two related species or populations are considered sympatric when they exist in the same geographic area and thus frequently encounter one another. An initially interbreeding population that splits into two or more distinct species sharing a common range exemplifies sympatric speciation. Such speciation may be a product of reproductive isolation – which prevents hybrid offspring from being viable or able to reproduce, thereby reducing gene flow – that results in genetic divergence. Sympatric speciation may, but need not, arise through secondary contact, which refers to speciation or divergence in allopatry followed by range expansions leading to an area of sympatry. Sympatric species or taxa in secondary contact may or may not interbreed. Types of populations Four main types of population pairs exist in nature. Sympatric populations (or species) contrast with parapatric populations, which contact one another in adjacent but not shared ranges and do ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Akodon Montensis
The montane grass mouse (''Akodon montensis'') is a rodent species from South America. It is found in Argentina, Brazil, Paraguay and Uruguay. See also *''Trichuris navonae ''Trichuris navonae'' is parasite found in forest dwelling mice, '' Akodon montensis'', in South America, specifically within the Paranaense Forest. To date, twenty-two ''Trichuris ''Trichuris'', often referred to as whipworms (which typical ...'', a parasite of ''A. montensis'' References * Akodon Mammals described in 1913 Taxa named by Oldfield Thomas {{Akodon-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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