|
Mountain Degu
The mountain degu (''Octodontomys gliroides''), also known as the Andean degu, is a species of rodent in the family Octodontidae. It is monotypic, the only species in the genus ''Octodontomys''. It is found in the foothills of the Andes in Argentina, Bolivia and Chile. Phylogeny The phylogeny and placement of ''O. gliroides'' in relation to other octodontids was originally unclear. A study of mitochondrial DNA across the species' range published in 2016 solidified ''Octodontomys'' as a monophyletic group, albeit one with two distinct lineages, one of which is distributed across Bolivia and northern Chile, the other restricted to Argentina. The following cladogram is adapted from Rivera et al., 2014: Description The mountain degu is a moderate sized rodent with a length of , including a tail of , and a bodyweight in the range . The hairs are long and silky. The upper surface is greyish-brown, the chin is pure white, and the underparts are white with a grey base to the hairs. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Humahuaca Department
Humahuaca Department is a department located in the Jujuy Province of Argentina. Its capital city is Humahuaca. Part of the Quebrada de Humahuaca extends through the length of the department. Size, borders and access Humahuaca Department has a surface area of , and as of the 2010 census had a population density of 4.6 inhabitants per square kilometer. The department is bordered on the east by the province of Salta, on the west by Cochinoca Department Cochinoca is a department located in the Jujuy Province, (Argentina Argentina, officially the Argentine Republic, is a country in the southern half of South America. It covers an area of , making it the List of South American countries b ..., and on the south by the Tumbaya, Tilcara, and Valle Grande Departments. The primary means of accessing the department is via National Route 9. References Departments of Jujuy Province {{Jujuy-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Octodon
''Octodon'' is a genus of octodontid rodents native to South America, in particular in the Chilean Andes. The best-known member is the common degu, ''O. degus'', which is kept as a pet in various countries. Two of the four species of degus are nocturnal.University of Michigan Classification This genus was first described in 1832 by the British zoologist Edward Turner Bennett.Taxonomy The genus name ''Octodon'' comes from the Latin ''octo'', eight, with reference to their teeth, molars and premolars having the shape of the number 8. The full list of species is: ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gestation Period
In mammals, pregnancy is the period of reproduction during which a female carries one or more live offspring from implantation in the uterus through gestation. It begins when a fertilized zygote implants in the female's uterus, and ends once it leaves the uterus. Fertilization and implantation During copulation, the male inseminates the female. The spermatozoon fertilizes an ovum or various ova in the uterus or oviducts, and this results in one or multiple zygotes. Sometimes, a zygote can be created by humans outside of the animal's body in the artificial process of in-vitro fertilization. After fertilization, the newly formed zygote then begins to divide through mitosis, forming an embryo, which implants in the female's endometrium. At this time, the embryo usually consists of 50 cells. Development After implantation A blastocele is a small cavity on the center of the embryo, and the developing embryonary cells will grow around it. Then, a flat layer cell forms on the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cavia
''Cavia'' is a genus in the subfamily Caviinae that contains the rodents commonly known as the guinea pigs or cavies. The best-known species in this genus is the domestic guinea pig, ''Cavia porcellus'', a meat animal in South America and a common household pet outside that continent. Characteristics General characteristics The true guinea pigs are medium-sized rodents. They reach a head-body length of 20 to 35 centimeters (8 to 14 inches) and a weight of 500 to a maximum of 1,000 grams. The largest species of the genus is the greater guinea pig (''Cavia magna''). The species are very similar in habit and appearance, the long and relatively rough fur is usually grayish or brown to reddish-brown in color. The coloring can be variable, especially in species with a large distribution area and several subspecies. The head is relatively large in relation to the body, the eyes are large and the ears are small. The legs are short and strong, the front feet have four toes and the h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Common Degu
The common degu (''Octodon degus''; ), or, historically, the degu, is a small hystricomorpha rodent endemic to the Chilean matorral ecoregion of central Chile. The name ''degu'' on its own indicates either the entire genus '' Octodon'' or, more commonly, just the common degu. Common degus belong to the parvorder Caviomorpha of the infraorder Hystricognathi, along with the chinchilla and guinea pig. The word ''degu'' comes from the indigenous language of Chile, Mapudungun, and the word ''dewü'', meaning 'mouse' or 'rat'. The animal may be kept as a domestic pet, though there are prohibitions on their ownership in some territories. As a pet, the animal is larger than a golden hamster but smaller than a fancy rat. Description The common degu is a small animal with a body length of and a weight of . It has yellow-brown fur above and creamy-yellow below, with yellow around the eyes and a paler band around the neck. It has a long, thin tail with a tufted, black tip, dark sparsel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Autotomy
Autotomy (from the Greek ''auto-'', "self-" and ''tome'', "severing", αὐτοτομία) or 'self-amputation', is the behaviour whereby an animal sheds or discards an appendage, usually as a self-defense mechanism to elude a predator's grasp or to distract the predator and thereby allow escape. Some animals are able to regenerate the lost body part later. Autotomy is thought to have evolved independently at least nine times. The term was coined in 1883 by Leon Fredericq. Vertebrates Reptiles and amphibians Some lizards, salamanders and tuatara when caught by the tail will shed part of it in attempting to escape. In many species the detached tail will continue to wriggle, creating a deceptive sense of continued struggle, and distracting the predator's attention from the fleeing prey animal. In addition, many species of lizards, such as '' Plestiodon fasciatus'', '' Cordylosaurus subtessellatus'', '' Holaspis guentheri'', '' Phelsuma barbouri'', and '' Ameiva wetmorei'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Herbivore
A herbivore is an animal anatomically and physiologically evolved to feed on plants, especially upon vascular tissues such as foliage, fruits or seeds, as the main component of its diet. These more broadly also encompass animals that eat non-vascular autotrophs such as mosses, algae and lichens, but do not include those feeding on decomposed plant matters (i.e. detritivores) or macrofungi (i.e. fungivores). As a result of their plant-based diet, herbivorous animals typically have mouth structures ( jaws or mouthparts) well adapted to mechanically break down plant materials, and their digestive systems have special enzymes (e.g. amylase and cellulase) to digest polysaccharides. Grazing herbivores such as horses and cattles have wide flat- crowned teeth that are better adapted for grinding grass, tree bark and other tougher lignin-containing materials, and many of them evolved rumination or cecotropic behaviors to better extract nutrients from plants. A larg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nocturnal
Nocturnality is a ethology, behavior in some non-human animals characterized by being active during the night and sleeping during the day. The common adjective is "nocturnal", versus diurnality, diurnal meaning the opposite. Nocturnal creatures generally have highly developed senses of hearing (sense), hearing, olfaction, smell, and specially adapted eyesight. Some animals, such as ferrets, have eyes that can adapt to both low-level and bright day levels of illumination (see metaturnal). Others, such as bushbaby, bushbabies and (some) bats, can function only at night. Many nocturnal creatures including tarsier, tarsiers and some owl, owls have large eyes in comparison with their body size to compensate for the lower light levels at night. More specifically, they have been found to have a larger cornea relative to their eye size than diurnal creatures to increase their : in the low-light conditions. Nocturnality helps wasps, such as ''Apoica flavissima'', avoid hunting in intens ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Potosí Department
Potosí (; Southern Quechua, Quechua: ''P'utuqsi''; Aymara language, Aymara: ''Putusi'') is a Departments of Bolivia, department in southwestern Bolivia. Its area is 118,218 km2 and its population is 856,419 (2024 census). The capital is the city of Potosí. It is a mostly barren, mountainous region with one large plateau to the west, where the largest Salt pan (geology), salt flat in the world, Salar de Uyuni, is located. Cerro Rico, Cerro Potosí was the richest province in the Spanish Empire, providing a great percentage of the silver that was Spanish treasure fleet, shipped to Europe. Potosi is also the location of the San Cristóbal mine (Bolivia), San Cristóbal silver, zinc and lead mines, developed by the US company Apex Silver Mines Limited of Colorado and sold in November 2008 to the Japanese Sumitomo Corporation. History In March 2023, social organisations in four regions of Potosí, with the support of regional MAS-IPSP lawmakers, called for a strike spannin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jujuy Province
Jujuy is a province of Argentina, located in the extreme northwest of the country, at the borders with Chile and Bolivia. The only neighboring Argentine province is Salta to the east and south. Geography There are three main areas in Jujuy: *The Altiplano, a plateau high with peaks of , covers most of the province. *The Río Grande of Jujuy cuts through the Quebrada de Humahuaca canyon, of heights between . *To the southeast, the sierras descends to the Gran Chaco region. The vast difference in height and climate produces desert areas such as the Salinas Grandes salt mines and subtropical Yungas jungle. The terrain of the province is mainly arid and semi-desertic across the different areas, except for the ''El Ramal'' valley of the San Francisco River. Temperature difference between day and night is wider in higher lands, and precipitation is scarce outside the temperate area of the San Francisco River. The Grande River and the San Francisco River flow to the Berme ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aconaemys Sagei
Sage's rock rat (''Aconaemys sagei'') is a species of rodent in the family Octodontidae. It is found in Argentina and possibly Chile Chile, officially the Republic of Chile, is a country in western South America. It is the southernmost country in the world and the closest to Antarctica, stretching along a narrow strip of land between the Andes, Andes Mountains and the Paci .... References * Aconaemys Mammals of Argentina Mammals of Chile Mammals described in 1984 Taxa named by Oliver Payne Pearson Taxonomy articles created by Polbot {{rodent-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
