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Nesoryzomys
''Nesoryzomys'' is a genus of rodent in the tribe Oryzomyini of family Cricetidae, endemic to the Galápagos Islands. Five species have been described, with two of them considered extinct. Other rodents restricted to the Galápagos include '' Megaoryzomys curioi'' and ''Aegialomys galapagoensis ''Aegialomys'' is a genus of oryzomyini, oryzomyine rodents from the lowlands and mountains of western Peru and Ecuador, including the Galápagos Islands. The species in this genus have historically been placed in ''Oryzomys'', but according to c ...''. References Castañeda-Rico, S., Johnson, S. A., Clement, S. A., Dowler, R. C., Maldonado, J. E., & Edwards, C. W. (2019). Insights into the evolutionary and demographic history of the extant endemic rodents of the Galápagos Islands. Therya, 10(3). https://doi.org/10.12933/therya-19-873 Endemic fauna of the Galápagos Islands Rodent genera Taxonomy articles created by Polbot {{Sigmodontinae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nesoryzomys Indefessus
''Nesoryzomys indefessus'', also known as the Santa Cruz nesoryzomys or Indefatigable Galápagos mouse, is an extinct species of rodent from the genus ''Nesoryzomys'' of family Cricetidae from Galápagos Islands of Ecuador. It formerly lived on Santa Cruz Island, but is now extinct, probably due to the introduction of black rats. Another related rodent, '' N. narboroughi'', is sometimes considered to be a subspecies of ''N. indefessus''. Etymology Its specific name Specific name may refer to: * in Database management systems, a system-assigned name that is unique within a particular database In taxonomy, either of these two meanings, each with its own set of rules: * Specific name (botany), the two-part (bino ... is Latin for "unwearied, indefatigable", but the species was named after its island, which was formerly known as "Indefatigable Island" after a ship with the same name. References Nesoryzomys Extinct rodents Extinct mammals of South America Endemic fauna of the Ga ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endemic
Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsewhere. For example, the Cape sugarbird is found exclusively in southwestern South Africa and is therefore said to be ''endemic'' to that particular part of the world. An endemic species can also be referred to as an ''endemism'' or, in scientific literature, as an ''endemite''. Similarly, many species found in the Western ghats of India are examples of endemism. Endemism is an important concept in conservation biology for measuring biodiversity in a particular place and evaluating the risk of extinction for species. Endemism is also of interest in evolutionary biology, because it provides clues about how changes in the environment cause species to undergo range shifts (potentially expanding their range into a larger area or bec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nesoryzomys
''Nesoryzomys'' is a genus of rodent in the tribe Oryzomyini of family Cricetidae, endemic to the Galápagos Islands. Five species have been described, with two of them considered extinct. Other rodents restricted to the Galápagos include '' Megaoryzomys curioi'' and ''Aegialomys galapagoensis ''Aegialomys'' is a genus of oryzomyini, oryzomyine rodents from the lowlands and mountains of western Peru and Ecuador, including the Galápagos Islands. The species in this genus have historically been placed in ''Oryzomys'', but according to c ...''. References Castañeda-Rico, S., Johnson, S. A., Clement, S. A., Dowler, R. C., Maldonado, J. E., & Edwards, C. W. (2019). Insights into the evolutionary and demographic history of the extant endemic rodents of the Galápagos Islands. Therya, 10(3). https://doi.org/10.12933/therya-19-873 Endemic fauna of the Galápagos Islands Rodent genera Taxonomy articles created by Polbot {{Sigmodontinae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aegialomys Galapagoensis
''Aegialomys'' is a genus of oryzomyini, oryzomyine rodents from the lowlands and mountains of western Peru and Ecuador, including the Galápagos Islands. The species in this genus have historically been placed in ''Oryzomys'', but according to cladistics, cladistic research, the genus is more closely related to a group containing, among others, ''Nectomys'' and ''Sigmodontomys'', than to ''Oryzomys''. The generic name ''Aegialomys'' means "coastal mouse" in Ancient Greek ( "coast" and "mouse") and references the mostly coastal occurrence of the genus. ''Aegialomys'' species have a greyish to buff dorsal pelage which is divided sharply from the white to light yellow ventral pelage. They have relatively short ears. There are crowns of hair at the bases of the toes. The tail is equal to or longer than the body and is darker above than below. There are two commonly recognized and described species in the genus: the mainland ''Aegialomys xanthaeolus, A. xanthaeolus'', the type speci ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Megaoryzomys
''Megaoryzomys curioi'', also known as the Galápagos giant rat, is an extinct species of sigmodontine rodent, known only from Santa Cruz Island in the Galápagos Islands. It likely met its demise when European settlers introduced invasive species to the island. It is the only species in the genus ''Megaoryzomys''. Its relationships have historically been unclear; it has been placed in both Oryzomyini and Thomasomyini The rodent subfamily Sigmodontinae includes New World rats and mice, with at least 376 species. Many authorities include the Neotominae and Tylomyinae as part of a larger definition of Sigmodontinae. When those genera are included, the species c ... in the past. A 2020 study favoured placing it in the former on overall skull morphology. References * Sigmodontinae Mammals described in 1979 Endemic fauna of the Galápagos Islands Monotypic rodent genera {{Sigmodontinae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Extinct
Extinction is the termination of an organism by the death of its Endling, last member. A taxon may become Functional extinction, functionally extinct before the death of its last member if it loses the capacity to Reproduction, reproduce and recover. As a species' potential Range (biology), range may be very large, determining this moment is difficult, and is usually done retrospectively. This difficulty leads to phenomena such as Lazarus taxon, Lazarus taxa, where a species presumed extinct abruptly "reappears" (typically in the Fossil, fossil record) after a period of apparent absence. Over five billion species are estimated to have died out. It is estimated that there are currently around 8.7 million species of eukaryotes globally, possibly many times more if microorganisms are included. Notable extinct animal species include Dinosaur, non-avian dinosaurs, Machairodontinae, saber-toothed cats, and mammoths. Through evolution, species arise through the process of specia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Galápagos Islands
The Galápagos Islands () are an archipelago of volcanic islands in the Eastern Pacific, located around the equator, west of the mainland of South America. They form the Galápagos Province of the Republic of Ecuador, with a population of slightly over 33,000 (2020). The province is divided into the Cantons of Ecuador, cantons of San Cristóbal Island, San Cristóbal, Santa Cruz Island (Galápagos), Santa Cruz, and Isabela Island (Galápagos), Isabela, the three most populated islands in the chain. The Galápagos are famous for their large number of Endemism, endemic species, which were studied by Charles Darwin in the 1830s and inception of Darwin's theory, inspired his theory of evolution by means of natural selection. All of these islands are protected as part of Ecuador's Galápagos National Park and Galápagos Marine Reserve, Marine Reserve. Thus far, there is no firm evidence that Polynesian expansion, Polynesians or the indigenous peoples of South America, Indigenous pe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cricetidae
The Cricetidae are a family of rodents in the large and complex superfamily Muroidea. It includes true hamsters, voles, lemmings, muskrats, and New World rats and mice. At over 870 species, it is either the largest or second-largest family of mammals, and has members throughout the Americas, Europe and Asia. Characteristics The cricetids are small mammals, ranging from just in length and in weight in the New World pygmy mouse up to and in the muskrat. The length of their tails varies greatly in relation to their bodies, and they may be either furred or sparsely haired. The fur of most species is brownish in colour, often with a white underbelly, but many other patterns exist, especially in the cricetine and arvicoline subfamilies. Like the Old World mice, cricetids are adapted to a wide range of habitats, from the high Arctic to tropical rainforests and hot deserts. Some are arboreal, with long balancing tails and other adaptations for climbing, while others ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nesoryzomys Fernandinae
''Nesoryzomys fernandinae'', also known as the Fernandina nesoryzomys, Fernandina rice rat, or Fernandina Galápagos mouse, is a species of rodent in the genus ''Nesoryzomys'' of family Cricetidae. It is found only on Fernandina in the Galápagos Islands (part of Ecuador), which it shares with '' N. narboroughi''. Its natural habitat In ecology, habitat refers to the array of resources, biotic factors that are present in an area, such as to support the survival and reproduction of a particular species. A species' habitat can be seen as the physical manifestation of its ... is subtropical or tropical dry shrubland. The conservation status of this endemic species continues to be investigated. References Literature cited *Duff, A. and Lawson, A. 2004. Mammals of the World: A checklist. New Haven, Connecticut: Yale University Press, 312 pp. *Musser, G.G. and Carleton, M.D. 2005. Superfamily Muroidea. Pp. 894–1531 in Wilson, D.E. and Reeder, D.M. (eds.)Mammal Speci ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oryzomyini
Oryzomyini is a tribe of rodents in the subfamily Sigmodontinae of the family Cricetidae. It includes about 120 species in about thirty genera,Weksler et al., 2006, table 1 distributed from the eastern United States to the southernmost parts of South America, including many offshore islands. It is part of the clade Oryzomyalia, which includes most of the South American Sigmodontinae. The name ''Oryzomyini'' derives from that of its type genus, '' Oryzomys'', which means "rice rat" or "rice mouse". Many species are also known as rice rats. Taxonomy Contents of Oryzomyini An oryzomyine group was first envisaged by Oldfield Thomas in the early 20th century. He defined it to include pentalophodont species, which have a mesoloph(id) on the upper and lower molars, with a long palate (extending past the third molars). Thomas included '' Oligoryzomys'', '' Oecomys'', and '' Oryzomys'' (which included many species now in other genera), as well as '' Rhagomys'', which is currently classi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rodent
Rodents (from Latin , 'to gnaw') are mammals of the Order (biology), order Rodentia ( ), which are characterized by a single pair of continuously growing incisors in each of the upper and Mandible, lower jaws. About 40% of all mammal species are rodents. They are native to all major land masses except for Antarctica, and several oceanic islands, though they have subsequently been introduced to most of these land masses by human activity. Rodents are extremely diverse in their ecology and lifestyles and can be found in almost every terrestrial habitat, including human-made environments. Species can be arboreal, fossorial (burrowing), saltatorial/ricochetal (leaping on their hind legs), or semiaquatic. However, all rodents share several morphological features, including having only a single upper and lower pair of ever-growing incisors. Well-known rodents include Mouse, mice, rats, squirrels, prairie dogs, porcupines, beavers, Cavia, guinea pigs, and hamsters. Once included wi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
