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Mountain Viscacha Rat
The mountain viscacha rat or mountain vizcacha rat (''Octomys mimax''), historically viscacha rat or vizcacha rat, is a species of rodent in the family Octodontidae. It is endemic to Argentina. It is the only living species within the genus ''Octomys''. This diploid genus (2n = 56) may be ancestral to the two unusual suspected tetraploid species '' Tympanoctomys barrerae'' and '' Pipanacoctomys aureus''. However, some genetic studies have rejected any polyploidism in mammals as unlikely, and suggests that ''amplification and dispersion of repetitive sequences best explain the large genome size''. Description The mountain viscacha rat is a rat-like animal with a head-body length of about and weighing from . The feet are relatively long, while the tail measures . It has light brown fur with white underparts and a bushy tail. Unusual features of the viscacha rat include greatly enlarged auditory bullae, and the presence of numerous whiskers on the roof of the mouth behind t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Viscacha Rat (other)
Viscacha rats are a group of rodents in the family Octodontidae. All species are found in Argentina. They are placed in the following genera: *Genus ''Octomys'' ** ''O. mimax '', mountain viscacha rat, found in the Andes *Genus ''Pipanacoctomys'' ** ''P. aureus'', the golden viscacha rat, found near a salt flat *Genus ''Tympanoctomys'' (4 species, 3 extant), found in desert shrubland near salt flats ** ''T. barrerae'', the plains viscacha rat ** ''T. kirchnerorum'', Kirchner's viscacha rat, ** ''T. loschalchalerosorum'', the Chalchalero viscacha rat The Chalchalero viscacha rat or Chalchalero vizcacha rat (''Tympanoctomys loschalchalerosorum'') is a species of caviomorph rodent in the family Octodontidae. It was formerly considered to be monotypic within the genus ''Salinoctomys'', but ha ... ** †'' T. cordubensis'' {{disambiguation Rodents Animal common name disambiguation pages ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
San Luis Province
San Luis () is a province of Argentina located near the geographical center of the country (on the 32° South parallel). Neighboring provinces are, from the north clockwise, La Rioja, Córdoba, La Pampa, Mendoza and San Juan. History The city of San Luis was founded in 1594 by Luis Jufré de Loaysa y Meneses, but was subsequently abandoned. It was refounded by Martín García Óñez de Loyola in 1596 under the name ''San Luis de Loyola''. Since the return of Argentina to democratic rule in 1983, in particular, the Rodríguez Saá family (of Peronist affiliation) has occupied the governor's seat. Governor (now Senator) Adolfo Rodríguez Saá has overseen investment by light manufacturers (mostly food-processors and bottling plants) and advances like the construction of Argentina's most extensive expressway network. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxa Named By Oldfield Thomas
In biology, a taxon ( back-formation from '' taxonomy''; plural taxa) is a group of one or more populations of an organism or organisms seen by taxonomists to form a unit. Although neither is required, a taxon is usually known by a particular name and given a particular ranking, especially if and when it is accepted or becomes established. It is very common, however, for taxonomists to remain at odds over what belongs to a taxon and the criteria used for inclusion. If a taxon is given a formal scientific name, its use is then governed by one of the nomenclature codes specifying which scientific name is correct for a particular grouping. Initial attempts at classifying and ordering organisms (plants and animals) were set forth in Carl Linnaeus's system in ''Systema Naturae'', 10th edition (1758), as well as an unpublished work by Bernard and Antoine Laurent de Jussieu. The idea of a unit-based system of biological classification was first made widely available in 1805 in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mammals Described In 1920
Mammals () are a group of vertebrate animals constituting the class Mammalia (), characterized by the presence of mammary glands which in females produce milk for feeding (nursing) their young, a neocortex (a region of the brain), fur or hair, and three middle ear bones. These characteristics distinguish them from reptiles (including birds) from which they diverged in the Carboniferous, over 300 million years ago. Around 6,400 extant species of mammals have been described divided into 29 orders. The largest orders, in terms of number of species, are the rodents, bats, and Eulipotyphla (hedgehogs, moles, shrews, and others). The next three are the Primates (including humans, apes, monkeys, and others), the Artiodactyla (cetaceans and even-toed ungulates), and the Carnivora (cats, dogs, seals, and others). In terms of cladistics, which reflects evolutionary history, mammals are the only living members of the Synapsida (synapsids); this clade, together with Saur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mammals Of Argentina
This is a list of the native mammal species recorded in Argentina. As of January 2020, the list contains 402 mammal species from Argentina, of which one is extinct, seven are critically endangered, seventeen are endangered, sixteen are vulnerable, and thirty are near threatened. The following tags are used to highlight each species' conservation status as assessed by the International Union for Conservation of Nature; those on the left are used here, those in the second column in some other articles: Subclass: Theria Infraclass: Metatheria Superorder: Ameridelphia =Order: Didelphimorphia (common opossums)= ---- Didelphimorphia is the order of common opossums of the Western Hemisphere. Opossums probably diverged from the basic South American marsupials in the late Cretaceous or early Paleocene. They are small to medium-sized marsupials, about the size of a large house cat, with a long snout and prehensile tail. *Family: Didelphidae (American opossums) **Subfamily: ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mammals Of Chile
Mammals () are a group of vertebrate animals constituting the class Mammalia (), characterized by the presence of mammary glands which in females produce milk for feeding (nursing) their young, a neocortex (a region of the brain), fur or hair, and three middle ear bones. These characteristics distinguish them from reptiles (including birds) from which they diverged in the Carboniferous, over 300 million years ago. Around 6,400 extant species of mammals have been described divided into 29 orders. The largest orders, in terms of number of species, are the rodents, bats, and Eulipotyphla (hedgehogs, moles, shrews, and others). The next three are the Primates (including humans, apes, monkeys, and others), the Artiodactyla (cetaceans and even-toed ungulates), and the Carnivora (cats, dogs, seals, and others). In terms of cladistics, which reflects evolutionary history, mammals are the only living members of the Synapsida (synapsids); this clade, together with Sauropsida ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boxthorn
''Lycium'' is a genus of flowering plants in the nightshade family, Solanaceae. The genus has a disjunct distribution around the globe, with species occurring on most continents in temperate and subtropical regions. South America has the most species, followed by North America and southern Africa. There are several scattered across Europe and Asia, and one is native to Australia.Fukuda, T., et al. (2001)Phylogeny and biogeography of the genus ''Lycium'' (Solanaceae): Inferences from chloroplast DNA sequences. ''Molecular Phylogenetics and Evolution'' 19(2), 246-58. Common English names for plants of this genus include box-thorn''Lycium''. The Jepson eFlora 2013. and desert-thorn. There are about 70 to 80 [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maytenus
''Maytenus'' ''Sunset Western Garden Book,'' 1995:606–607 is a genus of flowering plants in the family Celastraceae. Members of the genus are distributed throughout Central and South America, Southeast Asia, Micronesia and Australasia, the Indian Ocean and Africa. They grow in a very wide variety of climates, from tropical to subpolar. The traditional circumscription of ''Maytenus'' is paraphyletic, so many species have been transferred to '' Denhamia'', ''Gymnosporia'', '' Monteverdia'', and ''Tricerma''. Selected species * '' Maytenus abbottii'' A.E.van Wyk * '' Maytenus acuminata'' (L.f.) Loes. * ''Maytenus boaria'' Molina (type species) * '' Maytenus buxifolia'' (A.Rich.) Griseb. (West Indies) * '' Maytenus canariensis'' (Loes.) G. Kunkel & Sunding * '' Maytenus curtissii'' (King) Ding Hou * '' Maytenus hookeri'' Loes. * '' Maytenus jamesonii'' Briq. * '' Maytenus lucidus'' * '' Maytenus magellanica'' ( Lam.) Hook.f. * '' Maytenus obtusifolia'' * '' Maytenus octogona'' * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cressa (plant)
''Cressa'' is a genus of plants in the morning glory family known generally as alkaliweeds. These plants are native to the tropical and subtropical areas of the world. They are clumpy and low-growing but usually have erect stems covered white-haired, green leaves. They produce tiny white flowers about half a centimeter across. There are four species recognised in the genus ''Cressa'':Austin, D. F. (2000)A revision of ''Cressa'' L.(Convolvulaceae).''Botanical Journal of the Linnean Society'' 133(1), 27-39. *''Cressa australis'' *''Cressa cretica'' *''Cressa nudicaulis'' *''Cressa truxillensis ''Cressa truxillensis'' is a species of flowering plant in the morning glory family known by the common name spreading alkaliweed. It is native to the western United States and Mexico, where it grows in habitat with saline or alkaline soils, suc ...'' Sources External linksJepson Manual Treatment Convolvulaceae Convolvulaceae genera {{Solanales-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Capparis
''Capparis'' is a flowering plant genus, comprising around 250 species in the family Capparaceae which is included in the Brassicaceae in the unrevised APG II system. These plants are shrubs or lianas and are collectively known as caper shrubs or caperbushes. ''Capparis'' species occur over a wide range of habitat in the subtropical and tropical zones. Plant description The leaves are simple, entire and rarely reduced. Flowers are bisexual, bracteates, axillary or supra-axillary, solitary or in rows, in racemes or umbels. Sepals and petals are 4 in number and are free. Stamens are many, ovary on a gynophore, 1-celled. Fruit is a berry, globose or ellipsoid. ''C. zeylanica'' L. ''C. zeylanica'' L. is a climbing or straggling shrub with tomentose branches. Branches are armed with recurved stipular spines. It grows naturally along the hedges. Leaves are ovate-elliptic. Flowers are 35– 50 mm across, white, fading to pink ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prosopis
''Prosopis'' is a genus of flowering plants in the family Fabaceae. It contains around 45 species of spiny trees and shrubs found in subtropical and tropical regions of the Americas, Africa, Western Asia, and South Asia. They often thrive in arid soil and are resistant to drought, on occasion developing extremely deep root systems. Their wood is usually hard, dense and durable. Their fruits are pods and may contain large amounts of sugar. The generic name means " burdock" in late Latin and originated in the Greek language. Selected species *Mesquites (southern United States, Mexico) ** '' Prosopis glandulosa'' Torr. – honey mesquite; ''Haas'' ( Cmiique Iitom) ** '' Prosopis laevigata'' (Humb. & Bonpl. ex Willd.) M.C.Johnst. – smooth mesquite ** ''Prosopis pubescens'' Benth. – screwbean mesquite ** '' Prosopis reptans'' Benth. – tornillo ** '' Prosopis velutina'' Wooton – velvet mesquite *"Algarrobos", bayahondas etc. (Neotropics, particularly ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cactus
A cactus (, or less commonly, cactus) is a member of the plant family Cactaceae, a family comprising about 127 genera with some 1750 known species of the order Caryophyllales. The word ''cactus'' derives, through Latin, from the Ancient Greek word (''káktos''), a name originally used by Theophrastus for a spiny plant whose identity is now not certain. Cacti occur in a wide range of shapes and sizes. Although some species live in quite humid environments, most cacti live in habitats subject to at least some drought. Many live in extremely dry environments, even being found in the Atacama Desert, one of the driest places on Earth. Because of this, cacti show many adaptations to conserve water. For example, almost all cacti are succulents, meaning they have thickened, fleshy parts adapted to store water. Unlike many other succulents, the stem is the only part of most cacti where this vital process takes place. Most species of cacti have lost true leaves, retaining only spin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
