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Euryzygomatomys
''Euryzygomatomys'' is a genus of South American rodents, commonly called guiaras, in the family Echimyidae. It contains two extant and one fossil species, found in Argentina, Brazil and Paraguay. They are as follows: * Brandt's guiara (''Euryzygomatomys guiara'') * Fischer's guiara (''Euryzygomatomys spinosus'') * †'' Euryzygomatomys hoffstetteri'' - Tarija Formation, BoliviaTarija at .org Etymology The genus name ''Euryzygomatomys'' derives from the three words (, or ''eury''), meaning "wide, or which extends in width", o ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Euryzygomatomyinae
Euryzygomatinae is a subfamily of rodents, proposed in 2017, and containing three extant genera of spiny Echimyidae: '' Clyomys'', '' Euryzygomatomys'', and '' Trinomys''. Members of this echimyid subfamily all share an origin in the eastern part of Brazil, close to the Atlantic Forest. Morpho-anatomy The teeth of Euryzygomatomyines are characterized by several features: * elongate lower and upper incisor roots ; * five lophids on the lower deciduous premolars 4 ; * either four lophids in ''Trinomys'', or three lophids in ''Clyomys'' and ''Euryzygomatomys'', on the lower molars 1 ; * well-connected lophs on the cheek teeth ; * three molar roots anchoring the upper molars. Their zygomatic arch is reduced with a slightly concave dorsal margin, and the jugal bone is ventrally expanded with much reduced, scarcely salient inferior process. Molecular signatures At the protein level, one amino acid replacement from leucine to proline yields a shared derived character state that i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Euryzygomatomys Spinosus
Fischer's guiara (''Euryzygomatomys spinosus''), is a spiny rat species found in Argentina, Brazil and Paraguay. It is one of only two species in the genus ''Euryzygomatomys''. Its karyotype A karyotype is the general appearance of the complete set of 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 de ... has 2n=46 and FN=88. References Euryzygomatomys Mammals described in 1814 Taxa named by Gotthelf Fischer von Waldheim {{Echimyidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Euryzygomatomys Guiara
Brandt's guiara (''Euryzygomatomys guiara'') is a Brazilian spiny rat species. It was formerly considered conspecific with '' E. spinosus''. References Euryzygomatomys Mammals described in 1835 {{Echimyidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clyomys
''Clyomys'' is a South American rodent genus in the family Echimyidae. It contains two species, found in tropical savannas and grasslands from circa to elevation in central Brazil and eastern Paraguay. The term ''Clyomys'' derives from the two ancient greek words (, or ''clyo''), meaning "to listen, to prick up one's ears", and (), meaning "mouse, rat". The ''Clyomys '' species are as follows: * Broad-headed spiny rat (''Clyomys laticeps'') * † ''Clyomys riograndensis'' Phylogeny ''Clyomys'' is the sister genus to ''Euryzygomatomys''. Both taxa are closely related to the genus ''Trinomys''. In turn, these three genera — forming the clade of Euryzygomatomyinae — share phylogenetic affinities with a clade containing '' Carterodon'' and members of the family Capromyidae. Analyses of craniodental characters proposed that ''Clyomys'' — and also ''Euryzygomatomys'' — may be associated with ''Carterodon''. However, molecular data suggest the polyphyly A polyphy ... [...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: Caluromyi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carterodon
Owl's spiny rat (''Carterodon sulcidens'') is a rodent species in the family Echimyidae found in Brazil. It is the only species in the genus ''Carterodon''. Owl's spiny rat has evolved characteristics such as a heightened ability to dig in open grasslands during times of environmental change.Bezerra, Alexandra & Marinho-Filho, Jader & Carmignotto, Ana. (2011). A review of the distribution, morphology, and habit of the Owl’s Spiny Rat Carterodon sulcidens (Lund, 1841) (Rodentia: Echimyidae). Zoological studies. 50. 566-576. Phylogeny The genus ''Carterodon'' is the sister group to the family Capromyidae (hutias). In turn, this clade shares evolutionary affinities with some genera of spiny rats belonging to the subfamily Euryzygomatomyinae. Analyses of craniodental characters proposed that ''Carterodon'' may be associated with ''Clyomys'' and ''Euryzygomatomys''. However, molecular data suggest the polyphyly A polyphyletic group is an assemblage that includes organisms wi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Echimyidae
Echimyidae is the family of neotropical spiny rats and their fossil relatives. This is the most species-rich family of hystricognath rodents. It is probably also the most ecologically diverse, with members ranging from fully arboreal to terrestrial to fossorial to semiaquatic habits. They presently exist mainly in South America; three members of the family also range into Central America, and the hutias are found in the West Indies in the Caribbean. Species of the extinct subfamily Heteropsomyinae formerly lived on Cuba, Hispaniola, and Puerto Rico in the Antilles. Characteristics In general form, most spiny rats resemble rats, although they are more closely related to guinea pigs and chinchillas. Most species have stiff, pointed hairs, or Spine (zoology), spines, that presumably serve for protection from predators. Many echimyids can Autotomy, break off their tails when attacked. This action may confuse predators long enough for the spiny rat to escape. Unlike the tai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trinomys
The Atlantic spiny rats are all found in the genus ''Trinomys''. They are a group of South American spiny-rats in the family Echimyidae. Extant species of ''Trinomys'' Based on Natureserve.InfoNatura: Animals and Ecosystems of Latin America eb application 2007. Version 5.0 . Arlington, Virginia (USA): NatureServe. Available/ref> The species of spiny rats in the genus ''Trinomys'' are apparently all Brazilian. In particular many of them are endemic to the Atlantic Forest of southeastern Brazil. Not much is known for certain about their ranges however, which still are being investigated, with frequent extensions to the recorded distributions of several species in various ecological classes of forest and dry land. They do not however appear to occur at high altitudes, and several of their ranges appear to be parapatric. Most species of ''Trinomys'' are terrestrial and ambulatory, though ''Trinomys yonenagae'' is unusual that it is semi-fossorial, living in colonial bu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
