NationMaster - Encyclopedia: Eumuroida

Eumuroida is a clade defined in 2004 (Steppan et al.) to describe a group of muroid rodents. The clade is not defined in the standard taxonomic hierarchy, but it is between superfamily and family. A clade is a biological group of species with a common evolutionary ancestor. ... Families see text Muroidea is a large superfamily of rodents. ... Families See Classification Section The order Rodentia is the most numerous of all the branches on the mammal family tree. ... A clade is a biological group of species with a common evolutionary ancestor. ... In biology, a superfamily is a taxonomic grade intermediate between suborder and family. ... Scientific classification or biological classification refers to how biologists group and categorize extinct and living species of organisms. ...

The Eumuroida is technically defined as the clade including all organisms decended from the most recent common ancestor of the Calomyscidae, Nesomyidae, Cricetidae, and Muridae. It specifically excludes the fossorial forms of mouse-like rodents in the family Spalacidae. It is yet to be determined if the Platacanthomyidae belong to the Eumuroida, but Norris et al. (2004) suggested they do not because of subtle features in the skull. A clade is a biological group of species with a common evolutionary ancestor. ... Species see text Mouse-like hamsters are a group of small rodents found in Syria, Azerbaijan, Turkmenistan, Pakistan. ... Subfamilies see text Nesomyidae is a family of rodents in the large and complex superfamily Muroidea. ... Subfamilies see text Cricetidae is a family of rodents in the large and complex superfamily Muroidea. ... Subfamilies See text Muridae is the largest family of mammals. ... Subfamilies see text Spalacidae is a family of rodents in the large and complex superfamily Muroidea. ... Genera see text Platacanthomyinae is the only subfamily in the family Platacanthomyidae. ... A Hippopotamuss skull A skull, or cranium, is a bony structure of vertebrates which serves as the general framework for a head. ...

Norris et al. (2004) noted that two characters can be used to define the Eumuroida: the infraorbital foramen is V-shaped and extends to the roof of the palate, and the incisive foramina are medium to large in size. The zygomatic plate is at least moderately developed in this group, producing the V shape. The common ancestor to the Eumuroida were probably not specialized as burrowing animals, whereas the spalacid ancestor may have been. The palate is the roof of the mouth in humans and vertebrate animals. ...

Jansa and Weksler (2004) noted that the Eumuroid ancestor likely had hamster-like (cricetid) molars as opposed to mouse-like molars (murid). Essentially, the occlusal surface of the molars probably had two rows of cusps (cricetid) instead of three (murid). Genera Cricetus Mesocricetus Cricetulus Phodopus This article is about the animal. ... Subfamilies see text Cricetidae is a family of rodents in the large and complex superfamily Muroidea. ... A molar is the fourth kind of tooth in mammals. ... Feral mouse A mouse is a mammal that belongs to one of numerous species of small rodents in the genus Mus and various related genera of the family MuridÃ¦ (Old World Mice). ... A molar is the fourth kind of tooth in mammals. ... Subfamilies See text Muridae is the largest family of mammals. ... A molar is the fourth kind of tooth in mammals. ...

Early fossil muroids such as cricetodontines represent a possible ancestor to the Eumuroida. These rodents have the cricetid tooth, hence the name: cricetus = hamster + dont = tooth. The presence of these fossils in Eurasia is parsimonious, because most families of eumuroids (except the Nesomyidae) have representatives in Asia. Steppan et al. (2004) suggested that the most recent common ancestor of the Eumuroida lived around the transition between the Oligocene and Miocene. This date only slightly precedes the first appearance of cricetodontines. A fossil Ammonite Fossils are the mineralized remains of animals or plants or other traces such as footprints. ... Families see text Muroidea is a large superfamily of rodents. ... An ancestor is a parent or (recursively) the parent of an ancestor. ... Families See Classification Section The order Rodentia is the most numerous of all the branches on the mammal family tree. ... Genera Cricetus Mesocricetus Cricetulus Phodopus This article is about the animal. ... Types of teeth Molars are used for grinding up foods Carnassials are used for slicing food. ... African-Eurasian aspect of Earth Eurasia is the landmass composed of the continents of Europe and Asia. ... This cladogram shows the relationship among various insect groups. ... The Oligocene epoch is a geologic period of time that extends from about 34 million to 23 million years before the present. ... The Miocene epoch is a period of time that extends from about 23 to 5. ...

Taxonomy

ces"> Species see text Mouse-like hamsters are a group of small rodents found in Syria, Azerbaijan, Turkmenistan, Pakistan. ... Species see text Mouse-like hamsters are a group of small rodents found in Syria, Azerbaijan, Turkmenistan, Pakistan. ... Species see text Mouse-like hamsters are a group of small rodents found in Syria, Azerbaijan, Iran, Turkmenistan, Afghanistan, and Pakistan. ... Subfamilies see text Nesomyidae is a family of rodents in the large and complex superfamily Muroidea. ... Genera Beamys Cricetomys Saccostomus Pouched rats are a group of African rodents in the subfamily Cricetomyinae. ... Genera see text Dendromurinae is a subfamily of rodents in the family Nesomyidae and superfamily Muroidea. ... Species Mystromys albicaudatus The white-tailed rat, Mystromys albicaudatus, also known as the white-tailed mouse, is the only member of the subfamily Mystromyinae in the family Nesomyidae. ... Binomial name Mystromys albicaudatus (Smith, 1834) The White-tailed Rat, Mystromys albicaudatus, also known as the white-tailed mouse, is the only member of the subfamily Mystromyinae in the family Nesomyidae. ... Genera see text The Malagasy rats and mice are the sole members of the subfamily Nesomyinae. ... Genera Petromyscus, Delanymys The subfamily Petromyscinae of the family Nesomyidae contains the rock mice and Delanys swamp mouse. ... Subfamilies see text Cricetidae is a family of rodents in the large and complex superfamily Muroidea. ... Genera see text Arvicolinae is a subfamily of rodents that includes the voles, lemmings, and muskrats. ... Genera Microtus Myodes Phenacomys Lagurus Arvicola A vole is a small rodent resembling a mouse but with a stouter body; a shorter, hairy tail; and smaller ears and eyes. ... Genera Dicrostonyx Lemmus Synaptomys Myopus * Incomplete listing: see vole Lemmings are small rodents, usually found in or near the Arctic. ... Binomial name Ondatra zibethicus (Linnaeus, 1766) The Muskrat or Musquash (Ondatra zibethicus), the only species in genus Ondatra, is a large aquatic rodent native to North America, and introduced in parts of Europe. ... Genera see text This article is about the animal. ... Genera Cricetus Mesocricetus Cricetulus Phodopus This article is about the animal. ... Tribes Baiomyini Neotomini Peromyscini The subfamily Neotominae consists of numerous species of New World rats and mice that are predominantly found in North America. ... Tribes See text The Sigmodontinae is one of the most diverse groups of mammals. ... Subfamilies Neotominae Sigmodontinae Tylomyinae The New World rats and mice are a group of related rodents found in North and South America. ... Genera Otonyctomys Nyctomys Tylomys Ototylomys The subfamily Tylomyinae consists of several species of New World rats and mice including the vesper and climbing rats. ... Subfamilies See text Muridae is the largest family of mammals. ... Genera Acomys Deomys Lophuromys Uranomys The subfamily Deomyinae consists of four genera of mouse-like rodents that were placed in the subfamilies Murinae and Dendromurinae until very recently. ... A gerbil is a small mammal of the order Rodentia. ... A gerbil is a small mammal of the order Rodentia. ... The maned rat (Lophiomys imhausi, also called crested rat) is a long-haired and bushy-tailed East African rodent that resembles a porcupine. ... The maned rat (Lophiomys imhausi, also called crested rat) is a long-haired and bushy-tailed East African rodent that resembles a porcupine. ... Genera see text The Old World rats and mice, part of the subfamily Murinae in the family Muridae, comprise at least 519 species. ... Species 50 species; see text *Several subfamilies of Muroids include animals called rats. ... For the input device, see computer mouse. ...

References

Categories: Rodents | Muroid rodents Families see text Muroidea is a large superfamily of rodents. ... Families See Classification Section The order Rodentia is the most numerous of all the branches on the mammal family tree. ... This stylistic schematic diagram shows a gene in relation to the double helix structure of DNA and to a chromosome (right). ... Classification may refer to: Taxonomic classification See also class (philosophy) Statistical classification Hint: Language use may refer to a taxonomic classification that is used for statistical purposes also as a statistical classification (like International Statistical Classification of Diseases and Related Health Problems). ... Orders Subclass Embrithopoda (extinct) Subclass Creodonta (extinct) Hyaenodontidae Oxyaenidae Subclass Multituberculata (extinct) Plagiaulacida Cimolodonta Subclass Palaeoryctoides (extinct) Subclass Triconodonta (extinct) Subclass Placentalia Afrosoricida Artiodactyla Carnivora Cetacea Chiroptera Dermoptera Desmostylia (extinct) Hyracoidea Insectivora Lagomorpha Macroscelidea Perissodactyla Pholidota Primates Proboscidea Rodentia Scandentia Sirenia Tubulidentata Xenarthra Subclass Marsupialia Dasyuromorphia Didelphimorphia Diprotodontia Microbiotheria Notoryctemorphia... In biology, the most commonly used definition of species was first coined by Ernst Mayr. ... Orders Subclass Embrithopoda (extinct) Subclass Creodonta (extinct) Hyaenodontidae Oxyaenidae Subclass Multituberculata (extinct) Plagiaulacida Cimolodonta Subclass Palaeoryctoides (extinct) Subclass Triconodonta (extinct) Subclass Placentalia Afrosoricida Artiodactyla Carnivora Cetacea Chiroptera Dermoptera Desmostylia (extinct) Hyracoidea Insectivora Lagomorpha Macroscelidea Perissodactyla Pholidota Primates Proboscidea Rodentia Scandentia Sirenia Tubulidentata Xenarthra Subclass Marsupialia Dasyuromorphia Didelphimorphia Diprotodontia Microbiotheria Notoryctemorphia... In biology, Phylogenetics (Greek: phylon = race and genetic = birth) is the taxonomical classification of organisms based on how closely they are related in terms of evolutionary differences. ... Families see text Muroidea is a large superfamily of rodents. ... Families See Classification Section The order Rodentia is the most numerous of all the branches on the mammal family tree. ... Genera see text Zokors are Asiatic burrowing rodents resembling mole rats. ... Genera see text Zokors are Asiatic burrowing rodents resembling mole rats. ... Families see text Muroidea is a large superfamily of rodents. ... Families Many, see text The order Rodentia is the most numerous of all the branches on the mammal family tree. ... In biology, Phylogenetics (Greek: phylon = race and genetic = birth) is the taxonomical classification of organisms based on how closely they are related in terms of evolutionary differences. ... Families see text Muroidea is a large superfamily of rodents. ... Families See Classification Section The order Rodentia is the most numerous of all the branches on the mammal family tree. ... This stylistic schematic diagram shows a gene in relation to the double helix structure of DNA and to a chromosome (right). ...