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Encyclopedia > Eutheria
Placental mammals/Eutheria
Fossil range: Middle Cretaceous - Recent
House Mouse, Mus musculus
House Mouse, Mus musculus
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Subclass: Theria
Infraclass: Eutheria
Orders[1]

Eutheria[2] is a taxon containing the placental mammals, such as humans. The sister group of Eutheria is Metatheria, which includes marsupials and their extinct relatives. Image File history File links Circle-question-red. ... Image File history File links This is a lossless scalable vector image. ... // The Cretaceous Period is one of the major divisions of the geologic timescale, reaching from the end of the Jurassic Period (i. ... Wikipedia does not have an article with this exact name. ... Binomial name Linnaeus, 1758 The common House Mouse (Mus musculus) is one of the most numerous species of the genus Mus equivalent to the common term mouse. ... Scientific classification or biological classification is a method by which biologists group and categorize species of organisms. ... For other uses, see Animal (disambiguation). ... Typical Classes See below Chordates (phylum Chordata) are a group of animals that includes the vertebrates, together with several closely related invertebrates. ... Subclasses & Infraclasses Subclass †Allotheria* Subclass Prototheria Subclass Theria Infraclass †Trituberculata Infraclass Metatheria Infraclass Eutheria Mammals (class Mammalia) are warm-blooded, vertebrate animals characterized by the production of milk in female mammary glands and by the presence of: hair, three middle ear bones used in hearing, and a neocortex region in... Infraclasses Metatheria Eutheria This article is about the subclass of mammals. ... Eomaia scansoria (dawn mother) is a recently discovered extinct mammal that may be one of the earliest ancestors of the eutheria yet to have been found. ... Binomial name Wible , 2007 Maelestes gobiensis is a species of prehistoric shrew-like mammal discovered in 1997 in the Gobi Desert. ... Orders Superorder Xenarthra: Pilosa Cingulata Infraclass Epitheria: Superorder Afrotheria: Afrosoricida (Golden mole and tenrec) Macroscelidea (Elephant shrew) Tubulidentata (Aardvark) Hyracoidea (Hyrax) Proboscidea (Elephant) Sirenia (Manatee, Dugong) Superorder Laurasiatheria: Chiroptera (Bats) Insectivora (Shrews, Moles) Cetacea (Whale, dolphin) Artiodactyla (Ruminants et al) Perissodactyla(Horse et al. ... Orders and suborders Order Pilosa Suborder Vermilingua Suborder Folivora Order Cingulata See text for more details The superorder Xenarthra is a group of placental mammals (infraclass Eutheria), extant today only in the Americas. ... Genera Chlamyphorus Cabassous Chaetophractus Dasypus Euphractus Priodontes Tolypeutes Zaedyus This page is about the animal. ... Families Bradypodidae Megalonychidae Cyclopedidae Myrmecophagidae The order Pilosa is a group of placental mammals, extant today only in the Americas. ... Afrotheria are a clade of mammals with the rank of cohort, that has been proposed based on DNA analysis. ... Families  Chrysochloridae  Tenrecidae The order Afrosoricida (also known as Tenrecomorpha) contains two families of small mammals that are possibly a part of the traditional order Insectivora. ... Genera  Procavia  Heterohyrax  Dendrohyrax A hyrax is any of about 11 species of fairly small, thickset, herbivorous mammals in the order Hyracoidea. ... Genera  Rhynchocyon  Petrodromus  Macroscelides  Elephantulus The small insectivorous mammals endemic to Africa known as elephant shrews are neither elephants nor shrews and, more formally, are the members of the biological order Macroscelidea. ... Groups Jozaria (extinct) Anthracobunidae (extinct) Moeritheriidae (extinct) Euproboscidea Numidotheriidae (extinct) Barytheriidae (extinct) Deinotheriidae (extinct) Elephantiformes Phiomiidae (extinct) Palaeomastodontidae (extinct) Hemimastodontidae (extinct) Euelephantoidea Choerolophodontidae (extinct) Amebelodontidae (extinct) Gnathabelodontidae (extinct) Gomphotheriidae (extinct) Elephantidae Mammutidae (extinct) Proboscidea is an order containing only one family of living animals, Elephantidae, the elephants, with three species... Families Dugongidae Trichechidae Hydrochichus (extinct) For information about the Gothic metal band, see Sirenia (band) The Sirenia are fully aquatic, herbivorous mammals that inhabit rivers, estuaries and coastal marine waters. ... This article is about the mammal. ... Orders Glires Rodentia Lagomorpha Euarchonta Dermoptera Scandentia Primates The Euarchontoglires are a mammalian superorder based on molecular genetic research, combining the Glires clade, which consists of the Rodentia and the Lagomorpha, with that of the Euarchonta, a clade consisting of the Scandentia, the Primates and the Dermoptera. ... Species  Cynocephalus varigatus  Cynocephalus volans Colugos are arboreal gliding mammals found in South-east Asia. ... Families Leporidae Ochotonidae Prolagidae (extinct) The Lagomorphs, order Lagomorpha, are an order of mammals of which there are two families, Leporidae (hares and rabbits), and Ochotonidae (pikas). ... For the ecclesiastical use of this term, see primate (religion) Families 13, See classification A primate is any member of the biological order Primates, the group that contains all lemurs, monkeys, and apes, including humans. ... Suborders Sciuromorpha Castorimorpha Myomorpha Anomaluromorpha Hystricomorpha Rodentia is an order of mammals also known as rodents. ... Genera Tupaia Anathana Urogale Dendrogale Lyonogale Ptilocercus The tree shrews are small, squirrel-like mammals native to the tropical forests of South-east Asia. ... Laurasiatheria is a proposed clade with the rank of cohort or super-order, of the Epitheria infraclass of the Placentalia (living) or Eutheria (Placentals and their extinct ancestors) subclass of Mammals, based on molecular and DNA research It is a sister group to Euarchontoglires. ... Families 17, See classification The diverse order Carnivora (IPA: or ; from Latin carō (stem carn-) flesh, + vorāre to devour) includes over 260 species of placental mammals. ... Orders Order Cetacea Order Artiodactyla Humpback Whale breaching. ... This article is about mammals. ... Subfamilies & Genera Erinaceinae Atelerix Erinaceus Hemiechinus Mesechinus Paraechinus Galericinae Echinosorex Hylomys Neohylomys Neotetracus Podogymnura Erinaceidae is the only family in the order of the Erinaceomorpha. ... Species Manis gigantea Manis temmincki Manis tricuspis Manis tetradactyla Manis crassicaudata Manis pentadactyla Manis javanica Pangolins are mammals with large scales on their skins which can be found in parts of Africa and Asia. ... Families Nesophontidae Solenodontidae Soricidae Talpidae The order Soricomorpha is a biological clade within the class of mammals. ... Families Equidae Tapiridae Rhinocerotidae The odd-toed ungulates or Perissodactyla are large to very large browsing and grazing mammals with relatively simple stomachs and a large middle toe. ... A taxon (plural taxa), or taxonomic unit, is a grouping of organisms (named or unnamed). ... The placenta is an ephemeral (temporary) organ present in female placental vertebrates during gestation (pregnancy), but a placenta has evolved independently also in other animals as well, for instance scorpions and velvet worms. ... Subclasses & Infraclasses Subclass †Allotheria* Subclass Prototheria Subclass Theria Infraclass †Trituberculata Infraclass Metatheria Infraclass Eutheria Mammals (class Mammalia) are warm-blooded, vertebrate animals characterized by the production of milk in female mammary glands and by the presence of: hair, three middle ear bones used in hearing, and a neocortex region in... This article is about modern humans. ... This cladogram shows the relationship among various insect groups. ... Metatheria is a grouping within the animal class Mammalia. ... Orders Superorder Ameridelphia Didelphimorphia Paucituberculata Superorder Australidelphia Microbiotheria Dasyuromorphia Peramelemorphia Notoryctemorphia Diprotodontia Marsupials are mammals in which the female typically has a pouch (called the marsupium, from which the name Marsupial derives) in which it rears its young through early infancy. ...


The name Eutheria comes from the Greek words eu- "well-developed" and ther "beast". When Eutheria was introduced by Thomas Henry Huxley in 1880, he meant for it to be more broad in definition than its precursor Placentalia. Some use Eutheria as a total group which includes the crown group Placentalia and extinct mammals which are closer to Placentalia than to Marsupialia. Thomas Huxley Thomas Henry Huxley F.R.S. (May 4, 1825 – June 29, 1895) was a British biologist, known as Darwins Bulldog for his defence of Charles Darwins theory of evolution. ... Year 1880 (MDCCCLXXX) was a leap year starting on Thursday (link will display the full calendar) of the Gregorian calendar (or a leap year starting on Tuesday of the 12-day slower Julian calendar). ... Total group (also total clade, stem clade, or panstem clade) is a term used in systematics to refer to a crown clade plus its stem group. ... A crown group is a living monophyletic group or clade, consisting of the last common ancestor of all living examples, plus all of its descendants. ... Orders Superorder Ameridelphia Didelphimorphia Paucituberculata Superorder Australidelphia Microbiotheria Dasyuromorphia Peramelemorphia Notoryctemorphia Diprotodontia Marsupials are mammals in which the female typically has a pouch (called the marsupium, from which the name Marsupial derives) in which it rears its young through early infancy. ...


Nevertheless, all Eutherians are placental mammals. This means that a Eutherian fetus is nourished during gestation by a placenta. Eutherians are also viviparous, meaning that the offspring are carried in the mother's womb until fully developed. “Unborn child” redirects here. ... The placenta is an ephemeral (temporary) organ present in female placental vertebrates during gestation (pregnancy), but a placenta has evolved independently also in other animals as well, for instance scorpions and velvet worms. ... A viviparous animal is an animal employing vivipary, a method of reproduction in which the embryo develops inside the body of the mother from which it gains nourishment, and not from an egg. ... The womb is the major female reproductive organ of most mammals, including humans. ...


Because of this, Eutherians are different from other mammal groups such as monotremes and marsupials which are not placental. Monotremes, for instance, lay eggs which protect developing young until they are fully developed. Marsupials give birth to partially-developed young who then migrate to a special pouch in the mother's body in which the young continue their development. (Some exceptions do exist. Bandicoots for instance, which are marsupials, develop small placenta-like structures during gestation.) Families Kollikodontidae (extinct) Ornithorhynchidae - Platypus Tachyglossidae - Echidnas Steropodontidae (extinct) Monotremes are mammals that are best known for laying eggs, instead of giving birth to live young like marsupials and placental mammals (Eutheria). ... Orders Superorder Ameridelphia Didelphimorphia Paucituberculata Superorder Australidelphia Microbiotheria Dasyuromorphia Peramelemorphia Notoryctemorphia Diprotodontia Marsupials are mammals in which the female typically has a pouch (called the marsupium, from which the name Marsupial derives) in which it rears its young through early infancy. ... In most birds and reptiles, an egg (Latin ovum) is the zygote, resulting from fertilization of the ovum. ... Kangaroo Joey inside the pouch The pouch is a distinguishing feature of marsupials; the name marsupial is derived from the Latin marsupium, meaning pouch. ... Genera  Perameles  Isoodon  Chaeropus A bandicoot is any of about 8 species of small to medium-sized, terrestrial New Guinea and far-northern Australia are distinct from all other bandicoots, and these remain within the order but are now grouped together in the separate family Peroryctidae. ...


The earliest known eutherian species is the extinct Eomaia scansoria from the Lower Cretaceous of China. It is undoubtedly a member of Eutheria, but the hips of the animal were too narrowly built to have allowed the birth of well-developed young. Thus it is unlikely that a placenta greatly contributed to the development of Eomaia scansoria's young before they were born. Eomaia scansoria (dawn mother) is a recently discovered extinct mammal that may be one of the earliest ancestors of the eutheria yet to have been found. ... // The Cretaceous Period is one of the major divisions of the geologic timescale, reaching from the end of the Jurassic Period (i. ...


Members of Eutheria are found on all continents and in all oceans.


See also

The class Mammalia (the Mammals) is divided into two subclasses based on reproductive techniques: egg laying mammals (the Monotremes); and mammals which give live birth. ... Subclasses & Infraclasses Subclass †Allotheria* Subclass Prototheria Subclass Theria Infraclass †Trituberculata Infraclass Metatheria Infraclass Eutheria Mammals (class Mammalia) are warm-blooded, vertebrate animals characterized by the production of milk in female mammary glands and by the presence of: hair, three middle ear bones used in hearing, and a neocortex region in... Infraclasses Metatheria Eutheria This article is about the subclass of mammals. ...

Compare and contrast

Wikispecies has information related to:
Eutheria

Metatheria is a grouping within the animal class Mammalia. ... Prototheria (próto-thiŕ ee-a) (Gr. ... GFDL Wikispecies logo File links The following pages link to this file: Solanaceae Species Asterias Homo (genus) Human Wikipedia:Template messages/Links Wikipedia:Template messages/All Homo floresiensis User talk:Tuneguru Template:Wikispecies Categories: GFDL images ... Wikispecies is a sister project supported by the Wikimedia Foundation that anybody can edit with a great potential use to students and researchers. ...

Notes and references

  1. ^ Eutheria phylogeny. Mikko's Phylogeny Archive. Retrieved on 2006-03-08.
  2. ^ Today Placentalia and Eutheria are sometimes considered to be the same group. But there are proposals of classification (McKenna & Bell, 1997) that differentiate between the two groups.

  Results from FactBites:
 
Eutheria - Wikipedia, the free encyclopedia (127 words)
Eutheria is a taxon (specifically, an infraclass) nearly synonymous with Placentalia, containing the placental mammals and the nearest ancestors of placental mammals (which are known only from the fossil record).
The closest living relatives of the eutheres are part of the subclass Marsupialia.
When Eutheria was introduced by Thomas Henry Huxley in 1880, he meant for it to be more broad in definition than its precursor Placentalia.
  More results at FactBites »

 
 

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