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Placentalia and Eutheria are terms used to describe major groupings within the animal class of Mammalia. The two terms are almost synonymous, although Eutheria has a slightly wider scope: It includes all Placentals as well as the extinct ancestors of modern placentals. A zorse. ...
A zorse A zorse is the offspring of a zebra stallion and a horse mare. ...
Scientific classification or biological classification is how biologists group and categorize extinct and living species of organisms. ...
Phyla Porifera (sponges) Ctenophora (comb jellies) Cnidaria (coral, jellyfish, anenomes) Placozoa {trichoplax) Subregnum Bilateria (bilateral symmetry) Acoelomorpha (basal) Orthonectida (flatworms, echinoderms, etc. ...
Typical Classes Subphylum Urochordata - Tunicatas Ascidiacea Thaliacea Larvacea Subphylum Cephalochordata - Lancelets Subphylum Myxini - Hagfishes Subphylum Vertebrata - Vertebrates Petromyzontida - Lampreys Placodermi (extinct) Chondrichthyes - Cartilaginous fishes Acanthodii (extinct) Actinopterygii - Ray-finned fishes Actinistia - Coelacanths Dipnoi - Lungfishes Amphibia - Amphibians Reptilia - Reptiles Aves - Birds Mammalia - Mammals Chordates (phylum Chordata) include the vertebrates, together with...
Groups Conodonta Hyperoartia Petromyzontidae (lampreys) Pteraspidomorphi (early jawless fish) Thelodonti Anaspida Cephalaspidomorphi (early jawless fish) Galeaspida Pituriaspida Osteostraci Gnathostomata (jawed vertebrates) Placodermi Chondrichthyes (cartilaginous fish) Acanthodii Osteichthyes (bony fish) Actinopterygii (ray-finned fish) Sarcopterygii (lobe-finned fish) Actinistia (coelacanths) Dipnoi (lungfish) Tetrapoda Amphibia Amniota Sauropsida/(Reptiles) Aves (Birds) Synapsida Mammalia...
Orders Subclass Multituberculata (extinct) Plagiaulacida Cimolodonta Subclass Palaeoryctoides (extinct) Subclass Triconodonta (extinct) Subclass Placentalia Afrosoricida Artiodactyla Carnivora Cetacea Chiroptera Cimolesta (extinct) Creodonta (extinct) Condylarthra (extinct) Dermoptera Desmostylia (extinct) Embrithopoda (extinct) Hyracoidea Insectivora Lagomorpha Litopterna (extinct) Macroscelidea Mesonychia (extinct) Notoungulata (extinct) Perissodactyla Pholidota Plesiadapiformes (extinct) Primates Proboscidea Rodentia Scandentia Sirenia Taeniodonta...
Sir Richard Owen and Dinornis bird skeleton Sir Richard Owen (July 20, 1804 - December 18, 1892) was an English biologist, comparative anatomist and palaeontologist. ...
Families Myrmecophagidae Megalonychidae Bradypodidae Dasypodidae The order Xenarthra is a group of placental mammals, extant today only in the Americas. ...
Genera Chlamyphorus Cabassous Chaetophractus Dasypus Euphractus Priodontes Tolypeutes Zaedyus This page is about the animal. ...
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 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. ...
This article is about the mammal. ...
Genera Procavia Heterohyrax Dendrohyrax A hyrax is any of about 11 species of fairly small, thickset, herbivorous mammals in the order Hyracoidea. ...
Groups Jozaria (extinct) Anthracobunidae (extinct) Moeritheriidae (extinct) Euproboscidea Numidotheriidae (extinct) Barytheriidae (extinct) Deinotheriidae (extinct) Elephantiformes Phiomiidae (extinct) Palaeomastodontidae (extinct) Hemimastodontidae (extinct) Mammutidea (extinct) Euelephantoidea Choerolophodontidae (extinct) Amebelodontidae (extinct) Gnathabelodontidae (extinct) Gomphotheriidae (extinct) Elephantidae For the plant genus Proboscidea see, Unicorn plant Proboscidea is an order containing only one family of...
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. ...
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. ...
This article is about mammals. ...
Families Erinaceidae Soricidae Talpidae Solenodontidae The biological order Insectivora in the past was used as a scrapbasket for a variety of small to very small, relatively unspecialized, insectivorous mammals. ...
Suborders Mysticeti Odontoceti (see text for families) The order Cetacea includes whales, dolphins and porpoises. ...
Families Suidae Hippopotamidae Tayassuidae Camelidae Tragulidae Moschidae Cervidae Giraffidae Antilocapridae Bovidae The even-toed ungulates form the mammal order Artiodactyla. ...
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. ...
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 Ailuridae Amphicyonidae †Canidae Felidae Herpestidae Hyaenidae Mephitidae Miacidae †Mustelidae Nandiniidae Nimravidae †Odobenidae Otariidae Phocidae Procyonidae Ursidae Viverravidae †Viverridae The diverse order Carnivora includes over 260 placental mammals. ...
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. ...
Families Many, see text The order Rodentia is the most numerous of all the branches on the mammal family tree. ...
Families Leporidae Ochotonidae The Lagomorphs, order Lagomorpha, are an order of mammals of which there are two families, Leporidae (hares and rabbits), and Ochotonidae (pikas). ...
Species Cynocephalus varigatus Cynocephalus volans Colugos are arboreal gliding mammals found in South-east Asia. ...
Genera Tupaia Anathana Urogale Dendrogale Lyonogale Ptilocercus The tree shrews are small, squirrel-like mammals native to the tropical forests of South-east Asia. ...
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. ...
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). ...
Scientific classification or biological classification refers to how biologists group and categorize extinct and living species of organisms. ...
Orders Subclass Multituberculata (extinct) Plagiaulacida Cimolodonta Subclass Palaeoryctoides (extinct) Subclass Triconodonta (extinct) Subclass Placentalia Afrosoricida Artiodactyla Carnivora Cetacea Chiroptera Cimolesta (extinct) Creodonta (extinct) Condylarthra (extinct) Dermoptera Desmostylia (extinct) Embrithopoda (extinct) Hyracoidea Insectivora Lagomorpha Litopterna (extinct) Macroscelidea Mesonychia (extinct) Notoungulata (extinct) Perissodactyla Pholidota Plesiadapiformes (extinct) Primates Proboscidea Rodentia Scandentia Sirenia Taeniodonta...
The majority of living mammals are placental: the other two extant groups are the Monotremata and the Marsupialia; there are other groups of extinct mammals. The Placentalia are distinguished from other mammals in that the fetus is nourished during gestation via a placenta while, in general, this is not the case with other mammals (Bandicoots are a conspicuous exception to this rule). They reproduce sexually, and the "child" is carried in the mother until fully developed. Placental mammals are viviparous. Some examples of Placental Mammals are simians and leopards. Only females carry a placenta. They live in many areas of the world including the Americas, and parts of Asia. Orders Subclass Multituberculata (extinct) Plagiaulacida Cimolodonta Subclass Palaeoryctoides (extinct) Subclass Triconodonta (extinct) Subclass Placentalia Afrosoricida Artiodactyla Carnivora Cetacea Chiroptera Cimolesta (extinct) Creodonta (extinct) Condylarthra (extinct) Dermoptera Desmostylia (extinct) Embrithopoda (extinct) Hyracoidea Insectivora Lagomorpha Litopterna (extinct) Macroscelidea Mesonychia (extinct) Notoungulata (extinct) Perissodactyla Pholidota Plesiadapiformes (extinct) Primates Proboscidea Rodentia Scandentia Sirenia Taeniodonta...
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. ...
Fetus at eight weeks Foetus redirects here. ...
Gestation is the carrying of an embryo or fetus inside a female viviparous animal. ...
Human placenta shown a few minutes after birth. ...
Genera Perameles Isoodon Chaeropus A bandicoot is any of about 8 species of small to medium-sized, terrestrial marsupial omnivores in the subfamily Peramelinae (the true bandicoots) of the family Peramelidae; or in a broader sense, any of about 21 species of fairly similar animals in the order Peramelemorphia. ...
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. ...
Families Cebidae Aotidae Pitheciidae Atelidae Cercopithecidae Hylobatidae Hominidae The simians (infraorder Simiiformes) are the higher primates very common to most people: the monkeys and the apes, including humans. ...
Binomial name Panthera pardus (Linnaeus, 1758) Leopards (Panthera pardus) are one of the four big cats of the genus Panthera. ...
The Americas (sometimes referred to as America) is the area including the land mass located between the Pacific Ocean and the Atlantic Ocean, generally divided into North America and South America. ...
World map showing Asia (geographically) Asia is the central and eastern part of Eurasia and worlds largest continent. ...
The earliest known Placentalia species is Eomaia from the Lower Cretaceous of China. It is undoubtably a member of Placentalia, but the hips of the animal are too narrowly built to have allowed the birth of well-developed young. This strongly suggests that a placenta played little role in the development of young. 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 (about 146 MYA) to the beginning of the Paleocene epoch of the Tertiary period (65. ...
Monodelphia was Cuvier's original name for the group which includes all the orders of mammals except the Marsupials and Monotremes. Georges Cuvier Baron Georges Leopold Chretien Frédéric Dagobert Cuvier (August 23, 1769 - May 13, 1832) was a French naturalist, He was born at Montbéliard (then Mömpelgard in Württemberg) under the name of Johann Leopold Nicolaus Friedrich Kuefer, and was the son of a retired officer...
References
Wikibooks has a Dichotomous Key related to this taxon: Placentalia - McKenna MC & Bell SK, (1997), Classification of Mammals Above the Species Level. Columbia University Press.
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