Marsupial and Metatheria

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Difference between Marsupial and Metatheria

Marsupial vs. Metatheria

Marsupials are any members of the mammalian infraclass Marsupialia. Metatheria is a mammalian clade that includes all mammals more closely related to marsupials than to placentals.

Alphadon

Alphadon (meaning "first tooth") was a genus of small, primitive mammal that was a member of the metatherians, a group of mammals that includes modern-day marsupials.

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Alphadontidae

Alphadontidae was a family of small, primitive mammal that was a member of the metatherians, a group of mammals that includes modern-day marsupials.

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Atokatheridium

Atokatheridium is an extinct genus of Deltatheridiidae from Cretaceous of United States.

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Borhyaenidae

Borhyaenidae is an extinct metatherian family of low-slung, heavily built predatory mammals in the order Sparassodonta.

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Clade

A clade (from κλάδος, klados, "branch"), also known as monophyletic group, is a group of organisms that consists of a common ancestor and all its lineal descendants, and represents a single "branch" on the "tree of life".

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Cladogram

A cladogram (from Greek clados "branch" and gramma "character") is a diagram used in cladistics to show relations among organisms.

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Cretaceous

The Cretaceous is a geologic period and system that spans 79 million years from the end of the Jurassic Period million years ago (mya) to the beginning of the Paleogene Period mya.

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Crown group

In phylogenetics, the crown group of a collection of species consists of the living representatives of the collection together with their ancestors back to their most recent common ancestor as well as all of that ancestor's descendants.

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Dasyuromorphia

The order Dasyuromorphia (meaning "hairy tail") comprises most of the Australian carnivorous marsupials, including quolls, dunnarts, the numbat, the Tasmanian devil, and the thylacine.

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Deltatheridium

Deltatheridium (meaning triangle beast or delta beast) is an extinct species of metatherian.

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Deltatheroides

Deltatheroides is an extinct genus of Deltatheridiidae from Cretaceous of Mongolia.

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Dentition

Dentition pertains to the development of teeth and their arrangement in the mouth.

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Didelphodon

Didelphodon (from ''Didelph''''is'' "opossum" plus ὀδών odōn "tooth") is a genus of stagodont metatherians from the Late Cretaceous of North America.

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Diprotodontia

The Diprotodontia (διπρωτός diprotos, meaning "two front" and οδοντος odontos meaning "teeth") are an order of about 125 species of marsupial mammals including the kangaroos, wallabies, possums, koala, wombats, and many others.

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Eodelphis

Eodelphis (ee-o-DEL-fiss), from eo- plus ''Di''''delphis'', thus meaning "very early oppossum", is a genus of stagodont metatherians from the Late Cretaceous of North America, with distinctive crushing dentition.

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Eutheria

Eutheria (from Greek εὐ-, eu- "good" or "right" and θηρίον, thēríon "beast" hence "true beasts") is one of two mammalian clades with extant members that diverged in the Early Cretaceous or perhaps the Late Jurassic.

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Genitourinary system

The genitourinary system or urogenital system is the organ system of the reproductive organs and the urinary system.

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Gondwana

Gondwana, or Gondwanaland, was a supercontinent that existed from the Neoproterozoic (about 550 million years ago) until the Carboniferous (about 320 million years ago).

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Gurlin Tsav skull

The "Gurlin Tsav" skull is a currently unnamed carnivorous metatherian fossil from the Nemegt Formation of Mongolia.

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Herpetotheriidae

Herpetotheriidae is an extinct family of metatherians.

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Holocene

The Holocene is the current geological epoch.

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Laurasia

Laurasia was the more northern of two supercontinents (the other being Gondwana) that formed part of the Pangaea supercontinent around (Mya).

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Mammal

Mammals are the vertebrates within the class Mammalia (from Latin mamma "breast"), a clade of endothermic amniotes distinguished from reptiles (including birds) by the possession of a neocortex (a region of the brain), hair, three middle ear bones, and mammary glands.

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Marsupial mole

Marsupial moles (Notoryctidae) are specialized marsupial mammals, known from two species distributed in the Australian interior.

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Microbiotheria

Microbiotheria is an australidelphian marsupial order that encompasses two families, Microbiotheriidae and Woodburnodontidae, and is represented by only one extant species, the monito del monte, and a number of extinct species known from fossils in South America, Western Antarctica, and northeastern Australia.

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Molar (tooth)

The molars or molar teeth are large, flat teeth at the back of the mouth.

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Molecular genetics

Molecular genetics is the field of biology that studies the structure and function of genes at a molecular level and thus employs methods of both molecular biology and genetics.

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Monotreme

Monotremes are one of the three main groups of living mammals, along with placentals (Eutheria) and marsupials (Metatheria).

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Montana

Montana is a state in the Northwestern United States.

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Morphology (biology)

Morphology is a branch of biology dealing with the study of the form and structure of organisms and their specific structural features.

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Nanocuris

Nanocuris is an extinct genus of Deltatheridiidae from Cretaceous of Canada (Saskatchewan) and United States (Wyoming - Lance Formation).

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North America

North America is a continent entirely within the Northern Hemisphere and almost all within the Western Hemisphere; it is also considered by some to be a northern subcontinent of the Americas.

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Oklatheridium

Oklatheridium is an extinct genus of deltatheroidan.

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Opossum

The opossum is a marsupial of the order Didelphimorphia endemic to the Americas.

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Paleocene

The Paleocene or Palaeocene, the "old recent", is a geological epoch that lasted from about.

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Pangaea

Pangaea or Pangea was a supercontinent that existed during the late Paleozoic and early Mesozoic eras.

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Pappotherium

Pappotherium is an extinct genus of mammals from the Albian (early Cretaceous) of Texas (USA), known from a fossilized maxilla fragment bearing two tribosphenic molars, discovered within the Glen Rose Formation near Decatur, Wise County, Texas.

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Paucituberculata

Paucituberculata is an order of South American marsupials.

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Peramelemorphia

The order Peramelemorphia includes the bandicoots and bilbies; it equates approximately to the mainstream of marsupial omnivores.

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Placentalia

Placentalia ("Placentals") is one of the three extant subdivisions of the class of animals Mammalia; the other two are Monotremata and Marsupialia.

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Proceedings of the Royal Society

Proceedings of the Royal Society is the parent title of two scientific journals published by the Royal Society.

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Pucadelphys

Pucadelphys is an extinct genus of non-marsupial metatherian species.

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Science (journal)

Science, also widely referred to as Science Magazine, is the peer-reviewed academic journal of the American Association for the Advancement of Science (AAAS) and one of the world's top academic journals.

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Sinodelphys

Sinodelphys is an extinct mammal from the Early Cretaceous.

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South America

South America is a continent in the Western Hemisphere, mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere.

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Sparassodonta

Sparassodonta is an extinct order of carnivorous metatherian mammals native to South America.

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Stagodontidae

Stagodontidae is an extinct family of carnivorous metatherian mammals that inhabited North America during the late Cretaceous.

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Sulestes

Sulestes is an extinct genus of Deltatheridiidae from Cretaceous of Uzbekistan.

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Taxonomy (biology)

Taxonomy is the science of defining and naming groups of biological organisms on the basis of shared characteristics.

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Tethys Ocean

The Tethys Ocean (Ancient Greek: Τηθύς), Tethys Sea or Neotethys was an ocean during much of the Mesozoic Era located between the ancient continents of Gondwana and Laurasia, before the opening of the Indian and Atlantic oceans during the Cretaceous Period.

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Tsagandelta

Tsagandelta (from "tsagan", mongolian for white, and "delta", greek for "crest") is an extinct mammal genus from the Late Cretaceous of Mongolia.

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