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Eutheria (from Greek εὐ-, eú- 'good, right' and θηρίον, thēríon 'beast'; lit.'true beasts'), also called Pan-Placentalia, is the clade consisting of placental mammals and all therian mammals that are more closely related to placentals than to marsupials.
Eutheria is the taxonomical name for the main group of living mammals. [2] This taxon contains the placental mammals, of which humans are one species. Eutheria was introduced by Thomas Henry Huxley in 1880. Members of Eutheria are now found on all continents and in all oceans.
The meaning of EUTHERIAN is of or relating to a major division (Eutheria) of mammals comprising the placental mammals.
In some taxonomic classification schemes, Eutheria is the term used for one of the three major branches or clades of mammals that includes extant members, the other two groups being the marsupials and the monotremes.
The eutherian or 'placental' mammals, like humans, make up the vast majority of today's mammalian diversity. Eutherians all have a chorioallantoic placenta, a remarkable organ that forms after conception at the site where the embryo makes contact with the lining of the mother's uterus (Langer, 2008).
placental mammal, (infraclass Eutheria), any member of the mammalian group characterized by the presence of a placenta, a vascular organ that develops during gestation, which facilitates exchange of nutrients and wastes between the blood of the mother and that of the fetus. The placentals include all living mammals except marsupials and monotremes.
Groups of Mammals. There are three groups of mammals: the eutherians, or placental mammals, the marsupials, and the monotremes, or metatherians. These groups are divided into two clades: the eutherians and marsupials comprise the clade of therian mammals, and monotremes form their sister clade.
Eutheria (or Placentalia) is the most taxonomically diverse of three branches or clades of mammals, the other two being Metatheria (or Marsupialia) and Prototheria (or Monotremata). When named by Gill in 1872, Eutheria included both marsupials and placentals.
Living Mammals. Living mammals can be classified into three major classes: eutherians, monotremes, and metatherians. The eutherians, or placental mammals, and the metatherians, or marsupials, together comprise the clade of therian mammals. Monotremes form their sister clade. There are three living species of monotremes: the platypus and two ...
Eutheria (class Mammalia, subclass Theria) The infraclass that includes all of the placental mammals, and which probably arose during the Cretaceous. The embryo is retained in the uterus, nourished by means of an allantoic placenta, and born in an advanced stage of development.