Dictionary entry details • EUTHERIA (noun) Sense 1. Eutheria (Placentalia) An infraclass of mammals in which the embryos are retained in a uterus in the mother's body and nourished by a placenta.
eutherian: Any of various mammals of the infraclass Eutheria, including all of the species, such as primates, carnivores, whales, ruminants, bats, and rodents, in which the female bears live young that are nourished before birth by means of a complex placenta. [ www.macroevolution.net/biology-dictionary-e.html] Eutheria: Placental mammals. Definition noun, plural: eutherians A eutherian mammal adjective Of, pertaining to, or belonging to the group of eutherian mammals Supplement Word origin: Greek eu– (true) + therion (beast) Synonym(s): eutherian mammal placental mammal Compare: metatherian prototherian See also: Placentalia Eutheria mammal.. Read More. Marsupials differ from eutherians in that there is a less complex placental connection. Definition noun A taxonomic group within Class Mammalia (as first proposed by Thomas Henry Huxley in 1880) comprised of eutherian mammals in which viviparous, chorioallantoic placentals give birth to well developed young Supplement Most mammals belong to this group, including primates and humans. Definition of eutherian mammal in the Definitions.net dictionary. Classified under: Nouns denoting animals. Meaning: All mammals except monotremes and marsupials. Eutheria. Information and translations of eutherian mammal in the most comprehensive dictionary definitions resource on the web. Placentalia is the clade originating with the last common ancestor of extant eutherians. noun, plural: eutherian mammals Any from the group of mammals possessing chorioallantoicplacenta(as opposed to other mammaliangroups) Horizontal gene transfer is known to occur between different species, such as between prokaryotes (organisms whose cells lack a defined nucleus) and eukaryotes (organisms whose cells contain a defined nucleus), and between the three DNA-containing organelles of eukaryotes—the nucleus, the mitochondrion, and the chloroplast. Meaning of eutherian mammal. Types of Organisms: Turtles, tortoises, lizards, snakes, crocodiles and birds. Placental mammals evolved during the Cretaceous period (about 100 million years ago). Phylum: Chordata. What does eutherian mammal mean? Eutheria n mammals nourish their young within the uterus to mored advanced stage of development than do most marsupials. The eutherians, or placental mammals, and the metatherians, or marsupials, together comprise the clade of therian mammals.
During development, the embryo grows inside, and beside, four extraembryonic membranes that protect and nurture it. Eutherians are the most widespread of the mammals, occurring throughout the world. In mammals, the fetus lies in the amniotic sac, which is formed by the chorion and the amnion and separates the embryo from the mother’s endometrium. All living Eutherians are placental mammals , The Eutherian fetus is fed during gestation by the placenta , Eutherians are distinguished from noneutherians by various phenotypic traits of the feet , the ankles , the jaws and teeth , All extant eutherians lack epipubic bones .
The young are thus fully protected during their embryonic development and kept at a constant temperature. The chorion is one of the membranes that surround the fetus while it is still being formed. Collins Dictionary of Biology, 3rd ed. eutherian any placental mammal of the subclass Eutheria, characterized by the embryo developing in the uterus of the female where it obtains food and exchanges gases through the attached PLACENTA. Subgroup: Tetrapods. They differ from non-eutherian mammals from having a chorioallantoic placenta that … eutherian, placental, placental mammal mammal, mammalian - any warm-blooded vertebrate having the skin more or less covered with hair; young are born alive except for the small subclass of monotremes and nourished with milk Eutheria, subclass Eutheria - all mammals except monotremes and marsupials . Synonyms: Eutheria; subclass Eutheria. Noun 1. Eutheria synonyms, Eutheria pronunciation, Eutheria translation, English dictionary definition of Eutheria. A subclass of the Class Mammalia (others are monotremes and marsupials). © W. G. Hale, V. A. Saunders, J. P. Margham 2005 Want to thank TFD for its existence? Embryo and fetus are nourished by a placenta. Hypernyms ("Eutheria" is a kind of...): class ((biology) a taxonomic group containing one or more orders) Meronyms (members of "Eutheria"):