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étymologie

Qu'est-ce (qui) est eutherian - définition

CLADE OF MAMMALS

Eutherian; Eutherians; Monodelphia; Eutherid; Eutherian mammal

Monodelphia

·noun ·pl The group that includes all ordinary or placental mammals; the Placentalia. ·see Mammalia.

Eutherian fetoembryonic defense system (eu-FEDS) hypothesis

Eu-FEDS; Eutherian Fetoembryonic Defense System

The Eutherian Fetoembryonic Defense System (eu-FEDS) is a hypothetical model describing a method by which immune systems are capable of recognizing additional states of relatedness like "own species" such as is observed in maternal immune tolerance in pregnancy. The model includes descriptions of the proposed signaling mechanism and several proposed examples of exploitation of this signaling in disease states.

https://en.wikipedia.org/wiki/Eutherian_fetoembryonic_defense_system_(eu-FEDS)_hypothesis

eutherian {{Zoology}}

eutherian Zoology [ju:'???r??n]

¦ noun a mammal of the major group Eutheria, which comprises the placentals. Compare with metatherian.

¦ adjective relating to eutherians.

Origin

from mod. L. Eutheria, from eu- + Gk theria, plural of therion 'wild beast'.

Wikipédia

Eutheria

Eutheria (; from Greek εὐ-, eú- 'good, right' and θηρίον, thēríon 'beast'; lit. 'true beasts') is the clade consisting of all therian mammals that are more closely related to placentals than to marsupials.

Eutherians are distinguished from noneutherians by various phenotypic traits of the feet, ankles, jaws and teeth. All extant eutherians lack epipubic bones, which are present in all other living mammals (marsupials and monotremes). This allows for expansion of the abdomen during pregnancy.

The oldest-known eutherian species is Juramaia sinensis, dated at 161 million years ago from the early Late Jurassic (Oxfordian) of China.

Eutheria was named in 1872 by Theodore Gill; in 1880 Thomas Henry Huxley defined it to encompass a more broadly defined group than Placentalia.

https://en.wikipedia.org/wiki/Eutheria