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Any of numerous vertebrates of the group Amniota, characteristically having an amnion during embryonic development and including the reptiles, birds, and mammals.

[From New Latin amniōta, amniotes, from Greek amniōn, amnion (influenced by amniotic).]


(Zoology) any vertebrate animal, such as a reptile, bird, or mammal, that possesses an amnion, chorion, and allantois during embryonic development. Compare anamniote
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.amniote - any member of the Amniotaamniote - any member of the Amniota    
craniate, vertebrate - animals having a bony or cartilaginous skeleton with a segmented spinal column and a large brain enclosed in a skull or cranium
Amniota - higher vertebrates (reptiles, birds and mammals) possessing an amnion during development
amnion, amnios, amniotic sac - thin innermost membranous sac enclosing the developing embryo of higher vertebrates (reptiles, birds and mammals)
chorion - the outermost membranous sac enclosing the embryo in higher vertebrates (reptiles, birds and mammals)
References in periodicals archive ?
Early mesozoic coexistence of amniotes and hepadnaviridae.
Cut, copy, move, delete: The study of human interferon genes reveal multiple mechanisms underlying their evolution in amniotes.
In amniotes, colour pattern is formed by spatial differences in the distribution of pigment cells and integumentary appendages.
Early amniotes (marine invertebrates) diversified into the ancestors of mammals, turtles, crocodiles, dinosaurs, reptiles and birds.
Some of these genes are also crucial in digit formation in amniotes, a group including reptiles, mammals and birds but not amphibians.
The project she presented at SACNAS was titled, "Evaluating the Link Between Physiology and Melanin-Based Color Diversity in Amniotes.
2015: Ultraconserved elements sequencing as a low-cost source of complete mitochondrial genomes and microsatellite markers in non-model amniotes.
This early tetrapod could be the earliest example of a reptile and explain the origin of amniotes, all vertebrates that belong to reptiles, birds and mammals.
canicula (and other cat shark species) brain was the distinct brain vesicles including an enlarged telencephalon, making its brain structure more similar to that of the amniotes rather than the anamniotes.
Although there is not a singular response of marine amniotes to climate change, individual observations indicate three kinds of interrelated responses of marine amniotes: distribution shifts (geographic ranges), phenological changes (timing of seasonal activities) and interspecific interactions including competition between species and the predator-prey system dynamics.
Like other amniotes (reptiles, dinosaurs, birds, and mammals), they breathe air and do not lay eggs underwater, although many species live in or around water.