amniote


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amniote

 [am´ne-ōt]
any animal that develops an amnion.

amniote

(ăm′nē-ōt′)
n.
Any of numerous vertebrates of the group Amniota, characteristically having an amnion during embryonic development and including the reptiles, birds, and mammals.

amniote

any land vertebrate which possesses an AMNION, CHORION and ALLANTOIS, i.e. reptiles, birds and mammals.

Patient discussion about amniote

Q. what does it mean when an ultrasound shows an empty amniotic sac and no baby?

A. This exact thing happened with my friend who is now 22 weeks with her first baby. She had 2 additional sacs - both empty - and the doctor said that the pregnancy had probably started out as triplets but that only one of the embryos had actually established and continued to grow.

Her doctor said it is very common for a woman to have more than one egg fertilize but that in most cases the pregnancy continues as a singleton only. She told my friend that the empty sacs would just disappear through time (which they did) and that they posed no danger to her baby.

More discussions about amniote
References in periodicals archive ?
Similarly, for nuclear genes in the amniote phylogeny, with highly unequal branch lengths, accounting for rate heterogeneity made the most difference [ILLUSTRATION FOR FIGURE 7 OMITTED], although no model was able to recover the expected tree [ILLUSTRATION FOR FIGURE 7 OMITTED].
Odd as they are, turtles clearly belong to the lineage of amniotes, which includes mammals, birds and reptiles.
In their review of the evolution of intelligence, Emery and Clayton (2004) note that "divergent brain evolution" has resulted in substantial differences across amniotes in brain organization at the cellular level.
At the heart of Carroll's theory lies the amniote egg, which has a series of membranes not present in the simpler eggs of frogs and salamanders.
Early mesozoic coexistence of amniotes and hepadnaviridae.
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. PLoS ONE 10: e0138446.
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.
The evolution of viviparity: molecular and genomic data from squamate reptiles advance understanding of live birth in amniotes. Reproduction 147: R15-R26.