amniote


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amniote

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

amniote

/am·ni·ote/ (am´ne-ōt) any member of the group of vertebrates that develop an amnion, including reptiles, birds, and mammals.

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.

amniote

any animal with amnion.

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.
To solve the puzzle of amniote evolution, Carroll took some clues from the family of small, lungless salamanders known as plethodontids.
It suggests that we, and maybe amniotes in general, are much more alone in the lack of an ability to regenerate limbs," she says.
Compared with anamniotes, the amniotes have fewer commissures during initial development although the amniotes eventually form these but at later stages.
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.
Introductory Sentences: "The question presents a statement Improved Student Application that birds and mammals are amniotes with (l)-(2)-(3) Guided whose embryos are supported by extra- Reflection embryonic membranes.
These lines - incremental lines of von Ebner - are present across all amniotes, and record daily dentin deposition.
2007) and McKenna and Farrell (2009) indicate that the four living suborders of beetles diverged in the Permian, when early amniotes, conifers, and others groups of terrestrial organisms, including other insects (Labandeira and Sepkoski, 1993), were also diversifying.
Hundreds of bones have been extracted from La Mora site (Tagamanent), mainly assigned to temnospondyl capitosaurs and, to a lesser extent, to amniotes, including archosauriforms and procolophonoids (Gaete et al.