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Amniotes include most of the land-dwelling vertebrates alive today, namely, mammals, turtles, Sphenodon, lizards, crocodylians and birds. It is a diverse clade with over 20000 living species.
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The phylogeny of early groups of amniotes has been in a state of flux in the last few years, but the first phylogeny based on a data matrix was published in the eighties (Gauthier et al., 1988). The origins of mammals and saurians from early synapsids and early diapsids, respectively, has been relatively non...
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tolweb.org/articles/?article_id=462
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What is classically referred to the amphibia is a paraphyletic group including the ancestors of the amniotes as well as the ichthyostegids which were ancestral to all the tetrapods. The living amphibians are monophyletic, along with various other extinct forms we can get away with calling them amphibians.
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faculty.weber.edu/bdattilo/fossils/notes/amniot.html
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The Amniote Radiation ... Tree of Life guide to the Amniotes: updated 2000. ... Phylogeny and classification of amniotes, updated 2000.
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www.geology.ucdavis.edu/~cowen/HistoryofLife/CH10.html
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Genetic code-based life ... Reptiles and birds (17538 spp)
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www.speciesaccounts.org/Amniotes.htm
www.speciesaccounts.org/Amniotes.htm
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The amniotes include the mammal, reptiles, and birds ... Characteristics: Amniotes are derived with respect to amphibians in having the following: ... Amniotes are fully terrestrial and lay eggs on land . Amniotes not "tied to water" for purposes of reproduction.
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users.tamuk.edu/kfjab02/dinos/VPDINOSAURS.htm
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We humans are amniotes. Human embryos are carried by the mother for nine months in a sac filled with amniotic fluid. Chickens are amniotes. Their eggs have several membranes or sacs around the white and the yoke. These sacs become the filmy layer you peel off of a hardboiled egg.
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www.pittsburghlive.com/x/tribunereview/focus/s_534173.h...
www.pittsburghlive.com/x/tribunereview/focus/s_534173.html
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This kind of egg is unique to the amniotes, a group that includes turtles, lizards, birds, dinosaurs, and mammals. The last name in that list, the mammals, may have surprised you since most mammals do not lay eggs, but the earliest mammals laid eggs, and a few, such as the monotremes, still do.
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www.ucmp.berkeley.edu/taxa/verts/amniota.php
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Brief and Straightforward Guide: What are Amniotes? ... Amniotes were nature's way of making large land animals that were truly terrestrial in the sense that they did not depend on pools of water as a medium for reproduction. Land animals existed long before amniotes, but mostly as insects.
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www.wisegeek.com/what-are-amniotes.htm
www.wisegeek.com/what-are-amniotes.htm
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