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Amniotes are
tetrapod vertebrate animals belonging to the
clade Amniota, a
large group that
comprises the vast
majority of
living terrestrial and semiaquatic...
- (/tɛˈtræpədə/).
Tetrapods include all
extant and
extinct amphibians and
amniotes, with the
latter in turn
evolving into two
major clades, the sauropsids...
- Pan-Amniota) is a
clade containing the
amniotes and
those tetrapods that
share a more
recent common ancestor with
amniotes than with
living amphibians (lissamphibians)...
- Like amphibians,
amniotes are air-breathing vertebrates, but they have
complex eggs or embryos,
including an
amniotic membrane.
Amniotes include reptiles...
- The
primitive streak is a
structure that
forms in the
early embryo in
amniotes. In amphibians, the
equivalent structure is the blastopore.
During early...
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advanced reptiliomorphs (transitional
between "amphibians"
sensu lato and
amniotes)
positioned close to, but
outside of the
clade Amniota,
though some recent...
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Sauropsida (Gr**** for "lizard faces") is a
clade of
amniotes,
broadly equivalent to the
class Reptilia,
though typically used in a
broader sense to include...
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fluid is the
protective liquid contained by the
amniotic sac of a
gravid amniote. This
fluid serves as a
cushion for the
growing fetus, but also serves...
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Serpentes (/sɜːrˈpɛntiːz/). Like all
other squamates,
snakes are ectothermic,
amniote vertebrates covered in
overlapping scales. Many
species of
snakes have...
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Others prioritize the
clade Sauropsida,
which typically refers to all
amniotes more
closely related to
modern reptiles than to mammals. The
earliest known...
