-
Diapsids ("two arches") are a
clade of sauropsids,
distinguished from more
primitive eureptiles by the
presence of two holes,
known as
temporal fenestrae...
-
though not
diapsids in a
purely anatomical sense,
qualify as
members of the
clade Diapsida due to
their likely diapsid ancestry. Some
diapsids, particularly...
-
Archosauria (lit. 'ruling reptiles') or
archosaurs (/ˈɑːrkəˌsɔːr/) is a
clade of
diapsid sauropsid tetrapods, with
birds and
crocodilians being the only extant...
- in
synapsids (mammals and
their extinct relatives)
there is one; and in
diapsids (including birds, crocodilians, squamates, and tuataras),
there are two...
-
Sauria is the
clade of
diapsids containing the most
recent common ancestor of
Archosauria (which
includes crocodilians and birds) and
Lepidosauria (which...
- thus
defining Reptilia as a more
restricted crown group encomp****ing
diapsids and
parareptiles (apart from mesosaurs,
which he
considered to be the most...
-
modern paleontologists believe that the
Testudines are
descended from
diapsid reptiles that lost
their temporal fenestrae. More
recent morphological...
- "anapsid" clade.
Analysis of
fossil data has
shown that
turtles are
likely diapsid reptiles, most
closely related either to the
archosaurs (crocodiles, bird...
-
bones at the back of the skull.
While all but the
earliest eureptiles were
diapsids, with two
openings at the back of the skull,
parareptiles were generally...
- quadrate/quadratojugal bones,
similar to the
condition found in
primitive diapsids.
However early rhynchocephalians and
lepidosauromorphs had an open lower...
