- The
zygosphene-zygantrum
articulation is an
accessory joint between vertebrae found in
several lepidosauromorph reptiles. This
pivot joint consists of...
- lacing. The
marginal teeth are stout,
bicarinate and
smooth or striated.
Zygosphenes and
zygantra are absent,
incipient or
large and functional. Prognathodon...
- overlapping, and of a pair of
anterior wedge-shaped
processes called zygosphene, ****ing into a pair of
corresponding concavities, zygantrum, just below...
- less
pronounced accessory articular processes (at the time
identified as
zygosphene-zygantrum articulations). The
rocks in
which these fossils were discovered...
-
centrum all
contributing to the
height in
equal measures. The roof of the
zygosphene slopes at a
steep angle and its
junction with the
neural spine is blunt...
- surangular.
Cervicals with
reniform central articulations and
prominent zygosphenes and zygantra.
Dental formula: 4
teeth in premaxilla, 12–13
teeth in maxilla...
-
swollen moving anterior to posterior,
indicative of
pachyostotic nature.
Zygosphenes presence are
notable in some vertebrae. They
project anteriorly from...
- maxillary/premaxillary overlap.
Sophineta resembles lepidosaurs in
having weak
zygosphenes,
short vertebrae and single−headed ribs
throughout the column, but differs...
-
vertebrae have tall,
straight neural spines that lack any
processes or
zygosphene-zygantrum articulation, a
joint found in most squamates. The
caudal vertebrae...
- to that of the
other species in its
general proportions and the
strong zygosphene-zygantrum articulation. C.
iguanavus can be
differentiated in its central...
