-
among most
bilaterians,
where the
sense organs and
central nerve ganglia become concentrated at the
front end of the animal.
Bilaterians constitute one...
- It is
often suggested that the
basalmost bilaterians are the Xenacoelomorpha, with all
other bilaterians belonging to the
subclade Nephrozoa. However...
-
other bilaterians. However, a 2007
study concluded that
Acoela and
Nemertodermatida were two
distinct groups of
bilaterians. Xenoturbella, a
bilaterian whose...
- of
bilaterian animals,
namely the arthropods,
cephalopod molluscs, and vertebrates. Hox
genes organise aspects of
cephalization in the
bilaterians. Cephalization...
- the
difference in the neuraxis, or if an
invertebrate is a non-
bilaterian. A non-
bilaterian has no
anterior or
posterior surface for
example but can still...
- and
bilateral symmetry in
bilaterians. Alternatively, the
second suggestion is that an
ancestor of
cnidarians and
bilaterians had
bilateral symmetry before...
- and
molecular markers that are
present in
bilaterians and
absent in cnidarians, ctenop****s, and
bilaterians. Steinmetz, Kraus, et al.
showed that the...
-
estimates are
compatible with an
Ediacaran bilaterian,
although it is possible,
especially if
early bilaterians were small, that the
bilateria had a long...
-
monophyletic and
therefore continues to be used as such. The
original bilaterian is
hypothesized to be a
bottom dwelling worm with a
single body opening...
- have
striated muscle,
which in
bilaterians arises from the mesoderm. They did not
commit themselves on
whether bilaterians evolved from
early cnidarians...
