- on the species.
Placoderms were
among the
first jawed fish;
their jaws
likely evolved from the
first of
their gill arches.
Placoderms are
thought to be...
-
established names, and
genera that are no
longer considered placoderms. The
modern descendants of
placoderms, the bony and
cartilaginous fishes, and
their extinct...
- P. Plax;
Michael J.
Newman (2020). "New
Early Devonian (late Emsian)
placoderms from Belarus".
Journal of Paleontology. 94 (4): 773–787. doi:10.1017/jpa...
-
hinged to the
thoracic armour. This
allowed placoderms to lift
their heads,
unlike ostracoderms.
Placoderms were the
first jawed fish;
their jaws likely...
-
other placoderms, may have also been
among the
first vertebrates to
internalize egg fertilization, as seen in some
modern sharks. Some
other placoderms have...
- that a
branch of
Placoderms was most
likely the
ancestor of present-day gnathostomes. A 419-million-year-old
fossil of a
placoderm named Entelognathus...
-
leading the
Devonian to
often be
dubbed the Age of Fishes. The
armored placoderms began dominating almost every known aquatic environment. In the oceans...
-
connection between the
teeth and the
original dermal scales. The old
placoderms did not have
teeth at all, but had
sharp bony
plates in
their mouth. Thus...
-
class Placodermi.
Recent studies indicate that
Osteichthyes evolved from
placoderms like Entelognathus,
while acanthodians are more
closely related to modern...
-
including all
living cartilaginous and bony fish, as well as the
extinct placoderms and acanthodians. Most fish are cold-blooded,
their body
temperature varying...
