-
ptyctodontids did not, that the
armored plates and
scales of
holocephalians are made of dentine, and the
armored plates and
scales of
ptyctodontids were...
-
their skin,
while ptyctodontids do not; the
armoured plates and
scales of
holocephalians are made of dentine,
while those of
ptyctodontids are made of bone;...
- find
confirmed the
hypothesis that a sub-group of placoderms,
called ptyctodontids,
fertilized their eggs internally. Some
fishes that
fertilize their...
- Materpiscis, a
ptyctodontid placoderm fish that is the
oldest vertebrate known to give live birth...
- Holoptychius's
pectoral fins were
placed high on the body.
Ptyctodontida The
ptyctodontids (beak-teeth) are an
extinct monotypic order of
unarmored placoderms...
- 1977.
Placoderm interrelationships reconsidered in the
light of new
ptyctodontids from Gogo,
Western Australia.
Linnean Society of London,
Symposium Series...
- in the
light of new
ptyctodontids from Gogo
Western Australia. Linn. Soc. Symp.
Series 4: 123-198. Long, J.A. 1997.
Ptyctodontid fishes from the Late...
-
Palaeomylus (meaning 'ancient grinder') is an
extinct Devonian ptychodontid placoderm fish.
There are
seven species accepted in this genus: Palaeomylus...
- from the side as
apposed from
other angles.
Other placoderms such as
ptyctodontid placoderms have
similarly shaped claspers. For example, the
clasper of...
-
Materpiscis (Latin for
mother fish) is a
genus of
ptyctodontid placoderm from the Late
Devonian located at the Gogo
Formation of
Western Australia. Known...
