- discarded. Now, the
ptyctodonts are
regarded as the
sister group of the
Arthrodira and Phyllolepida. Fin
spine of the
ptyctodont, Gamphacanthus, showing...
- placoderms; and, most importantly, that
holocephalians have true teeth,
while ptyctodonts have beak-like
tooth plates.
Ptyctodontids were ****ually dimorphic, with...
-
acanthoracids resembled scaly chimaeras and (relatively)
heavily armored ptyctodonts. They were
distinguished from
chimaeras by
their large scales and plates...
-
ptyctodont, but
places it in his "incertae sedis" section.
Individual specimens tend to
resemble the
ptyctodonts from the same
units and
ptyctodonts from...
- (November 1996). "A New
Ptyctodont (Placodermi) from the
Upper Devonian Martin Formation of
Northern Arizona, and an
Analysis of
Ptyctodont Phylogeny". Journal...
- edrioasteroids,
dendroid graptolites, conodonts,
arthrodire placoderms,
ptyctodont placoderms,
rhenaniform placoderms,
petalichthyiform placoderms, chondrichthyans...
-
Rhamphodopsis is a
genus of
extinct ptyctodont placoderm from the
Middle Devonian Old Red
Sandstone of Scotland.
There are two
species of Rhamphodopsis...
- κτείς kteis, 'comb' and Gr****: ουρά ourá, 'tail') is an
extinct genus of
ptyctodont placoderm from the Late
Devonian of Germany. The
first fossils were found...
-
Pseudopetalichthyida as
placoderms consider them to be a
group more
advanced than the
Ptyctodonts. And as such, pro-placoderm
experts consider Pseudopetalichthyida to...
- taxonomists.
Paleontology portal Austroptyctodus,
another viviparous ptyctodont placoderm from the Gogo Reef Incisoscutum, a
viviparous arthrodire placoderm...
