- 1844 as a new group,
named "
ostracoderms" to mean 's****-skinned' (from Gr**** ὄστρακον óstrakon + δέρμα dérma).
Ostracoderms have
heads covered with a bony...
- had no
movable jaws,
classified them in 1844 into a new
group "
ostracoderms".
Ostracoderms existed in two
major groups, the more
primitive heterostracans...
-
earliest fish with
dedicated respiratory gills and
paired fins, the
ostracoderms, had
heavy bony
plates that
served as
protective exoskeletons against...
-
vertebrates or, at any rate, for the
ensemble of all
ostracoderms and the gnathostomes.
Other ostracoderms, such as the
Galeaspida are now
known to have a...
-
armored with
heavy bony-spiky plates. The
first armored agnathans—the
ostracoderms,
precursors to the bony fish and
hence to the
tetrapods (including humans)—are...
- the
species of fish it came from.
Scales originated within the
jawless ostracoderms,
ancestors to all
jawed fishes today. Most bony
fishes are
covered with...
-
corresponded to
sharp decline of
jawless fish such as
conodonts and
ostracoderms. The
Silurian system was
first identified by the
Scottish geologist Roderick...
-
vertebrates has been used to
classify them and
separate jawless vertebrates (
ostracoderms) from
those with jaws such as
placoderms and acanthodians. Similarly...
-
parts of the
water column.
Among vertebrates,
jawless armored fish (
ostracoderms)
declined in diversity,
while the
jawed fish (gnathostomes) simultaneously...
- sunfish,
giant grouper and all the
other giant bony
fishes alive today.
Ostracoderm -
armoured jawless fish.
Prehistoric fish Zhao, W.; Zhang, X.; Jia, G...
