-
Ostracoderms (lit. 's****-skins') are the
armored jawless fish of the
Paleozoic Era. The term does not
often appear in
classifications today because it...
-
jawless fish
called the conodonts, and
small mostly armoured fish
known as
ostracoderms,
first appeared. Most
jawless fish are now extinct; but the
extant lampreys...
- sunfish,
giant grouper and all the
other giant bony
fishes alive today.
Ostracoderm -
armoured jawless fish.
Prehistoric fish Zhao, W.; Zhang, X.; Jia, G...
-
corresponded to
sharp decline of
jawless fish such as
conodonts and
ostracoderms. The
Silurian system was
first identified by the
Scottish geologist Roderick...
- appeared. It was long
thought that the
first true
vertebrates (fish —
Ostracoderms)
appeared in the Ordovician, but
recent discoveries in
China reveal that...
- s****" [-i is pl. of -us]) is an
extinct subclass of pteraspidomorph,
Ostracoderm,
jawless vertebrate that
lived primarily in
marine and
estuary environments...
-
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...
- Entomostraca, Leptostraca, Malacostraca, ostracism, ostracize, ostracod,
ostracoderm, ostracon, periostra**** ostre-
oyster Gr**** ὄστρεον ostreophagist, oyster...
- the
former group very
abundant (especially goniatites).
Trilobites and
ostracoderms decline,
while jawed fishes (placoderms, lobe-finned and ray-finned bony...
-
earliest fish with
dedicated respiratory gills and
paired fins, the
ostracoderms, had
heavy bony
plates that
served as
protective exoskeletons against...
