yes
Yes that is true as sloss
They're both extinct bony fishes. The difference is that ostracoderms were jaw-less and placoderms had jaws.
primtie finsJAWSOstracoderms were jawless fishes with bony armor that protected them from predators.
Ostracoderms were a group of extinct jawless fishes that lived from the late Cambrian to the end of the Devonian period. They were characterized by their bony armor covering their bodies, lack of jaws, and typically, had a cartilaginous skeleton. Ostracoderms are considered to be among the earliest vertebrates.
Ostracoderms were ancient fish with an an armor of bony plates. However, your question is very muddled and therefore we can not answer it properly.
Lampreys are in the superclass Agnatha, jawless fish. They are of the class Cyclostomata, which includes hagfish, as opposed to the extinct Ostracoderms.
They were jawless fish that lived during the Paleozoic era Stunningly some of our oldest ancestors came from ostracoderms!
Ordovician Period
Alexander the Great
It is thought that camels are descended from a animal that lived in North America they have not currently named this creature but this may be where camels and Llamas descended from.
Herzog is my family name and I have been told that it is German for "Duke." It is thought that we descended from a Duke, or descended from peasants on his land that adopted the name.
lobe-finned fish