heterostraci

heterostraci were extinct jawless fish.

heterostraci fossils are found in paleozoic rocks.

scientists study heterostraci fossils.

heterostraci had distinctive armor plates.

the heterostraci genus lived during the silurian period.

many heterostraci species existed in ancient seas.

heterostraci specimens are preserved in museums.

researchers discovered new heterostraci fossils.

heterostraci existed for millions of years.

the heterostraci armor provided protection.

heterostraci are important for understanding evolution.

paleontologists classify heterostraci as jawless fish.