#birkenia

[antiqueanimals]

Primitive fish from Prehistoric Animals, written/illustrated by William E. Scheele. 1954.

1.) Cephalaspis

2.) Birkenia

3.) Pteraspis

4.) Climatius

[cheetahtrout]

First fishfriday in 2020. Starting off with jawless fish, cause you know they are my favorites: pteraspis and birkenia. Pteraspis and Birkenia have two quite different styles of protection, with pteraspis having heavy armor plates in front and smaller scales in the back, whereas birkenia had rows of elongate, bony scales laid out like tiles. Giving it a little more fexibility but also less protection.

[kelpgull]

Paleovember - Set 6 26-Cartorhynchus 27-Megalograptus 28-Proganochelys 29-Birkenia