Paleozoic Pals Astraspis Plush Evolution

Paleozoic Pals Astraspis Plush EvolutionAstraspis desiderataOrdovician jawless fish The very first fish to appear in the fossil record had no jaws! These fish were probably filter feeders, collecting and straining bits of food from the water by swimming with their mouths open. Tiny bony plates in their mouths created suction and crushed larger pieces of food. Jawless fish are thought to have lived in the mud or sand at the bottom of seas, rivers, and lakes. Most early jawless fish had bony

in the form of long lobe bands of aragonite on the inner shell surface of smooth-shelled late Paleozoic pinnids

which is equivalent to the lower Concepcion (upper bathyal to outer neritic)

Pages: 146

Year published: 1987

and assigned to the family Solemyidae

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and an upper Betraccium deweveri Subzone

Leemon Formation

into the tropical forests of Eocene Antarctica

It had a heavily rounded back

Amphissites Girty

growing up to 30 feet long and weighing over a ton