Pycnosteus Explained

Pycnosteus is an extinct genus of jawless fish from the Devonian. It is thought to have cruised through vegetation, eating small invertebrates which it knocked loose .^[1]

Sources

• Fishes of the World by Joseph S. Nelson
• Vertebrate Fossils and the Evolution of Scientific Concepts by W. Sargeant

Notes and References

1. Web site: Pteraspidomorphi: Psammosteida (2): Guerichosteids, Pycnosteids, Psammosteids & Psammolepis . Palaeos Vertebrates.