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  • Robert L. Carlton
Chapter

Abstract

a class or subclass of jawless fish, similar in shape to the heterostracans but more closely related to the osteostracans. They are notable for a flattened, one-piece bony headshield, with an opening of various shapes and sizes on the headshield. Some bore striking slender processes projecting laterally or forward. China and Vietnam, early Silurian to Early Devonian.

Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Robert L. Carlton
    • 1
  1. 1.SalemUSA

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