Archive image from page 84 of The Cyathaspididae; a family of. The Cyathaspididae; a family of Silurian and Devonian jawless vertebrates cyathaspididaefa135deni Year: 1964 Fig. 127. Pionaspis planicosta, restoration of dorsal shield based on type (X 1). A, dorsal view; B, lateral view of left side. bro, branchial opening; orb, orbit; pbl, postbranchial lobe; ro, rostrum.

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