Spesies agnatha yang Telah punah. Berasal dari zaman Karbon.

Bacaan lanjut

  1. New agnathous fishes from the Pennsylvanian of Illinois / David Bardack — and Eugene S. Richardson, Jr. —

Publication Info: Chicago :Field Museum of Natural History,1977.
Contributed By: University of Illinois Urbana Champaign
Rise of the Dragon
Oleh Henry Gee
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Oleh Jørgen Mørup Jørgensen

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