Image: Heterostraci
Heterostraci.gif (313 × 103 pixels, file size: 10 KB, MIME type: image/gif)
Description: Heterostraci (genus Pteraspis?)
Title: Heterostraci
Credit: http://www.copyrightexpired.com/earlyimage/prehistoriclifebeforekt/silurianfishes_ntm_1905_smit_1929.html
Author: by Joseph Smit (1836-1929), from Nebula to Man, 1905 England
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
Image usage
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