File:Pikaia BW.jpg
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Summary
Pikaia gracilens, the earliest known vertebrate ancestor, from the Middle Cambrian of British Columbia, digital
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 06:55, 4 January 2017 | | 800 × 508 (18 KB) | 127.0.0.1 (talk) | <p>Pikaia gracilens, the earliest known vertebrate ancestor, from the Middle Cambrian of British Columbia, digital </p> |
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