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| | AMNH Scientific Publications: Item 2246/597 |
 | | The Grui diverged into two major radiations at the beginning of the Tertiary: (1) the Geranoidea (Geranoididae, Bathornithidae, Idiornithidae), and (2) the Gruoidea (Eogruidae, Ergilornithidae, Gruidae, Aramidae, Psophiidae). |
 | | The ergilornithids were apparently derived from an eogruid-like ancestor. |
 | | The Gruidae, Aramidae, and Psophiidae form a separa... |
| digitallibrary.amnh.org /dspace/handle/2246/597 (228 words) |
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