| ORD | extinct plants having tall arborescent trunks comparable to or more advanced than cycads |
|---|---|
| ORD | an order of insects: includes booklice and barklice |
| ORD | crocodiles |
| ORD | crocodiles |
| ORD | cuckoos |
| ORD | primitive tropical gymnosperms abundant in the Mesozoic, now reduced to a few scattered tropical forms |
| ORD | fossil gymnospermous trees or climbing plants from the Devonian: seed ferns |
| ORD | primitive jawless aquatic vertebrate: lampreys |
| ORD | ctenophores having two long pinnate tentacles |
| ORD | ctenophores having two long pinnate tentacles |
| ORD | ctenophores having two long pinnate tentacles |
| ORD | an order of animals including almost entirely freshwater fishes: characins |