| A (0 species) |
| B (0 species) |
| C (0 species) |
| D (0 species) |
| E (0 species) |
| F (0 species) |
| G (0 species) |
| H (1 species) |
| Hongshanornis - Early Cretaceous, 124.6-122 Ma |
| I (0 species) |
| J (0 species) |
| K (0 species) |
| L (1 species) |
| Longicrusavis - Early Cretaceous, 122 Ma |
| M (0 species) |
| N (0 species) |
| O (0 species) |
| P (0 species) |
| Q (0 species) |
| R (0 species) |
| S (0 species) |
| T (0 species) |
| U (0 species) |
| V (0 species) |
| W (0 species) |
| X (0 species) |
| Y (2 species) |
| Yanornis - Early Cretaceous, 125-120 Ma |
| Yixianornis - Early Cretaceous, 120 Ma |
| Z (0 species) |