| Scientific Name | TSN | Taxon Author | Common Name | Name Source | Usage | Reason (ITIS) | Taxon Rank |
|---|
| Pterocnemia pennata | 696083 | (Orbigny, 1834) | Lesser Rhea Darwin's Rhea | ITIS | valid | | Species |
| Pteroicnemia pennata | 174381 | (Orbigny, 1834) | | ITIS | invalid | unavailable, literature misspelling of Pterocnemia pennata | Species |
| Rhea pennata | 553787 | Orbigny, 1834 | | ITIS | invalid | original name/combination of Pterocnemia pennata | Species |
