Aglaiocercus
| Aglaiocercus | |
|---|---|
| Long-tailed sylph, Aglaiocercus kingii | |
| Scientific classification | |
| Domain: | Eukaryota | 
| Kingdom: | Animalia | 
| Phylum: | Chordata | 
| Class: | Aves | 
| Clade: | Strisores | 
| Order: | Apodiformes | 
| Family: | Trochilidae | 
| Tribe: | Lesbiini | 
| Genus: | Aglaiocercus Zimmer, 1930 | 
| Type species | |
| Ornismya kingii Lesson, 1832 | |
| Species | |
| 3, see text | |
Aglaiocercus is a genus of hummingbird in the family Trochilidae.