Parent: Bucconidae (Puffbirds)

└─ Nonnula

└─── Nonnula amaurocephala (Chestnut-headed nunlet)

└─── Nonnula brunnea (Brown nunlet)

└─── Nonnula frontalis (Grey-cheeked nunlet)

└─── Nonnula rubecula (Rusty-breasted nunlet)

└─── Nonnula ruficapilla (Rufous-capped nunlet)

└─── Nonnula sclateri (Fulvous-chinned nunlet)