Phaethoquornithes

Phaethoquornithes is a clade of birds that contains Eurypygimorphae and Aequornithes, which was first recovered by genome analysis in 2014. Members of Eurypygimorphae were originally classified in the obsolete group Metaves, and Aequornithes were classified as the sister taxon to Musophagiformes or Gruiformes.

Phaethoquornithes
Temporal range: Early Paleocene–Holocene Possible an early origin based on molecular clock
Juvenile red-throated loon (Gavia stellata)
Scientific classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Clade: Passerea
Clade: Phaethoquornithes
Sangster et al., 2022
Subgroups
Synonyms

Ardeae

This group has also been informally called Ardeae. Older classifications have used Ardeae in a different sense, as a suborder of Ciconiiformes containing herons and related species.

Phaethoquornithes
Phaethontimorphae

Phaethontiformes (tropicbirds)

Eurypygiformes (sunbittern and kagu)

(=Eurypygimorphae)
Aequornithes

Gaviiformes (loons)

Procellariimorphae

Procellariiformes (albatrosses and petrels)

Sphenisciformes (penguins)

Pelecanimorphae

Ciconiiformes (storks)

Suliformes (boobies, cormorants, etc.)

Pelecaniformes (pelicans, herons & ibises)

Cladogram based on Kuhl et al. (2020), with clade names following Sangster et al (2022).

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