This superorder comprises just two orders:

• Podicipediformes
• Phoenicopteriformes

References

Jarvis ED, Mirarab S, Aberer AA, et al. (2014), Whole-genome analyses resolve early branches in the tree of life of modern birds, Science 346, 1320-31. (pdf)

Kuhl H, Frankl-Vilches C, Bakker A, Mayr G, Nikolaus G, Boerno ST, Klages S, Timmermann B, and Gahr M (2021), An unbiased molecular approach using 3'UTRs resolves the avian family-level tree of life, Mol. Biol. Evol. 38, 108-127. (pdf)

Manegold A (2006), Two additional synapomorphies of grebes Podicipedidae and flamingos Phoenicopteridae, Acta Ornithol. 41, 79-82. (abstract)

Mayr G (2004), Morphological evidence for sister group relationship between flamingos (Aves: Phoenicopteridae) and grebes (Podicipedidae), Zool. J. Linn. Soc. 140, 157-169. (pdf)

Prum RO, Berv JS, Dornburg A, Field DJ, Townsend JP, Lemmon EM, and Lemmon AR (2015), A comprehensive phylogeny of birds (Aves) using targeted next-generation DNA sequencing, Nature 526, 569-57. (abstract)

van Tuinen M, Butvill DB, Kirsch JAW, and Hedges SB (2001), Convergence and divergence in the evolution of aquatic birds, Proc. R. Soc. Lond. B 268, 1345-50. (pdf)

Wu S, Rheindt FE, Zhang J, Wang J, Zhang L, Quan C, Li Z, Wang M, Wu F, Qu Y, Edwards SV, Zhou Z, and Liu L (2024), Genomes, fossils, and the concurrent rise of modern birds and flowering plants in the Late Cretaceous, PNAS 121. (pdf)