secundum Mayr, 2011

Cladi: Procellariiformes – Anhingidae – Ardeidae – Balaenicipitidae – Ciconiidae – Fregatidae – Gaviidae – Pelecanidae – Phaethontidae – Phalacrocoracidae – Scopidae – Spheniscidae – Sulidae – Threskiornithidae

secundum Jarvis et al., 2014

Ordines: Gaviiformes – Pelecaniformes – Procellariiformes – Sphenisciformes

secundum Houde et al., 2019

Ordines: Gaviiformes – Pelecaniformes – Procellariiformes – Sphenisciformes

secundum Sangster & Mayr, 2021

Ordines: Ciconiiformes – Gaviiformes – Pelecaniformes – Procellariiformes – Sphenisciformes – Suliformes

Synonyms

Aequornithia Cracraft, 2013: xxxvii

Primary references

• Mayr, G. "2011" [2010]. Metaves, Mirandornithes, Strisores and other novelties — a critical review of the higher-level phylogeny of neornithine birds. Journal of Zoological Systematics and Evolutionary Research 49(1): 58–76. DOI: 10.1111/j.1439-0469.2010.00586.x Reference page. 
• Cracraft, J. 2013. Avian Higher-level Relationships and Classification: Nonpasseriforms. xxi–xliii. In: Dickinson, E.C. & Remsen, J.V. (eds.) 2013. The Howard & Moore Complete Checklist of the Birds of the World. 4th Edition. Volume 1: Non-passerines. Eastbourne: Aves Press. ISBN 978-0-9568611-0-8 Reference page. 

Additional references

• Jarvis, E.D., Mirarab, S, Aberer, A.J., Li, B., Houde, P., Li, C., Ho, S.Y.W., Faircloth, B.C., Nabholz, B., Howard, J.T., Suh, A., Weber, C.C., da Fonseca, R.R., Li, J., Zhang, F., Li, H., Zhou, L., Narula, N., Liu, L., Ganapathy, G., Boussau, B., Bayzid, S., Zavidovych, V., Subramanian, S., Gabaldón, T., Capella-Gutiérrez, S., Huerta-Cepas, J., Rekepalli, B., Munch, K., Schierup, M., Lindow, B., Warren, W.C., Ray, D., Green, R.E., Bruford, M.W., Zhan, X., Dixon, A., Li, S., Li, N., Huang, Y., Derryberry, E.P., Bertelsen, M.F., Sheldon, F.H., Brumfield, R.T., Mello, C.V., Lovell, P.V., Wirthlin, M., Schneider, M.P.C., Prosdocimi, F., Samaniego, J.A., Vargas Velazquez, A.M., Alfaro-Núñez, A., Campos, P.F., Petersen, B., Sicheritz-Ponten, T., Pas, A., Bailey, T., Scofield, P., Bunce, M., Lambert, D.M., Zhou, Q., Perelman, P., Driskell, A.C., Shapiro, B., Xiong, Z., Zeng, Y., Liu, S., Li, Z., Liu, B., Wu, K., Xiao, J., Yinqi, X., Zheng, Q., Zhang, Y., Yang, H., Wang, J., Smeds, L., Rheindt, F.E., Braun, M., Fjeldså, J., Orlando, L., Barker, F.K., Jønsson, K.A., Johnson, W., Koepfli, K.-P., O’Brien, S.J., Haussler, D., Ryder, O.A., Rahbek, C., Willerslev, E., Graves, G.R., Glenn, T.C., McCormack, J., Burt, D., Ellegren, H., Alström, P., Edwards, S.V., Stamatakis, A., Mindell, D.P., Cracraft, J., Braun, E.L., Warnow, T., Jun, W., Gilbert, M.T.P. & Zhang, G. 2014. Whole-genome analyses resolve early branches in the tree of life of modern birds. Science 346 (6215): 1320–1331. DOI: 10.1126/science.1253451 ResearchGate. Supplementary materials: PDF Reference page. 
• Houde, P., Braun, E.L., Narula, N., Minjares, U. & Mirarab, S. 2019. Phylogenetic Signal of Indels and the Neoavian Radiation. Diversity 11(7): 108. DOI: 10.3390/d11070108 ResearchGate Reference page. 
• Braun, E.L. & Kimball, R.T. 2021. Data Types and the Phylogeny of Neoaves. Birds 2(1): 1–22. DOI: 10.3390/birds2010001 ResearchGate Reference page. 
• Sangster, G. & Mayr, G. 2021. Feraequornithes: a name for the clade formed by Procellariiformes, Sphenisciformes, Ciconiiformes, Suliformes and Pelecaniformes (Aves). Vertebrate Zoology 71: 49–53. DOI: 10.3897/vz.71.e61728 Reference page.