There are currently two primary but competing views of azhdarchoid relationships. The first, presented by Felipe Pinheiro and colleagues in 2011, considers the tapejarids to be a monophyletic clade including the thalassodromines and chaoyangopterines. The second, found by Lu et al. 2008 as well as Naish & Martill 2006, considers the tapejarids to be a paraphyletic grade of primitive azhdarchoids. All azhdarchoids closer to Azhdarcho than to Tapejara are included in the clade Neoazhdarchia ("new azhdarchids").
^Pinheiro, F.L., Fortier, D.C., Schultz, C.L., De Andrade, J.A.F.G. and Bantim, R.A.M. (in press). "New information on Tupandactylus imperator, with comments on the relationships of Tapejaridae (Pterosauria)." Acta Palaeontologica Polonica, in press, available online 03 Jan 2011. doi:10.4202/app.2010.0057
^Lü, J., Unwin, D.M., Xu, L., and Zhang, X. (2008). "A new azhdarchoid pterosaur from the Lower Cretaceous of China and its implications for pterosaur phylogeny and evolution." Naturwissenschaften, 95(9): 891-897. doi:10.1007/s00114-008-0397-5PMID 18509616
^Andres, B.; Myers, T. S. (2013). "Lone Star Pterosaurs". Earth and Environmental Science Transactions of the Royal Society of Edinburgh: 1. doi:10.1017/S1755691013000303.edit