According to Horner et al. (2004), Sereno's definition would place a few other well-known hadrosaurs (such as Telmatosaurus and Bactrosaurus) outside the family, which led them to define the family to include Telmatosaurus by default.
Prema Horner et al. (2004.), Serenova definicija bi isključila nekoliko poznatih hadrosaura (kao što su Telmatosaurus i Bactrosaurus) iz porodice; to ih je navelo da definiraju porodicu tako da sadrži i rod Telmatosaurus.