These two taxa nest as basalmost ornithischians in the large reptile tree at ReptileEvolution.com/reptile-tree.htm yet are not included here. Proximal outgroup taxa include Eoraptor and Pampadromaeus, neither mentioned in the text. The addition of these key taxa may affect the nesting of other basal taxa.

BYU ESM-163R is not the holotype of Othnielosaurus consors (Marsh, 1894). That specimen was initially described by Galton & Jensen (1973) as Nanosaurus (?) rex, significantly postdating the establishment of Laosaurus consors Marsh, 1894. The holotype of O. consors is YPM 1882 in the Yale Peabody Museum. The later change in genus name for this species does not result in a change in holoty...