From McDonald's (2011) abstract...
"Firsthand examination of the holotypes of the two taxa and numerous other =
basal iguanodont specimens=2C as well as a principal components analysis of=
basal iguanodont dentaries=2C did not find any morphological features to j=
ustify the distinction of Dollodon from Mantellisaurus. Dollodon bampingi i=
s thus best considered a nomen dubium and junior synonym of Mantellisaurus =
atherfieldensis."
I have no opinion of the validity of Dollodon=2C but people have to learn w=
hat nomen dubium means. Dollodon can be a junior synonym of Mantellisaurus=
or it can be a nomen dubium=2C but it can't be both.
/rant
Mickey Mortimer