Occasionally Amynodon are reconstructed with same shape of Metamynodon. But there are differences between the skeleton of Amynodon and Metamynodon. Amynodon has longer legs than Metamynodon. And the skull forms are difference too. I tried to express the differences for this model.
Triceratops adult and baby
length 40cm (adult)
The main references
Goodwin, M. B., Clemens, W. A., Horner, J. R., and Padian, K. (2006). "The smallest known Triceratops skull: new observations on ceratopsid cranial anatomy and ontogeny." . Journal of Vertebrate Paleontology 26 (1): 103. Horner JR, Goodwin MB."Major cranial changes during Triceratops ontogeny."Proc Biol Sci. 2006 Nov 7;273(1602):2757-61.
Fujiwara, S.-I. (2009). "A Reevaluation of the manus structure in Triceratops (Ceratopsia: Ceratopsidae)." Journal of Vertebrate Paleontology, 29(4): 1136-1147. Hieronymus TL, Witmer LM, Tanke DH, Currie PJ.(2009)."The facial integument of centrosaurine ceratopsids: morphological and histological correlates of novel skin structures." The Anatomical record2009, vol. 292, no9, pp. 1370-1396
"New Information on the Skull of the Enigmatic Theropod Spinosaurus,
With Remarks on its Size and Affinities."Dal Sasso, C.; Maganuco, S.;
Buffetaut, E.; Mendez, M.A. (2005)
Journal of Vertebrate
Paleontology, Vol. 25 (4)
"My theropod is bigger than yours...or not: estimating body size
from skull length in theropods".Therrien, F.; and Henderson, D.M.
(2007).Journal of Vertebrate Paleontology27 (1)
"Dinosaur Expo 2009 -The Miracle of Deserts " official Catalogue