baby
small juvenile
reference
・John
R. Horner and Mark B. Goodwin"Major cranial changes during Triceratops ontogeny"
・Mark B. Goodwin, William A. Clemens, John R. Horner and Kevin Padian
"The Smallest Known Triceratops Skull: New Observations on Ceratopsid Cranial Anatomy and Ontogeny"
