The short-crested group seem initially to have possessed a nasal horn of exceptional size (e. g. Monoclonius), brow horns being either diminutive or absent, but subsequently the nasal horn appears to have undergone progressive reductionanbsp;...
Title | : | Handbuch der Paläoherpetologie: Ornithischia |
Author | : | Oskar Kuhn |
Publisher | : | - 1969 |
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