New hypothesis of ontogenetic stages for the nasal boss of <i>Pachyrhinosaurus</i> based on new information (marked by asterisks) derived from DMNH 21460, an incomplete nasal from an immature <i>Pachyrhinosaurus perotorum</i> individual from Alaska.
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New hypothesis of ontogenetic stages for the nasal boss of Pachyrhinosaurus based on new information (marked by asterisks) derived from DMNH 21460, an incomplete nasal from an immature Pachyrhinosaurus perotorum individual from Alaska.
创建时间：
2015-12-02
