AlvarezsaurusvsPachycephalo-saurus
Pachycephalo-saurus has a higher Length (3 vs 2 m), while Alvarezsaurus has a higher Time Span (4 vs 3 Myr), while Alvarezsaurus has a higher Earliest Appearance (89 vs 69 Ma).
Physical Characteristics
2
Length
3
N/A
Weight
450
carnivorous
Diet
herbivorous
Classification
small theropod
Type
pachycephalosaur
Temporal Range
Late Cretaceous
Era
Late Cretaceous
89
Earliest Appearance
69
85
Latest Appearance
66
4
Time Span
3
87
Temporal Midpoint
68
Discovery
1,991
Year Discovered
1,943
Argentina
Discovery Location
Canada, USA
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Data sourced from World Dinosaur Dataset (Zenodo) (CC-BY 4.0).