AlvarezsaurusvsZephyrosaurus
Zephyrosaurus has a higher Time Span (10 vs 4 Myr), while Zephyrosaurus has a higher Earliest Appearance (120 vs 89 Ma), while Zephyrosaurus has a higher Temporal Midpoint (115 vs 87 Ma).
Physical Characteristics
2
Length
2
N/A
Weight
N/A
carnivorous
Diet
herbivorous
Classification
small theropod
Type
small ornithopod
Temporal Range
Late Cretaceous
Era
Early Cretaceous
89
Earliest Appearance
120
85
Latest Appearance
110
4
Time Span
10
87
Temporal Midpoint
115
Discovery
1,991
Year Discovered
1,980
Argentina
Discovery Location
USA
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Data sourced from World Dinosaur Dataset (Zenodo) (CC-BY 4.0).