AlvarezsaurusvsValdosaurus
Valdosaurus has a higher Time Span (21 vs 4 Myr), while Valdosaurus has a higher Earliest Appearance (142 vs 89 Ma), while Valdosaurus has a higher Temporal Midpoint (132 vs 87 Ma).
Physical Characteristics
2
Length
3
N/A
Weight
N/A
carnivorous
Diet
herbivorous
Classification
small theropod
Type
small ornithopod
Temporal Range
Late Cretaceous
Era
Early Cretaceous
89
Earliest Appearance
142
85
Latest Appearance
121
4
Time Span
21
87
Temporal Midpoint
132
Discovery
1,991
Year Discovered
1,975
Argentina
Discovery Location
England, Niger, Romania, UnitedKingdom
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Data sourced from World Dinosaur Dataset (Zenodo) (CC-BY 4.0).