AlvarezsaurusvsSinornithosaurus
Alvarezsaurus has a higher Time Span (4 vs 2 Myr), while Sinornithosaurus has a higher Latest Appearance (120 vs 85 Ma), while Sinornithosaurus has a higher Temporal Midpoint (121 vs 87 Ma).
Physical Characteristics
2
Length
2
N/A
Weight
N/A
carnivorous
Diet
carnivorous
Classification
small theropod
Type
small theropod
Temporal Range
Late Cretaceous
Era
Early Cretaceous
89
Earliest Appearance
122
85
Latest Appearance
120
4
Time Span
2
87
Temporal Midpoint
121
Discovery
1,991
Year Discovered
1,999
Argentina
Discovery Location
China
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Data sourced from World Dinosaur Dataset (Zenodo) (CC-BY 4.0).