AlvarezsaurusvsPolacanthus
Polacanthus has a higher Length (5 vs 2 m), while Polacanthus has a higher Latest Appearance (125 vs 85 Ma), while Polacanthus has a higher Temporal Midpoint (125 vs 87 Ma).
Physical Characteristics
2
Length
5
N/A
Weight
N/A
carnivorous
Diet
herbivorous
Classification
small theropod
Type
armoured dinosaur
Temporal Range
Late Cretaceous
Era
Early Cretaceous
89
Earliest Appearance
125
85
Latest Appearance
125
4
Time Span
N/A
87
Temporal Midpoint
125
Discovery
1,991
Year Discovered
1,881
Argentina
Discovery Location
England, UnitedKingdom
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Data sourced from World Dinosaur Dataset (Zenodo) (CC-BY 4.0).