AlvarezsaurusvsMamenchisaurus
Mamenchisaurus has a higher Length (22 vs 2 m), while Mamenchisaurus has a higher Time Span (10 vs 4 Myr), while Mamenchisaurus has a higher Earliest Appearance (155 vs 89 Ma).
Physical Characteristics
2
Length
22
N/A
Weight
N/A
carnivorous
Diet
herbivorous
Classification
small theropod
Type
sauropod
Temporal Range
Late Cretaceous
Era
Late Jurassic
89
Earliest Appearance
155
85
Latest Appearance
145
4
Time Span
10
87
Temporal Midpoint
150
Discovery
1,991
Year Discovered
1,954
Argentina
Discovery Location
China
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Data sourced from World Dinosaur Dataset (Zenodo) (CC-BY 4.0).