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龜 - plate matrix化石 - Stylemys Nebrascensis - 25 cm - 20 cm
編號 79187883
編號 79187883
SPECIES : Allosaurus
AGE : Late Jurassic (150 million years old)
FORMATION : Morrison Formation
SIZE : Tooth 1.85”long
Allosaurus is an extinct genus of large carnosaurian theropod dinosaur that lived 155 to 145 million years ago during the Late Jurassic period .