CollectA AlamosaurusCollectA Alamosaurus CollectA model 88462 Product Dimensions: 20. 5 x 5 x 13. 5 cm Age: 3 years and up Alamosaurus was a massive, long necked sauropod dinosaur that lived during the Late Cretaceous period, around 70 million years ago, in what is now North America. Despite its massive size, Alamosaurus was a gentle giant that likely fed on plants high in the trees, as suggested by its incredibly long neck. Interestingly, Alamosaurus is one of the few