in Animals, General The estimated number…. by Chirag Chauhan March 6, 2018, 10:38 pm 245 Views The estimated number of dinosaur species that existed in the Mesozoic era is between 1,543 and 2,468 species. dinosaurMesozoic era Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website By using this form you agree with the storage and handling of your data by this website. *