👉 The term "ophioglossales" refers to a group of extinct mammal or bird species that lived during the Late Cretaceous period, around 68 million years ago. This group includes some of the most well-preserved fossils known from this time frame, and it is thought to have been a large and diverse group of herbivorous mammals and birds that existed in North America. The exact number of ophioglossal species remains unknown, but many are considered extinct or