The term "Suborder Sauropoda" refers to a group of long-necked, herbivorous dinosaurs that lived during the Jurassic and Cretaceous periods. There are several synonyms for this suborder, including Brachiosauria, Titanosauria, Cetiosauridae, and Diplodocidae. Each of these synonyms refers to a specific family or group of Sauropods that share certain physical characteristics, such as size, shape of the neck and tail, and overall morphology. While the exact relationships between the different groups within Sauropoda are still being studied, it is clear that these animals were some of the largest to ever walk the earth and played an important role in the ecosystems of their time.