Europasaurus is a basal macronarian sauropod, a type of herbivorous dinosaur that moved on all fours. It thrived during the Late Jurassic period, specifically in the middle Kimmeridgian stage, approximately 154 million years ago, within northern Germany. This dinosaur is a fascinating example of insular dwarfism, a phenomenon that occurs when a population of sauropods becomes isolated on an island within the Lower Saxony basin.

Europasaurus is notably small for a sauropod, with adult specimens measuring just 5.7 to 6.2 meters (approximately 19 to 20 feet) in length and weighing about 750 to 800 kilograms (around 1,650 to 1,760 pounds). These size estimates were derived from a partial femur, which was scaled in comparison to a nearly complete Camarasaurus specimen. There is evidence of younger individuals as well, with sizes ranging from 3.7 meters (about 12 feet) down to the smallest juvenile at 1.75 meters (approximately 5.7 feet).

The reduced body size of Europasaurus is believed to be a result of its ancestor's rapid adaptation to life on an island that existed in the region around northern Germany. This island was relatively small, with an area of less than 200,000 square kilometers, possibly insufficient to sustain a community of larger sauropods.

Unfortunately, part of the Europasaurus fossil collection suffered damage or was lost in a fire caused by arson on the night of October 4th to 5th, 2003. This incident resulted in the destruction of the laboratory and exhibition hall at the Dinosaur Park Münchehagen, leading to the loss of 106 bones, which accounted for approximately 15% of the bones that were being prepared at that time.