E. holgeri, named in 2006, is distinguishable from other sauropods such as Camarasaurus because of an evolutionary trend on small islands, where less resources than a large animal would need force the animal life to shrink, making Europasaurus the smallest macronian sauropod. Europosaurus was indeed small; its total length was only 6 metres or nearly 20 feet, & its shoulder height was level to an adult human's. Due to its smaller body, the neck looks disproportionately long.

Europasaurus was discovered in a bonebed as a herd. One suggestion has been that the herd was swept out to sea from a beach, drowning before becoming buried in the seabed. The only land near where the herd would have perished was a chain of small islands, the largest 200,000 km2, or 124,300 square miles. An area this small would have not been able to support Europasaurus' larger ancestors, forcing them to depreciate in size.

Stephen Frost