Xenoposeidon proneneukos is a sauropod dinosaur from the Early Cretaceous period. Notable for its distinctive vertebrae, it likely roamed the open plains of what is now England. While specific details on its behavior remain speculative, it is believed to have been a herbivore, contributing to the balance of its ecosystem.

Xenoposeidon proneneukos is a genus of sauropod dinosaur that is known from the Lower Cretaceous period, approximately 140-125 million years ago. Its fossils have been discovered in the Wealden Group of the Hastings Beds Formation in East Sussex, England, which is part of the larger Weald Basin in Southern England.

During the Early Cretaceous period, the Weald Basin was characterized by a warm, humid climate with abundant rainfall. The environment was predominantly a floodplain with a mix of river channels, lakes, and swamps. The area supported lush vegetation, including conifers, ferns, and cycads, contributing to a rich ecosystem.

Xenoposeidon, like other sauropods, was a herbivorous dinosaur that likely fed on the diverse plant life available in its habitat. Its ecological niche would have involved browsing for vegetation, possibly contributing to the shaping of the plant community through its feeding habits. As a large quadruped, it would have been well-adapted to the open landscapes of the floodplain, using its long neck to reach various heights of vegetation.