Nicknamed "Wet Willi," the skull and fossils belong to Dimetrodon giganhomogenes.

这一化石骨骼和头骨被昵称为“WetWilli”（潮湿威利），它们属于一种长棘龙（Dimetrodon giganhomogenes）。

Well-preserved fossils like this of Dimetrodon are rare, according to the researchers.

研究人员表示，保存如此完好的化石相当罕见。

A sail-backed dimetrodon forages amid a Permian landscape in this artist's depiction.

船帆支持的异齿龙牧草中二叠纪景观在这方面艺术家的写照。