Wikipedia
Patricosaurus
"Patricosaurus" (meaning "paternal lizard") is the name given to a dubious and chimeric genus of reptile from the Early Cretaceous. It is based on a femur and sacrum from two animals: the femur from a large lepidosaur, and the sacrum from an archosaur (Barrett and Evans, 2002). There is no evidence for "it" being a theropod dinosaur, as it is sometimes classified. "It" lived in what is now England. The type species, Patricosaurus merocratus, was described by Harry Seeley in 1887, and was originally thought to have been a lizard.