Rhomaleosauridae is a family of pliosauroid plesiosaurs from the Earliest Jurassic to the latest Middle Jurassic ( Hettangian to Callovian stages ) of Europe , North America , South America and possibly Asia .
Head entity: hettangian Q633834 17
Tail entity: earliest jurassic Q284787 9 10
Relation (head \u2192 tail): P361
Inverse relation (tail \u2192 head): P527