Remains of taxa that can be confidently assigned to Istiodactylidae have been found in the UK and China , in rocks dating from the Early Cretaceous period ( Barremian to Aptian stage ) .
Head entity: barremian Q732702 28
Tail entity: early cretaceous Q752187 24 25
Relation (head \u2192 tail): P527
Inverse relation (tail \u2192 head): P361