There is a prominent plastral hinge that allows the turtle to completely close the front of its shell.
(a prominent plastral hinge; allows; the turtle to completely close the front of its shell) Context(a prominent plastral hinge allows,List([9, 47))):(the turtle; to completely close; the front of its shell)
a prominent plastral hinge allows,List([9, 47))
a prominent plastral hinge the turtle
allows to completely close
the turtle to completely close the front of its shell
the front of its shell