questions about the Odontochelys study

[David Peters <davidpeters@att.net>]

Was wondering which species the authors used when they say that  
turtle blood tests link them with 'diapsids'?

and

Was wondering which species Rieppel used when he linked turtles to  
lepidosaurs or squamates and sauropterygians?

and

How many millions of years link turtles to their closest known sister  
taxa?

David Peters
davidpeters@att.net