It is often possible to reconstruct disarticulated individuals, particularly the marginal frames of Goniasterids whose shape varies predictably with their position in the frame.  Ossicles which grew against one another in life mould into their neighbour to varying degrees, aiding a confident reconstruction.

1).  This small and incomplete example of Crateraster quinqueloba has been reconstructed from a disarticulated specimen (x5).  Randell Collection, RR0113.