Theropods and Birds showing a change in kinds

Hi all,Pardon my intrusion (and pickyness) but I just had to correct the spelling for some of the skeletal structures in that picture of a Campsognathus(?).The term is not furcular but furcula, and not hullus but hallux.The furcula is what you would call a wishbone in a bird. it serves as a means of strengthening the thoracic skeleton - especially in flight.
The hallux is directly equivalent to the human big toe. In most birds it has reversed and acts as an opposable 'thumb'.
Among theropods one can see species that have partially reversed and even fully reversed (bird-like) halluxes.