The coracoid shape is very variable but usually it is rather low.
It is a small, rough projection superior to the glenoid cavity near the base of the coracoid process.
What was initially believed to be a bony sternum turned out to be part of the coracoid, but a cartilaginous sternum may have been present.
It is attached, below, to the upper surface of the coracoid process; above, to the oblique ridge on the under surface of the clavicle.
Only the coracoid and the tarsometatarsus are left today.
The coracoid itself is a beak-shaped bone that is commonly found in most vertebrates with a few exceptions.
As in other flightless birds, the angle between the coracoid and sternum is enlarged.
The scapula is not fused with the coracoid into a scapulocoracoid, indicating that the forces exerted on the shoulder girdle were moderate.
