Archaeopteryx perhaps, to a cartilaginous sternum. The sideways orientation of the glenoid (shoulder) joint between scapula, coracoid, and humerus—instead of the dorsally angled arrangement found in modern birds—may indicate that "Archaeopteryx" was unable to lift its wings above its back, a requirement for the upstroke found in modern flapping flight. According to a study by Philip Senter in 2006, "Archaeopteryx" was indeed unable to use flapping flight as modern birds do, but it may well have used a downstroke-only flap-assisted gliding technique. "Archaeopteryx" wings were relatively large, which would have resulted in a low stall speed and reduced turning radius. The
Specimens of Archaeopteryx 1998, Vieser 1988). The Eichstätt specimen of "Archaeopteryx" is represented by an almost-complete skeleton visible on both slab and counter-slab, though the majority of the skeleton is on the main (overlying) slab. The animal is preserved lying on its right side, as in the Berlin specimen. The specimen is in almost complete articulation with many items in their original positions. The vertebral column, which had become strongly recurved in death, enabled the animal's head to lie above the pelvis in near-perfect preservation. This excellently-preserved skull is one of the most notable features of this specimen. The majority of the Eichstätt