The 1st claw of the Utahraptor was thought to be a rib--they grew 'em big in this period, from Latin for "chalk"
.... since the 1980s where an enlarged thumb claw was first put on the foot, 
as in... [DOC] [TLE] 3,000 year old turtle skeleton, 11 ft long by 7 ft wide | Dinosaurs ... [PAR] The 14 foot wombat: First complete skeleton of prehistoric monster found in 
Australia ... Scientists say they may have unearthed the fossilised skeletons of up 
to 40 giant ... grew a third longer and survived 30 million years longer than 
thought.