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Acrocanthosaurus, claw of hand PachycephalosaurusAcrocanthosaurus (meaning "high spine lizard" because of the spikes growing out of its spine) was a fierce predator that was roughly 30 40 feet (9 12 m) long and weighed about 5,000 pounds (2300 kg). It had a big head, with a 4. 5 foot (1. 4 m) long skull and 68 thin, sharp, serrated teeth. It had 17 inch (43 cm) spikes extending from its vertebrae, along the neck and tail that may have formed a thick, fleshy sail on its back. It had powerful arms,
scissor-like cutting jaws with serrated
increasing their strength
It is the animal from which the subfamily Machairodontinae gets its name and has since become a wastebasket taxon over the years as many genera of saber tooth cat have been and are still occasionally lumped into it
Late Jurassic
" an appropriate descriptor
Duckbill skin & bone
light weight
Only about 10 complete and partial specimens have been found
including at least twenty partial to complete skulls
The largest tooth is 2
Following the global mass extinction at the Silurian boundary
The prints are documented in Appendix B of Bigfoot expert Loren Coleman's book: "Bigfoot: The True Story of Apes in America"
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