Foster used an equation provided by J . F . Anderson and colleagues to estimate mass from femur length, which yielded an approximate weight of for " C . magnicornis " and for " C . dentisulcatus ".
12.
In 2010 a second specimen, of a juvenile, was announced, that proved that a more elongated tail was present after all, albeit not so long as the faked tail of the holotype : about 85 % of femur length.
13.
For example, " Tianyuraptor " has a tibiotarsus / femur length ratio of greater than 1.30, while " Velociraptor mongoliensis ", a creature of similar size, exhibits a ratio of less than 1.10.
14.
Zanno and Mackovicky ( 2013 ) using other megaraptoran taxa as a proxy, estimate the femur length of the holotype specimen FMNH PR 2716 at 11.9 meters long, and using a femur circumference regression, estimate its mass at roughly 4 tons.
15.
Although its remains are from a very small individual, with a femur length of ~ 8 centimeters ( 3.1 in ) and an estimated overall length of about 60 cm ( 2 ft ), the fused bones in its skull suggest that it was an adult at death.
