The Cave Lion (Panthera spelaea and Panthera fossilis)

[tigerluver]

(12-09-2018, 07:17 AM)Ghari Sher Wrote:

(12-09-2018, 06:45 AM)tigerluver Wrote: @Ghari Sher , great post! P. spelaea, at the diaphysis, seems to have the thickest bones. At the epiphysis, off the top of my head all the lion-like cats are more similar in robusticity but the extinct species were again a bit thicker. As a recommendation, when calculating robusticity try using "ratio/index = bone width/bone length". This is more conventional as the greater the ratio, the greater the robusticity. Another issue to note is that the diaphyseal diameter differs between researches. Some assume midshaft diaeter equals the least diameter of the diaphysis and others actually find the point where the diameter is truly the least, confounding comparisons a bit. I am short on time so I apologize for not being to write a more in depth response at the moment but I wanted to make sure to acknowledge the great work.

Thanks!

On the shaft diameter - yes, I did notice that, some authors wrote down the midshaft, whereas reading Dawkins 1866 I see he uses the width nearer the base of the humerus as a measurement in his data, still comparable to the shaft widths in more recent works though.

The most uncertain time is when the author writes "least diameter" but off the record assumed that to be the midshaft diameter. Not that I blame them, trying to find the true least diameter would be much too time consuming for most. The measurement truly is at the mercy of the measurer. Reply