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Acrocanthosaurus / Becklespinax

I was looking for some information in ' the Dinosauria ' when I came upon
an illustration of the dorsals assigned to Becklespinax altispinax . Has
anyone compared these dorsals to A.atokensis or B.walkeri ? The time frame
(Barremian) fits B.walkeri, but could also fit an ancestor of A.atokensis .
Thanks in advance . 
Regards , 
Truett Garner