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re:tail dragging( was cheek pouches)
>At the Clayton, New Mexico trackway there is plain and clear evidence that
>at some times dinosaurs did indeed drag their tails. While this behavior may
>not have been common it happened from time to time. I have photographic
>proof. At this same site there is a set of tracks that seem to indicate a
>shuffling "dance" by an indecisive dino, and in close association there is
>therapod traces. If one were to speculate, or let your imagination run wild,
>one might "see" a harosaur trying to figure out which way to run to try to
>lose a persuing T-rex. If that were the case then the tail might have been
>used for extra support during an abupt stop and turn. This extra "foot"
>would come in handy for a mainly bipedal creature, would it not? Since the
>trackway was a swampy mudflat, when the tracks were laid down, there would
>be little chance of damage to the hadrosaur's tail. Also, in the slippery
>conditions of the mud a little extra traction a strong tail could provide
>seems like a logical use of the tools evolved.
Are you sure this was a tail imprint and not a "baculae" imprint?
Perhaps the shuffling was due to that infamous little dance in front of a