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RE: Dinosaur tail traces.review



I would think both hind feet would be placed together.
So .. again .. how would you go about testing this ?!?

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> Date: Wed, 4 Sep 2013 09:07:19 -0600
> From: rtravsky@uwyo.edu
> To: dinosaur@usc.edu
> Subject: Re: Dinosaur tail traces.review
>
> On 9/4/2013 12:14 AM, dale mcinnes wrote:
>> I always assumed that this was a shift in posture ..
>> slowing down .. sniffing the air for odours by positioning
>> the nostrils higher. This would neccesitate a slowing of
>> forward momentum as well. The abstract sort of suggests that
>> the animals were still moving forward.
>>
>> You know .. I've seen this in the Peace River canyons in B.C.
>> The animals weren't stopping. They were big ornithopods [Gething
>> Form. .. Aptian times].
>>
>> There was one apparently [? stalking] if you want to call it
>> that [metatarsals were clearly visible] but it was still moving
>> forward with no trace of tail drag.
>>
>> I'm willing to bet that we're looking at a radical change in
>> posture. Unfortunately .. don't have a clue how you could test
>> this ..
>
> Whoops, sent a reply but meant it for the list.
>
> The abstract says the animals' speed was slow. What occurred to me was
> this might be a form of marking, lik scratches on a tree, or scratching
> over urination/defecation. Perhaps even scent marking.
>