[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
Re: Sauropod spines
1) how far might this trait extend into sauropoda? - Your guess is as good
as mine. Diplodicus is the only sauropod currently known with these spines,
and it is notoriously hard to plot a curve from a singe point. I would say
this, it is unlikely that the spacing, height, and placement of the spines
would be consistent amoungst the sauropoda, even if their presence is
2) are these spines elongated scales, as in the iguana's spines or bony
scutes, as in the spines of stegosaurs?. - Definantly not bony plates ala
stegosaurs. I don't know of any topological impressions found on the
spines, so whether they were elongate keratinous structures (like scales) or
some other soft tissue (like cartilage) covered with skin seems undecided.
Perhaps someone online has seen the firsthand?
3) are these spines associated with the vertebrae under them? That is, does
every vert have a specific number of spines? - Apparently not as far as they
are known. Over the tail, there seems to be more spikes than vertebrae.
Again, if you want to assume a broader distribution of these characters
amoungst Sauropoda, then I would suspect that this varies a bit. Hopefully
future finds will shed some light.
One last thing, everybody has been puting these only on the dorsal midline
of Diplodicus. Certainly on the whiplash this seems to be the case, but
it's been mentioned to me that the number of elements found that weren't in
direct association with the body are great enough that these spikes may have
extended to other parts of the body.
Get your FREE download of MSN Explorer at http://explorer.msn.com