[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
Re: Shunosaurus, Tail Clubs, and Ankylosauria
Jerry D. Harris wrote:
<Um...I think I might have missed something here! Last I checked,
there were at least two Jurassic ankylosaurids (_Tianchisaurus_ from
the Middle Jurassic of China , which reportedly has a tail club,>
I was unaware that *Tianchisaurus* had been attributed with a tail
<and _Gargoyleosaurus_ from the Late Jurassic of Wyoming ). Has it
since been shown that the club attributed to _Tianchisaurus_ doesn't
belong there? If so, and you've got a reference, please let me know!>
Sorry. Off the top of my head, here. When thinking "club", and I
included the polacanthine "war-spike" at the end of the tail, I was
unaware of any discovery of a Jurassic form with such. Dealing lately
with Early Cretaceous fauna, I seem to have lost sight of the Jurassic
<Plus, the latest phylogeny of the Ankylosauria  looks something
like this (detail omitted; use mono-spaced font):
N S P a
\ \ \ /
\ \ \/
\ \ /
\ \/ <- node A
Incidentally, where does *Minmi* fit in? It is an ankylosaurid, right?
<Since polacanthines are found in the Late Jurassic (_Mymooropelta_
from the Late Jurassic of Colorado [3, 4]), this means that
ankylosaurids do indeed occur in the Jurassic (although, as far as is
currently known, polacanthines don't have tail clubs -- the
ankylosaurian tail club may not have appeared 'til the Cretaceous if
the club attributed to _Tianchisaurus_ isn't ankylosaurian).>
What shape is the club? I'm up to my ears in theropods and trikes,
so I'm not going anywhere near ankylosaurs at the moment.
< Kirkland, J.I. 1998. A polacanthine ankylosaur (Ornithischia:
Dinosauria) from the Early Cretaceous (Barremian) of eastern Utah, pp.
271-281 _in_ Lucas, S.G., Kirkland, J.I., and Estep, J.W. (eds.)
_Lower and Middle Cretaceous Terrestrial Ecosystems_, New Mexico
Museum of Natural History and Science Bulletin 14. (don't worry
folks; it'll be widely available in about 3 weeks!)>
*Zuniceratops* is published within: do you have the ref for it, even
though it's not available?
Sorry about the mistake,
Jaime A. Headden
Qilong, the website, at:
All comments and criticisms are welcome!
DO YOU YAHOO!?
Get your free @yahoo.com address at http://mail.yahoo.com