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TRIASSIC GIANT SAUROPODS, ORNITHOPSIS
First off, don't think this has been reported on the list
Buffetaut, E., Suteethorn, V., Le Loeuff, J., Cuny, G., Tong,
H. & Khansubha, S. 2002. The first giant dinosaurs: a large
sauropod from the Late Triassic of Thailand. _C. R.
Palevol_ 1, 103-109.
I heard about this a while ago but have just got a reprint
from Sasidhorn (last author in above), currently based here
at UOP working on _Valdosaurus_. A humerus from the
Nam Phong Formation is 1040 mm long and thus
suggestive of a _Camarasaurus_-sized animal 12.6 m or so
long, or more if different proportions are assumed. They do
not suggest that the humerus is referable to _Isanosaurus_
but this is obviously possible. The paper includes some
speculations as to why sauropods got so big and they note
that sauropods attained giant size faster than did other
Mike Taylor wrote...
> Can anyone explain how the titanosauriform Ornithopsis -- known only
> from a couple of dorsal verts on display at the NHM, London -- came to
> be called "bird face"?
It's actually 'bird likeness' or 'bird appearance' and was
coined by Seeley (1870) because he thought that the type
vertebra (the caudal dorsal BMNH 28632) was from a giant
Seeley clearly thought (correctly) that, like birds, pterosaurs
and sauropods were pneumatic. This may be why Owen
gave the name _Chondrosteosaurus_ to further Wealden
sauropod material in 1876. _Chondrosteosaurus_ means
'cartilage and bone lizard' and reflects Owen's view that
pleurocoels were occupied by cartilage, not air.
See Naish, D. & Martill, D. M. 2001. Saurischian dinosaurs
1: Sauropods. In Martill, D. M. & Naish, D. (eds)
_Dinosaurs of the Isle of Wight_. Pal. Ass. (London), pp.
Also article in press for the sauropod special issue of
_Quarterly Journal of th Dinosaur Society_.
School of Earth & Environmental Sciences
University of Portsmouth
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PO1 3QL www.palaeobiology.co.uk