Re: Iguanodont queries

[Richard Butler <rbut02@esc.cam.ac.uk>]

On 5/18/03 4:33 PM, "Nick Gardner" <ratites637@hotmail.com> wrote:

> 
> I would appreciate assistance with these queries, even though they are not
> necessarily the normal for this group.
> 
> 
> 
> 1.  In the original description of _Draconyx_, O. Mateus and M. Antunes
> unite it with the Camptosauridae on the basis of two characters, 1)
> maxillary teeth with strong vertical primary ridge on the distal side of the
> labial crown and 2) femur curved with prominent lesser trochanter.  Is the
> first character a more well-developed version of the primary ridge developed
> in more basal taxa or is it a different structure entirely?  Does anyone
> have any pictures of the teeth and femur of _Camptosaurus_ and other
> camptosaurids for comparison that they could send me?  I would be very
> appreciative.
> 
> 2.   Though I recognize that _Bactrosaurus_ is now considered more basal,
> what characters were originally used to unite with the Lambeosaurines and
> are they invalid or valid?
> 
> 3.    Does anyone have any pictures of the material for _Mandschurosaurus_?
> If you know the original citation, it would be helpful if you posted it too,
> and I can try track it down over the summer.  And... uhm... what is
> _Mandschurosaurus_?
> 
Taken from Norman and Sues (2002) 'Ornithopods from Kazakhstan, Mongolia and
Siberia' in The Age of Dinosaurs in Russia and Mongolia, Cambridge
University Press:

"Hadrosauridae incertae sedis or nomina dubia
Genus Mandshurosaurus Ryabinin 1930
Type Species Trachodon amurense Ryabinin, 1925.
Mandschurosaurus amurensis (Ryabinin, 1925)
The type material of this taxon is very poorly preserved and its distinction
appears to rest upon the relatively low number of vertical tooth rows in the
jaws (35) in addition to generalized hadrosaurid anatomical features.
Ryabinin (1930a) proposed Mandshurosaurus for the reception of Trachodon
amurese Ryabinin, 1925. The holotype comprises the poorly preserved,
disarticulated remains of a skeleton from the Late Cretaceous conglomerates
at Blagoveshchensk on the right bank of the Amur River opposite the villages
of Kasatkino and Sagibovo in Manchuria. The material descibed by Ryabinin
(1930) consists of an incomplete braincase, fragmentary dentaries, dorsal,
sacral and caudal vertebrae, two ribs, and a number of bones from the fore-
and hind- limbs. The type material does not appear to be taxonomically
informative and was regarded as a nomen dubium by Weishampel and Horner
(1990).
In recent years there have been reports of new discoveries, either at the
original site, or from adjacent localities (Bolotskii and Moiseeko, 1988).
Photographs of these finds suggest more, and better preserved material has
now been discovered. Ralph molnar (pers comm., 1997) also indicates that
sufficient material has been found to mount at least two skeletons"

Ryabinin (1925) [Discovery of the skeletal remains of Trachodon amurense sp.
Nov.] Geologicheskii Komitet, Izvestiya 45: 1-12
Ryabinin (1930) [Review of the dinosaur fauna collected from Amur river]
Zapiski Rossiiskogo Mineralogicheskogo Obshchestva 59: 41-51
Bolotskii, Y.L. And Moiseenko, V.G. 1988. [Dinosaurs from the Amur River]
Akademiya Nauk SSSR: Blagoveshchensk: 39pp




> 4.  Is _Tanius_ still a valid taxon? If so, what is it?  Can someone post
> the original citation?
> 
> 
Wiman, C.1929. Die Kreide-Dinosaurier aus Shantung: Palaeontologica Sinica,
6:1-67


> 
> Thanks in advance
> 
> 
> 
> 
> nick gardner
> = paleoartist
> = paleogeek
> 
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