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Mickey Rowe | 1 Aug 2004 09:01
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Dinosaur List Administrative Message

This file was last touched July 1st, 2004.

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Rather than sending the whole long administrative message each month
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that I expect to be the most popular.  If you wish to see the entire
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Contents:

1.  How to unsubscribe
2.  How to subscribe
3.  How to receive the list as a digest
4.  How to access the archives
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h0662eka | 1 Aug 2004 11:44
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Pterosaur eggs and ankles

Pterosaur eggs and ankles.

In light of recent comments on the pterosaur egg from the Yixian Formation of 
China, described a few weeks back by Wang and Zhou in Nature (2004, vol 429, p. 
621) perhaps it is worth pointing out that, so far as I am aware, with the single 
exception of David Peters, this fossil is universally accepted to be a pterosaur 
embryo in an egg. Admittedly, this is rather obvious from the preservation of the 
embryo in an egg-like structure, but there are other lines of evidence, not least 
the unique arrangement of the skeleton in this pterosaur, with the fore limbs 
folded up around the body on either side,a position that is typical of pre-
hatchling individuals in oviparous amniotes. There is much, much more to come in 
the pterosaur egg story, some of it will confirm what we already know (and how!) 
and some of it will no doubt become public at the SVP meeting later this year. 
I'll keep y'all posted. 

Alex Kellner kindly sent me a PDF of his pterosaur ankle paper, which I have now 
finished reading. I broadly agree with all his main points and am aware of 
further material from one of the basal-most pterosaur clades that supports his 
contention that the pterosaur ankle joint he describes for Anhanguera and 
Tapejera is universal for pterosaurs. It will be very interesting to see how the 
several ankle joint characters discussed by Kellner affect out understanding of 
pterosaur relationships to other diapsids - cladistic analyses are underway 
(literally as I write) and preliminary results tend to support the 'pterosaurs 
are ornithodirans' hypothesis. I prefer to keep an open mind on this issue, but 
would accept that the data that has come out recently does seem to be drifting 
things toward the Ornithodira. 

Toodle pip. 

Dave
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Thomas de Wilde | 1 Aug 2004 19:22
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Mixosaurus

Thanks to everyone who helped me with cymbo
Now it's Mixosasaurus's turn

species

M.cornalianus (type)(orig. Ichthyosaurus) (Bassani, 1886) Baur 1887 (? Mixed
lizard)
M.kuhnschnyderi (orig. Sangiorgiosaurus) Brinkmann, 1998 (Kuhnschnyder's?
mixed lizard)

remains: ?
fossilsites: Swiss & Italy: Monte San Giorgio
                China
                Possibly New Zealand

Missasigned species

M.atavus (old mixed lizard)(orig. Ichthyosaurus) = Contectopalatus atavus
M.maotaiensis = M.cornalianus
M.natans = Phalarodon nordenskioeldii
M.nordenskioeldii = Phalarodon nordenskioeldii
M.nordenskjoldi = Phalarodon nordenskioeldii

unnamed species (any idea if they have been synonymized or named yet)

M.sp.(Lower triassic of Canada)
M.sp. (Middle triassic of Switzerland)

Other names:
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Steve White | 2 Aug 2004 11:27
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RE: A SOUND OF THUNDER

Keeping in line with Dan's Turok email, a pretty solid Sound of Thunder 
trailer is now available at the following:

http://scifi.com/scifiwire/art-main.html?2004-07/23/12.10.film

No much in the way of dino action, and the T-rex looks more like Walking 
with Dinosaur's Big Al to me. But I'm sure we'll all go and see it anyway...

Steve

Steve White

Tel: +44 (0) 207 564 5033
http://www.gn.apc.org/thunderlizard/index.html

3 Tiffany Court
67 Oakhurst Grove
East Dulwich
London
SE22 9AG
UK

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Craven, David | 2 Aug 2004 11:31
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RE: A SOUND OF THUNDER

The fact the T.rex looked like an Allosaurus occured to me too. Maybe they
just got REALLY lost (in time).
They've certainly gone way off the original story, but it could be a laugh
anyway.

David Craven

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david peters | 3 Aug 2004 00:42
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re: pterosaur eggs and ankles

David Unwin wrote:

with the single exception of David Peters, this fossil is universally accepted to be a 
pterosaur embryo in an egg. 

>>>>>>  I may be the only reader of Nature who actually tested the finding. Nevertheless, looking forward to
more data to come, as you suggest it is.

cladistic analyses are underway (literally as I write) and preliminary results tend to support the
'pterosaurs 
are ornithodirans' hypothesis. I prefer to keep an open mind on this issue, but 
would accept that the data that has come out recently does seem to be drifting 
things toward the Ornithodira. 

>>>>> You're such a tease, David!  Just find me one archosaur with an elongated pedal 5.1, a prepubis, a
solid, fused ventral pelvis, manual digit IV longer than III, and a naris displaced away from the rostral
tip (no spinosaurs, please) and I'll be on board (or at least have grave misgivings about the protorosaurs).

Best, always,

David Peters

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James R. Cunningham | 3 Aug 2004 13:36

pteroid

Does anyone have a copy of Dino Frey's paper that interprets the pteroid
as a thumb?  I don't know which journal it was in, and haven't had any
luck previously at contacting Dino by e-mail.
Thanks,
Jim
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David Peters | 3 Aug 2004 14:53
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question about Carroll 1988, scap/cora

Page 270 of Carroll 1988, Vertebrate Paleontology and Evolution,
includes a confusing caption below a drawing of a Chasmatosarus (basal
Archosauromorph) shoulder girdle, apparently with fused scap/coracoid
and only a thin seam line betraying the boundary between the two.

"Figure 13-12. (a) Pectoral girdle of Chasmatosaurus (Proterosuchus) in
lateral view. In general it resembles the shoulder girdle of eosuchians
[fused scap/cora?]. The cleithrum is lost, but the clavicle and
interclavicle remain large. The scapula and coracoid are not coosified
in adults."

Question: Does this mean the apparently coosified scap/cora in figure
13-12a is immature? And if so, does this taxon lose coosification with
increased age and weight bearing?

Perhaps this is a mistake on Carroll's part. I don't know.

Can someone please clarify this?

David Peters
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Andrew A. Farke | 3 Aug 2004 15:50
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GSA Abstracts Posted

The hot-off-the-press abstract listing for the 2004 Geological Society of
America meeting has some entries that may be of interest to the list. Full
listings (and additional abstracts--I've only included a small subset here)
are posted at http://gsa.confex.com/gsa/2004AM/finalprogram/

****************************************
THE INFLUENCE OF SOCIAL AND POLITICAL CONTEXT IN DINOSAUR PALEONTOLOGY 
FASTOVSKY, David E.

ASSESSING THE IMPACT OF DIAGENESIS ON CARBON ISOTOPE RATIOS OF DINOSAUR
TOOTH ENAMEL: A CASE STUDY FROM THE HELL CREEK FORMATION IN NORTH DAKOTA 
ECHT, Susan and FRICKE, Henry 

USING BURIAL EXPERIMENTS TO UNSCRAMBLE DINOSAUR EGG TAPHONOMY 
SOJA, Constance M.1, SUNDERLIN, David2, and CLOSE, Stephen J.1,

PALEOENVIRONMENTAL ANALYSIS OF A MORRISON FORMATION DINOSAUR SITE, BIGHORN
BASIN, WY: CONDUCTING AN INTERDISCIPLINARY FIELD STUDY THROUGH DISCIPLINARY
TASKS 
DEMKO, Timothy M.1, BODENBENDER, Brian E.2, BAAR, Eric E.3, HOLBROOK, Cody
W.4, KUBAREK, Sara J.1, MURPHY, Jennifer5, RAMIREZ, Elisa M.6, SCOTT, Justin
E.7, SWOR, Emily1, and YONOVITZ, Maureen2, 

ESTIMATING ABSOLUTE DIVERSITY: HOW MANY DINOSAUR GENERA WERE THERE? 
WANG, Steve C., DODSON, Peter

A PALYNOLOGIC PALEOENVIRONMENTAL ANALYSIS OF A DINOSAUR BONE-BEARING BED
FROM THE CRETACEOUS HELL CREEK FORMATION, MONTANA 
PRESSLER, Rebecca E,
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Mike Taylor | 3 Aug 2004 16:09
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Palaeontology Volume 47

Hi, all,

As a member of the Palaeontological Society (UK), I have been sent all
four issues of the society's journal, _Palaeontology_, for the last
year, being volume 47 issues 1-4.

Unfortunately, from my sauropod-o-centric perspective, it might just
as well be called The Journal Of Small Boring Invertebrates :-)  They
look very nice on my shelf, but realistically I can't imagine that I
will ever read them, so if anyone else out there wants them, they're
yours for the price of postage.

The set weighs a tad over 3kg, so we're looking at something like £7
to post within the UK; or, to send to the USA, something closer to £28
air-mail or about half that surface-mail.  Or you can just pick them
up yourself if you live in, or are visiting, London.

Let me know off-list if you'd like them.

 _/|_	 _______________________________________________________________
/o ) \/  Mike Taylor  <mike <at> indexdata.com>  http://www.miketaylor.org.uk
)_v__/\  "[Z39.50] really is terribly droll, is it not?  You would
	 think that it all existed solely for our amusement" --
	 Sebastian Hammer.

--
Listen to free demos of soundtrack music for film, TV and radio
	http://www.pipedreaming.org.uk/soundtrack/
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