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Re: dino questions



>From: "Pat Grant (Library: Serials Catalog" <PATG@VAX2.CONCORDIA.CA>
 >  P.Dodson (sorry if I spelled that wrong) theorizes
 > that the adult-size skulls lacking these bumps are female, and the
 > ones with the bumps are male. 

That would be my estimate as well.
 > 
 > Swimming dinosaurs: there were pictures of a wading/swimming sauropod
 > in the published proceedings of a conference on fossilized footprints. 
 > Someone had found a set of tracks that appeared to be of a sauropod,
 > and they petered out into mere toe-scrapes.   

I am aware of this trackway, and I almost mentioned it, but there
has been some doubt cast on the interpretation.  It has been
suggested that these are what are called "undertracks", that is
the impressions left in the deeper layers of sediment by a foot-
print that was really made much later, and on a later surface.

Such impressed prints are often reduced in depth and distinctness,
much like one would expect from prints made underwater by a half-
floating individual.
 > 
 > And as for scientific accuracy in toys, etc.: considering how few
 > "facts" are agreed upon by the specialists, how contentious many
 > issues seem to be, and how drastically some of the agreed-upon "facts"
 > are revised every few years, it might be a very frustrating and
 > embarrassing job to be on that committee! 

Enough are sufficiently certain to be relied on.

Except for the front legs of some groups (like certopsians
and stegosaurs), dinosaur legs are held under the body in
an erect stance, not sprawled out to the side.  (And even in
ceratopsians, the issue is controversial).  This will not
change, as it is supported by trackway evidence.

Dinosaurs held their tails up in the air most of the time.
This, again, is supported by trackway evidence.

Ceratopsians, hadrosaurs, and very probably sauropods lived in
herds.  (And quite likely other groups as well).

It is now clear that many, or even most, theropods had some sort
of cranial decorations (ridges, crests, horns, bumps, or rugosities).

 > (And the two kids I know
 > best don't care whether a dino toy is "right" or not, they just want it
 > bigger and brighter-coloured, and more of them.  

On the other hand, a kid I know does care.
When her mother tried to get one of those hideous sauropods
with sharp teeth, she refused it saying that "long-necks
don't eat meat" or something like that.  [So I bought her one
of the excellent Carnegie sauropods for Christmas].

swf@elsegundoca.attgis.com              sarima@netcom.com

The peace of God be with you.