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RE: Hadrosaur nomenclature
From: email@example.com [mailto:firstname.lastname@example.org]On Behalf Of
Sent: Tuesday, October 16, 2001 10:48 AM
To: Dinogeorge@aol.com; email@example.com
Subject: Re: Hadrosaur nomenclature
Ok...guess I need to do something here, again.
>Maiasaura = Brachylophosaurus<
>I admit I don't know much about hadrosaurs, so maybe this is old, but I
haven't heard it before. What's the reasoning behind this
> Because the look similar. I'm not being smart. The Mor adult Maiasaura
skull is crushed dorsal-ventrally. ROM has a new uncrushed skull that really
really looks like Brachylophosaurus without that crest in the back.
Arg... Hello not that similiar. That specimen is not that new. 93/94/95 or
so when it was acutally found. Is also, the same speciman that has the skin
impressions that show a "waddle" (loose skin under the neck).<<
Right, but nobody using this good skull, just the old MOR crushed skull.
>Fun thought: Brachylophosaurus is a male Maiasaura (or vice versa). Boy, we
really don't know >anything< about dinosaurs, do we?
<cough>bs<cough> Well maybe you...<grins>.
1. _Brachylophosaurus_ is a JUDITHIAN Dinosaur.
2. _Maiasaura_ is a TWO MEDICINE Dinosaur.
3. Same time period yes. Different Enviroments yes.<
Doesn't mean a darn thing. There are several living genera that live in
different environments, but are the same animal or closely related.
>>4. No Two Medicine Dinosaur has been found outside of the Two Medicine
formation.(fragmented and isolated teeth dont count, cause you cant use them
to determine actual specimens!.. ex:Troodon)>>
Edmontonia, Euopolocephalus, pachycephalosaurids, etc.
>>5. There are two types of Maiasaurus skulls a broad and a narrow
Love to see it. Like Prosaurolophus skulls? P. maximus has a narrower snout
then P. blackfeetnessis (sic)
>>6. Both animals, Frontal, Postorbbital, Jugal, Premax, Nasal, Maxilla, are
very different. Can see that when you look at both skulls together.<<
Hope the paper is in the works somewhere.
>>7. Brachylophosaurus has small flat crest that begins before the orbit and
continues back past the post-orbit.
8. Maiasaurus has a well it doesnt really have much of a crest. The bone
that makes up the crest is a bit procurved. It lays right before the orbit,
curves forward abit.<<
So, doesn't mean they aren't closely related.
>>9. The nasal opening in Brachylophosaurus is longer.
Tracy L. Ford
P. O. Box 1171
Poway Ca 92074