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Name a dinosaur with three horns

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Ian Dunn
730897.  Sun Aug 01, 2010 3:02 pm Reply with quote

Forfeit if you said "triceratops".

According to John Scannella and Jack Horner at the Museum of the Rockies in Bozeman, Montana, what we refer to as a triceratops is actually a juvenile form of torosaurus.

New Scientist wrote:
As the animal aged, its horns changed shape and orientation and its frill became longer, thinner and less jagged. Finally it became fenestrated, producing the classic torosaurus form.

There is evidence to support this theory, in that no-one has ever discovered a young torosaurus.

Sources: Gizmodo and New Scientist

Spud McLaren
730901.  Sun Aug 01, 2010 3:16 pm Reply with quote

Ian Dunn wrote:
There is evidence to support this theory, in that no-one has ever discovered a young torosaurus.
Isn't that equating absence of evidence with evidence of absence?

Alfred E Neuman
730922.  Mon Aug 02, 2010 1:51 am Reply with quote

Whether a triceratops is a young torosaurus or not, it still has three horns.

731306.  Tue Aug 03, 2010 12:03 pm Reply with quote

Research /argument of John Scannella and Jack Horner in New Scientist article, linked below.

"Triceratops had three facial horns and a short, thick neck frill with a saw -toothed edge. Torosaurus also had three horns, though at different angles, and a much longer, thinner, smooth -edged frill with two large holes in it."

But also:

"Torosaurus will now be abolished as a species and specimens reassigned to Triceratops," says Jack Horner.

There are numerous dinosaurs that are now thought to have been shape -shifters throughout their lives and look remarkably different at adulthood when compared to their juvenile counterparts. Hence many which were classified as different species are now thought to be the same species.

New Scientist

731356.  Tue Aug 03, 2010 1:54 pm Reply with quote

I bet in the future there'll be a further reclassification and the former species will become species once more.

731358.  Tue Aug 03, 2010 2:23 pm Reply with quote

Jack Horner - isn't he an expert on Christmas pies and plums too?

Curious Danny
731489.  Wed Aug 04, 2010 8:10 am Reply with quote

Technically, Triceratops was discovered first and thus, torosaurus does not exist. Therefore, no forfeit for me ...

731636.  Wed Aug 04, 2010 6:00 pm Reply with quote

There are many research documents on dinosaur research. Scannella/Horner are only two of many researchers.

What I cannot understand is that there a references to fully grown Triceratops in many sources. Were these only partly grown? Some evidence describes an adult Torosaurus as weighing 4 tons whereas an adult Triceratops is quoted at anything up to 9.3 tons.

732481.  Mon Aug 09, 2010 1:08 pm Reply with quote

Since I was a child, I always wondered how anyone could tell the difference between a big dinosaur of one kind and a completely different species. I guess the answer is that they can't.

Sadurian Mike
732976.  Wed Aug 11, 2010 3:14 pm Reply with quote

Apart from the Emosaurus.

733045.  Wed Aug 11, 2010 6:04 pm Reply with quote

I'd love it if someone drew an Emosaurus.... it would have some kind of hair covering its eyes, dark rings around them, and a melancholy look... and their mating song would be so very sad. Poor Emosaurus.

But to the triceratops/torosaurus... which is the one that's being abolished?? Is the Torosaurus the young form of the Triceratops or the other way around? Seems to be two differing opinions there. Guess it's like the old Brontosaurus/Apatosaurus problem... and until there's definitive proof, I think I'll be sticking with the triceratops as having three horns. Just because it hasn't been discovered doesn't mean it never existed... there are of course many dinosaurs yet to be discovered.

733077.  Wed Aug 11, 2010 7:27 pm Reply with quote

Nessiteras Rhombopteryx to name but one.

733210.  Thu Aug 12, 2010 12:03 pm Reply with quote

733229.  Thu Aug 12, 2010 1:11 pm Reply with quote

He looks like an alien

733293.  Thu Aug 12, 2010 3:59 pm Reply with quote

:) i was just thinking, i would run towards the water too if a guy like that would come towards me on his motorcycle.


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