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Dinosaur size and our own growth


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#46    Mattshark

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Posted 17 January 2007 - 09:24 PM

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Dinosaurs were not reptiles. They are archosaurs. They have an extra chamber of the heart, and are most likely warm-blooded. Who said they couldn't of been ambush predators?

Yep, they are diapsids, the term reptile is considered to be polyphyletic and not a true group.

Should be pointed out that dimetridon is a mammalian descendent not one of lizards snakes etc, which are all diapsids, dimetridon is a synapsid.

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#47    capeo

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Posted 19 January 2007 - 04:36 PM

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Should be pointed out that dimetridon is a mammalian descendent not one of lizards snakes etc, which are all diapsids, dimetridon is a synapsid.


Yeah, Dimetrodon was like the worst example to pick.  My bad.

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#48    speshall mareens

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Posted 20 January 2007 - 04:31 PM

synapsids aof that time were still cold blooded, only the mammal like reptiles were beggining to become warm blooded. dimetrodon probably used its sail to warm up or cool down as it was not warm blooded

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#49    frogfish

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Posted 20 January 2007 - 09:29 PM

But dinosaurian archosaurs may of been warm-blooded. They did have more chambers than other archosaurs.

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#50    speshall mareens

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Posted 21 January 2007 - 04:00 AM

I'm gonna turn you into poo!!! while these animals were smart there prey was getting smarter to, as well as there predaters. in order to survive one must be smart. for instance a small dinosaur feeding on shrew like mammals still had to avoid smart raptors and larger mammals ( one has been discovered that was the size of a dog) www.livescience.com i don't know the exact link so it should be under animal kingdom or dinosaurs. towards the end of the cretaceouse period there was a battle of size in the giants and of brains in the smaller ones.really what sets us apart is the control of fire, large brains, apposable thumbs, sense of humor, greed, greef, and ability to solve problems.

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#51    speshall mareens

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Posted 21 January 2007 - 04:08 AM

i was looking at a different page when i replied sorry, yes archosaurs may have been warm blooded, but we can't even deside on the bloodedness of dinos, yet tis mostly believed to be warm. if they were warm blooded explain dimetrodon and edmontosaurus, to sailed animals living in the same area coexisting. that points towards the sails being used to warm them up or cool them off, pointing towards cold bloodedness. yet without a doubt some archosaurs and synapsids were warm blooded. preferibly the ones with legs under there body. not because it is a side result, or proof of warmblooded, but that it represents progress in evolution and therefor warm bloodedness. may i also point towards the animals of today and the position of legs compaired to warm or cold bloodedness. just a speculation though.

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