That is wrong... WRONG wrong!
Dinosaurs, the ancestors of birds, were warmblooded. Scientists aren't sure when the transition took place, much like when we're not sure when mammals stopped laying eggs instead of raising them within the wombs.
There were times of snow during the Mesozoic. If there weren't, where would feathers come from on Coelurosaurian dinosaurs? This group includes Tyrannosaurids and while they may not have been giant feather beasts, they were insulated.
Dinosaurs are also very far from lizards. They, their avian descendants, along with crocs and pterasaurs are a clade known as Archosaurs.
If anything, the KT impact irradiated the planet for a time and choked out the sun not with fire, but with fumes. A sort of nuclear winter.
As such, I'm not sure about much of the type chart in this regard, but my answer for ice will almost always be my answer for ice: it should resist it.
Whoops. Apparently this was only discovered in July 2013*, and I don't follow news. And I haven't learned anything about dinosaurs for a good 4 years. Sorry.
SCRATCH MY LAST POST
Doing a new thing
(and I actually had absolutely no clue, so thanks)
EDIT= * means that's when the article I found came from
DOUBLE EDIT= Okay, these are my new opinions.
Fire: Fire might still be SE against Dino. Touching lava hurts.
Dino is neutral to fire? I guess?
Ice: Okay, Ice isn't SE against Dinos. NVE seems weird to me. Neutral would be best. But I think that's just because I think it should be different from Dragons.
Ice should resist Dino. Balance. Not much flavor here.
Poison: Some animals DO resist poison, no matter whether it is a lizard or not. But some don't. Poison is neutral against Dino.
Not sure how Dino should affect Poison.
Steel: Steel is neutral against Dino. I guess.
Dino is SE against Steel? They could probably crush it.
Once again, I apologize for not knowing about dinosaurs. If anything here is wrong, feel free to call me out.