Talk:Kritosaurini

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Possible early Cretaceous origin?

Not a suggestion to improve the article. --Magnatyrannus (talk | contribs) 17:57, 29 December 2022 (UTC)[reply]

The following discussion has been closed. Please do not modify it.

We know that tyrannosauroids made the journey from North America into South America through Santanaraptor during the albian, so it seems very likely that kritosaurini and saurolophine hadrosaurs as a whole originated during the early Cretaceous and made it into South America at the same time. CuddleKing1993 (talk) 20:54, 12 December 2022 (UTC)[reply]

There are no hadrosaurid fossils that date to the Early Cretaceous, so that comparison is inappropriate. --Magnatyrannus (talk | contribs) 21:01, 12 December 2022 (UTC)[reply]

Maybe we just have no found them yet? CuddleKing1993 (talk) 00:50, 13 December 2022 (UTC)[reply]

Why don't Kritosaurinis look like North American Immigrants?

Per the above. --Magnatyrannus (talk | contribs) 17:58, 29 December 2022 (UTC)[reply]

The following discussion has been closed. Please do not modify it.

Why is that Kritosaurinis do not stand out from the native South American dinosaurs, what makes a Kelumapusaura stand out from a Muttaburrasaurus or a Ouranosaurus? what is different? what makes Bonapartesaurus look like a North American dinosaur? what makes Secernosaurus stand out from the native gondwanan dinosaurs? CuddleKing1993 (talk) 03:54, 29 December 2022 (UTC)[reply]

First of all, Kritosaurini as a clade contains both North American and South American members, so it's inappropriate to take about Kritosaurini as if it's exclusively South American. Kelumapusaura, Bonapartesaurus, and Secernosaurus descended from North American kritosaurins so their external appearance would be similar to North American members like Gryposaurus and Kritosaurus. This also makes them "stand out" from native Gondwanan herbivores, which are usually titanosaurs, elasmarians, parankylosaurs, and notosuchians. Muttaburrasaurus and Ouranosaurus are more primitive (and earlier) ornithopods that crossed into Gondwana way before Secernosaurus and co, and don't have the same adaptations in their skeletons that hadrosaurids have. 2001:4453:5C6:CB00:6DC8:787D:BCB9:420A (talk) 06:44, 29 December 2022 (UTC)[reply]

What makes a Kritosaurini stand out from a native Gondwanan ornithopod in appearance? what makes Kritosaurus look different from any typical ornithopod that was already present in South America? CuddleKing1993 (talk) 07:13, 29 December 2022 (UTC)[reply]

As a hadrosaurid, it was mostly quadrupedal with a bulging crest on its head. Elasmarians, on the other hand, were bipedal and looked more like Dryosaurus. 2001:4453:5C6:CB00:3089:83FC:122B:B4FC (talk) 08:06, 29 December 2022 (UTC)[reply]