Talk:Allen Formation

Edit Warring
It seems there is an edit war brewing on this page. I'd like to request the issue be talked out here on the talk page, instead of endless reverting. Cheers, --TimTheDragonRider (talk) 11:08, 13 February 2022 (UTC)

Nodosaurs in South America are impossible.
https://www.nature.com/articles/s41586-021-04147-1

The only type of ankylosaurs known from Gondwana, which South America was a part of, were the parankylosaurs, nodosaurs were endemic to Europe, Asia and North America, and could not be able to venture into South America because it was completely separate from North America during the Late Cretaceous. 162.40.241.62 (talk) 00:50, 14 February 2022 (UTC)
 * Unless a publication specifically assigns the Allen Formation anyklosaurian to parankylosaurs rather than nodosaurids, this is original research and not valid information to put here. You need to directly back this claim up rather than handwaving it by saying that nodosaurs couldn't have existed in Gondwana because the three taxa described just happen to be in a different clade.Armin Reindl (talk) 15:24, 14 February 2022 (UTC)

How could a North American Clade of Ankylosaur even make it across the vast, mosasaur infested sea that separated South America from North America? — Preceding unsigned comment added by 162.40.241.62 (talk) 01:17, 15 February 2022 (UTC)


 * The same way that hadrosaurids arrived to South America. Kritosaurini is a clade that almost entirely comprises of North American taxa and yet some taxa pertaining to the clade are known from South America such as Secernosaurus koerneri and the unnamed Argentinean hadrosaurid from Salitral Moreno (Prieto-Marquez & Salinas, 2010). The clade dispersed from southern North America to South America during the late Campanian, around the same time and place the South American nodosaurid shows up in the Allen Formation. So as to say that South American nodosaurids are completely impossible is inaccurate.

How could hadrosaurids and nodosaurs from North America make it into South America when the two continents were completely separated during the late Cretaceous? 193.119.42.246 (talk) 05:36, 15 February 2022 (UTC) As for the Patagonian hadrosaurs, we know very little about them and I would be bet that they too could very well be a very distinct group from the northern saurolophines and lambeosaurs, much like how Antarctopelta was lumped within the nodosaurids prior to the description of Stegouros. — Preceding unsigned comment added by 162.40.241.62 (talk) 12:31, 15 February 2022 (UTC)


 * As Armin said before, unless a publication specifically assigns the Allen Formation anyklosaur to parankylosauria rather than nodosauridae, it should remain as a nodosaurid. Ankylosaur Enthusiast (talk) 12:54, 15 February 2022 (UTC)


 * Can you please actually link a paper instead of just simply waving your hand around making baseless claims? We aren't saying you're wrong (however the majority evidence currently points to it), we're asking you to verify your claims as part of Wikipedia's policy of citating your claims, which you haven't done so far. So unless you can give valid citations for what currently are baseless claims, please refrain from creating edit wars, lest someone gets so fed up that they file an ip ban. Sauriazoicillus (talk) 13:04, 15 February 2022 (UTC)


 * Okay after thinking through this further, there's just going to be a continuation of this edit war before someone else steps in, FunkMonk could you please help us? I have no what else can be done in this situaion. Sauriazoicillus (talk) 8:29, 16 February 2022 (UTC)
 * I think the case is pretty clear, we can't say anything not explicitly stated in published papers, however correct it may be, as that would be WP:original research. FunkMonk (talk) 09:54, 16 February 2022 (UTC)

South American Ceratopsids?
Since there are saurolophine hadrosaurs and nodosaurs known from this geological formation, that would make it very likely that new types of Chasmosaurinae Ceratopsidae from South America are just waiting to be discovered. 98.17.3.65 (talk) 12:21, 28 March 2022 (UTC)