Comment on Paleo-King's profile

Paleo-King's avatar
Nice, so the Chubut monster has a name! Or is this a different titanosaur? It says it's from Neuquen rather than Chubut, and I don't see the femur or shoulder material from Chubut....
Carcharodontotitan's avatar
Are there two giant titanosaurs from Chubut?
Because Wikipedia has an article about one that was discovered there in 2014, but I'm not sure if that's the "Chubut Monster" that it's talking about or not.
When was the "Chubut Monster" discovered?
Paleo-King's avatar
Yes that is the Chubut monster. I blogged it soon after the discovery: paleoking.blogspot.com/2014/05…

I am pretty convinced that this is a different animal from Notocolossus, they are from different formations and probably different times, although they are very closely related.
Carcharodontotitan's avatar
They're both transitional Lognkosaurs then?
Paleo-King's avatar
I would say so. Overall both look pretty similar to Futalognkosaurus, Traukutitan, or Drusilasaura. It would be harder to prove that they belong in some other group.
Carcharodontotitan's avatar
Cool. Can't wait for some more future titanosaur skeletals then.
Megalotitan's avatar
What is the formation where the Chubut monster was found?
Megalotitan's avatar
It seems like a different titanosaur.
Paleo-King's avatar
I am starting to agree with you. This animal looks a bit different and the bones are more fragmentary/fractured. But they're both unmistakable Lognkosaurians. So this makes the tally of that family...

Futalognkosaurus
Mendozasaurus
Malawisaurus (basal stem-lognkosaur anyway)
Traukutitan
Drusilasaura
Puertasaurus
Ruyangosaurus (????)
Pitekunsaurus (????)
Dreadnoughtus (? may be either Argyrosaur or lognkosaur?)
the Chubut monster
and now Notocolossus.

And to think not that long ago only the first three were known as lognkosaurs.
Megalotitan's avatar
What was likely it's sister taxon (or at least, the closest relative)?
Paleo-King's avatar
If you're talking about Notocolossus, the closest relative is probably Dreadnoughtus (unless it's an argyrosaur) or Drusilasaura. The paper says Dreadnoughtus came out as the closes taxon, but it didn't input Drusilasaura or most of the other lognkosaurs so as of now it's still debatable. But it does show a lot of similarities with Dreadnoughtus. I have more of an issue with how they had Tapuiasaurus coming out as the next closest taxon, even though it's a nemegtosaur... and it's only known from a handful of remains, the best preserved being the skull. Most of the other elements are pretty eroded and in my view not referrable to lognkosauria.

If you're talking about the Chubut Monster, I would guess the closest relative is either Futalognkosaurus or Traukutitan.