Gorm Skouboe Raun

ｱｼﾞｱﾃｨﾗﾇｽｪ……w 福井の特別展『獣脚類2025』でこの論文の著者と、標本の前でこの話めっちゃしてたんだよねｗ 論文出版おめでとうです！ x.com/S_Kochirui/sta…

@BadlandsColt We’re did it

I warned you guys. @GormRaun sciencedirect.com/science/articl…

Guy at the conference I’m attending: “you work on tyrannosaurs? What do you think of Asiatyrannus and Raptorex getting nano’d into Tarbosaurus?” Me:

The final version of the paper is out! doi.org/10.1016/j.cret… Have a good read!

@MiloGaillard3 @TheAnimalCrewz Thanks, and don’t worry, expect more Tarbo stuff in the future

@GormRaun @TheAnimalCrewz Thank you. I don’t mean to be too harsh on your paper, btw. You clearly put a lot of effort into it.

Oh yeah, remember when people treated Asiatyrannus as “Nanotyrannus but real” when it was first described? Well, look who’s laughing now.

@MiloGaillard3 @TheAnimalCrewz That’s not to say it isn’t good to be vigilant of illustrations, after all, there is a human aspect to them

@MiloGaillard3 @TheAnimalCrewz Furthermore, Illustrations are and have been the primary way for researchers to figure their papers, even after photographic print. Which is why you don’t typically see major criticisms of papers such as Currie (2003).

Reclassification of Asiatyrannus & Raptorex as Tarbosaurus #paleoart #paleontology #dinosaurart

@Monster77571319 @beazelgoose @SomniosusW @knight_Steve_ Typically, the Nemegt is considered Maastrichtian in age, but like, broadly speaking. Many formations unfortunately lack the volcanic (or other beds) that can absolutely date the rocks of the cretaceous.

@beazelgoose @SomniosusW @knight_Steve_ @GormRaun Negment formation still exists (although parts of it may be Campanian)

Campanian segment from Prehistoric Planet Season 1. Qianzhousaurus sinensis hunts Huanansaurus ganzhouensis(=Corythoraptor jacobsi)

@TM9380 Yea I think most people for some reason have this idea that Tarbosaurus is only in the 10 meter range, when they most definitely were average rex sized.

@GormRaun Been trying to remind folks for years they’ve underestimated how big Tarbosaurus is

Fun little size est. about Tarbosaurus, the largest femur known has a circumference of 480 mm (MPC-D 107/2), giving a weight estimate following Campione et al. (2014) of 5.02 tonnes. Scaling PIN 551-1 from that gives a circumference range of 552 to 568 mm... 7.39 to 8.01 tonnes.

Similarly sized Tyrannosaurus skulls have femurs ranging from 520 to 580 mm in circumference, fyi. Giving a weight range of 6.25 to 8.46 tonnes.

@TomHoltzPaleo @NatSciChannel Agreed

@NatSciChannel MOST large dinosaurs probably had comparably large ranges. What differs for Eastern/Central Asia is that at this time slice we have multiple depositional basins, not just one local one.

🚨NEW STUDY DROP🚨 A new attempt at sinking Raptorex - new study finds that Asiatyrannus and Raptorex don't really have enough diagnostic non-ontogenetically related traits to be considered unique genera, and share too many traits with Tarbosaurus. 🎨: below

@knight_Steve_ @omegafreelancer @Lythtras The Alioramines are pretty distinct from Tarbo imo

@omegafreelancer @Lythtras Nano became valid and how all the Asian tyrannosaurs are gonna get absorbed into Tarbo?

Holy shit-

@tylerstoneart @raptor_chatter @TM9380 I think it’s easy to see Raptorex as more basal when the original reconstruction depicted it as such, the individual bones however, just won’t be uniquely different from Tarbo

@tylerstoneart @raptor_chatter @TM9380 My own insight: I had the opportunity to assess over 25 Tarbo skulls and I’ve yet to see a Rapto character that isn’t also in at least some Tarbos, it’s a really variable taxon, which I got into at SVP in Birmingham 1/2

@TM9380 @tylerstoneart Agreed. We actually have enough juvie Tarbos to do direct comparison, so I expect a lot of debate.

@omegafreelancer @ChaseBrownstein It comes up in my upcoming work that deal more with ontogeny than this chapter, if that’s any consolation

@GormRaun @ChaseBrownstein Like its not weird because Nano T isn't directly involved, its weird because "why aren't the authors citing the two studies that raised some of the biggest ramifications in diagnosing tyrannosaurs this decade"

This is cool - odd that Napoli and Zanno (2025) or Griffin et al. (2025) are not cited, however.

@Deform2022 I have yet to see a specimen of any Spinosaurus complete enough that they are suitable for such a comparison, hopefully we will in the future

@GormRaun The two actually do overlap in several areas, such as the neural spines, dorsals, caudals, and dentary. The real issue is that no official comparison between the overlapping elements was ever made.

On a different note, this is a pretty good argument for why the Egyptian and Moroccan variants of Spinosaurus are the same taxon.