Giant theropods overview thread

[creature386]

As for your last line, you don't need to repeat what broly said…

[blaze]

I think I just will agree to disagree regarding the two pieces of snout, just one comment, the lower toothrow being 70% the length, that's the point, it doesn't fit in more than one dimension at a time.



In Arizonasaurus the centrum is also of similar in shape, I've searched for anterior/posterior photos but I haven't found any, it might be or it might be not that that reconstruction is good

@broly
I agree on that, if it was a wide ridge, a little more wide than the transverse processes is probably the max.

[Fragillimus335]

Arizonasaurus's vertebra look dashingly similar to those of Spinosaurus…  

[theropod]

Indeed. The spine seems similar in width, and even the proportions of the neural arch and centrum are comparable.

Where’s that image from?

[blaze]

I want to know too.

[creature386]

I could not find anything with google, is that maybe your own comparison?

[theropod]

Even if it was, someone must have made and published those photographs of Arizonasaurus.

Edit: I guess it’s from "Osteology of the Middle Triassic pseudosuchian archosaur Arizonasaurus babbitti" (Nesbitt 2005). Unfortunately I cannot find an accessible version anywhere.

[blaze]

I can confirm it's figure 19 of that paper, theropod.

Also I want to share this, it's from 2012 and it's very brief but

Ontogenetical changes in the quadrate of basal tetanurans.
Christophe Hendrickx and Octávio Mateus

CICEGe, Faculdade de Ciências e Tecnologia, FCT,
Universidade Nova de Lisboa, 2829-516 Caparica, Portugal.
Museu da Lourinhã,
Rua João Luis de Moura, 95, 2530-158 Lourinhã, Portugal.
[e-mail]; [e-mail]


Although nonavian theropod have received considerable interest in the last years, their ontogeny still remains poorly understood, especially the ontogenetical changes affecting their skull (Rauhutand Fechner, 2005). The quadrate, for instance, is preserved in several embryos and juvenile specimens belonging to many clades of theropods such as the Tyrannosauridae (Carr, 1999), Compsognathidae (Dal Sasso and Maganuco, 2011), Therizinosauroidea (Kúndrat et al., 2007), Oviraptoridae (Norell et al., 1994; Norell et al., 2001; Weishampel et al., 2008) and Troodontidae (Varrichio et al., 2002) but very little is usually said about the anatomy of this bone and no one has ever investigated ontogenetical variation in the nonaviantheropod quadrate. The discovery of two quadrates belonging to embryos of the sinraptorid Lourinhanosaurus antunesi from Portugal and five isolated quadrates pertaining to juvenile, subadult and adult specimens of Spinosauridae from Morocco fills this gap and allows some ontogenetic information to be drawn for this bone in these two specic clades of Theropoda.

link

and another New giant theropod ichnotaxon

[blaze]

I found something interesting in the references of a recent paper.

Dalman, S.G. and S.G. Lucas. A new large Tyrannosaurid Alamotyrannus brinkmani, n. gen., n. sp. (Theropoda: Tyrannosauridae), from the Upper Cretaceous Ojo Alamo Formation (Naashoibito Member), San Juan Basin, New Mexico. New Mexico Museum of Natural History and Science Bulletin. In press.

Google search turns up with only two results for "Alamotyrannus" so this paper is still unpublished and when it gets published it's probably going to get a lot of press over being a new large Tyrannosaurid that "lived alongside T. rex" HA! this new taxon is probably the supposed Tyrannosaurus species that lived with Alamosaurus, might be ancestral to Tyrannosaurus though.

[Infinity Blade]

By large, do they mean up there with T.rex and the others in size?

[Fragillimus335]

Feb 12, 2014 14:36:21 GMT 5 theropod said:

Even if it was, someone must have made and published those photographs of Arizonasaurus.

Edit: I guess it’s from "Osteology of the Middle Triassic pseudosuchian archosaur Arizonasaurus babbitti" (Nesbitt 2005). Unfortunately I cannot find an accessible version anywhere.

Yes it is, sorry about not responding earlier!

[Fragillimus335]

Mar 6, 2014 7:14:09 GMT 5 blaze said:

I found something interesting in the references of a recent paper.

Dalman, S.G. and S.G. Lucas. A new large Tyrannosaurid Alamotyrannus brinkmani, n. gen., n. sp. (Theropoda: Tyrannosauridae), from the Upper Cretaceous Ojo Alamo Formation (Naashoibito Member), San Juan Basin, New Mexico. New Mexico Museum of Natural History and Science Bulletin. In press.

Google search turns up with only two results for "Alamotyrannus" so this paper is still unpublished and when it gets published it's probably going to get a lot of press over being a new large Tyrannosaurid that "lived alongside T. rex" HA! this new taxon is probably the supposed Tyrannosaurus species that lived with Alamosaurus, might be ancestral to Tyrannosaurus though.

Awesome. That is all.

[Fragillimus335]

Feb 14, 2014 15:41:56 GMT 5 blaze said:

I can confirm it's figure 19 of that paper, theropod.

Also I want to share this, it's from 2012 and it's very brief but

Ontogenetical changes in the quadrate of basal tetanurans.
Christophe Hendrickx and Octávio Mateus

CICEGe, Faculdade de Ciências e Tecnologia, FCT,
Universidade Nova de Lisboa, 2829-516 Caparica, Portugal.
Museu da Lourinhã,
Rua João Luis de Moura, 95, 2530-158 Lourinhã, Portugal.
[e-mail]; [e-mail]


Although nonavian theropod have received considerable interest in the last years, their ontogeny still remains poorly understood, especially the ontogenetical changes affecting their skull (Rauhutand Fechner, 2005). The quadrate, for instance, is preserved in several embryos and juvenile specimens belonging to many clades of theropods such as the Tyrannosauridae (Carr, 1999), Compsognathidae (Dal Sasso and Maganuco, 2011), Therizinosauroidea (Kúndrat et al., 2007), Oviraptoridae (Norell et al., 1994; Norell et al., 2001; Weishampel et al., 2008) and Troodontidae (Varrichio et al., 2002) but very little is usually said about the anatomy of this bone and no one has ever investigated ontogenetical variation in the nonaviantheropod quadrate. The discovery of two quadrates belonging to embryos of the sinraptorid Lourinhanosaurus antunesi from Portugal and five isolated quadrates pertaining to juvenile, subadult and adult specimens of Spinosauridae from Morocco fills this gap and allows some ontogenetic information to be drawn for this bone in these two specic clades of Theropoda.

link

and another New giant theropod ichnotaxon


Curse them! Not including the adult Spinosaur dentary picture!!!!

[Deleted]

The Portugese Torvosaurus(Torvosaurus sp.)is now T. gurneyi. Estimated at ~10 meters long and ~4-5 tonnes in mass.

www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0088905

[blaze]

Infinity Blade
I don't know, maybe, the paper that had that reference is Dalman (2013) "New Examples of Tyrannosaurus rex from the Lance Formation of Wyoming, United States" and this is what it says that is cited with the Alamotyrannus paper:

Although fragmentary, the many isolated but diagnostic tyrannosaurid skeletal fossil elements from the Naashoibito Member of the Ojo Alamo Formation (early Maastrichtian) of northwestern New Mexico (Sullivan et al. 2005; Jasinski et al. 2011; Dalman and Lucas, in press) provide evidence for the occurrence of a new taxon of a large tyrannosaurid.

Given our current knowledge, Tyrannosaurus rex is the only large-bodied tyrannosaurid theropod known that during the Late Maastrichtian roamed the coastal plains of the Western Interior Seaway of northwestern North America. However, this assumption may change with new discoveries from New Mexico (Dalman and Lucas, in press).

I guess will have to wait for the paper to be published.

Fragillimus335
I thought the same haha.

@brolyeuphyfusion
They estimated the weight using Therrien and Henderson (2007) equation but yes, a 115cm long skull corresponds to a length approaching 10m based on Hartman's skeletal but is probably closer to 9.5m as his skeletal scaled to have a skull 120cm long is 9.8m long.

Edit:
Might not be giant enough but it could be a giant for its group.

Giant oviraptor tracks from hell creek