Paper/Material share & request thread

[Deleted]

There was no downsize. Ibrahim et al. actually state it to be at least 15 meters long in the paper linked above.

If you're referring to the ~6-7 tonne estimate, that wasn't published in a paper and is based on a shrinkwrapped model, complete with tucked-in GSP gastralia. After all, if someone asks you how big is a crocodile, would you use this specimen as your representative?

[blaze]

^De-shrink wrapping it isn't going to make it several tonnes heavier, specially when the model has a weirdly deep chest compared to the pubis and the tucked-in gastralia serves more to connect this deep chest and the shallower hips (the tucked-in part never goes higher than the pubis, contrary to GSP skeletals). Correcting this will make it look even longer but I have hypothesized that the anterior dorsals of the neotype are actually posterior ones and the guy that runs the get away trike blog arrived to the same conclusion independently, this will reduce the length of the torso by a good margin.

As for the 2014 paper, here it is: link and the supplementary info link (I can't believe that even the supplementary info is behind the paywall).

[Supercommunist]

Thanks!


So, Blaze, I realize it is pretty much impossible to accurately determine spinosaurus' size due to a lack of material, but how heavy do you believe it was? No need to give me an in-depth answer, I probably won't understand it anyway, lol.

Also speaking of dinosaur sizes, somebody on deviantart constructed a 50 foot long carcharodontosaurus using some of your material.

paleojoe.deviantart.com/art/Carcharodontosaurus-582173700

Your thoughts?

[Infinity Blade]

Okay, no one may be able to find a reliable maximum swimming speed figure for crocodilians, but can we say the same for penguins? Or perhaps sea turtles?

[creature386]

I've found this for emperor penguins:

The final acceleration with three strokes enabled the penguin to reach a speed of 2.8 m s^-1 in less than 2 s.

jeb.biologists.org/content/208/13/2549.long
(Gravid leatherback) Sea turtle:

Modal speeds ranged from 0.56 to 0.84 m s^-1, maximum speed range 1.9-2.8 m s^-1.

jeb.biologists.org/content/205/23/3689

[blaze]

Supercommunist
I think about 7 tonnes for the largest specimen.

About the Carcharodontosaurus reconstruction, the main mistake seems to be scaling my 155cm long skull reconstruction to be 180cm, there's no reason for that.

@ausar
I found something for crocodiles but it's using juveniles and about maximum sustained speed not maximum speed overall, a 1m saltie moves at 0.5m/s or about 2km/h. www.biology.ualberta.ca/courses.hp/biol506.hp/pdfs/Elsworth03-CrocSwimming.pdf

[Infinity Blade]

Apr 1, 2016 14:09:00 GMT 5 creature386 said:

I've found this for emperor penguins:

The final acceleration with three strokes enabled the penguin to reach a speed of 2.8 m s^-1 in less than 2 s.

jeb.biologists.org/content/208/13/2549.long
(Gravid leatherback) Sea turtle:

Modal speeds ranged from 0.56 to 0.84 m s^-1, maximum speed range 1.9-2.8 m s^-1.

jeb.biologists.org/content/205/23/3689

Okay, cool. I'm curious about the gentoo penguin as well, as it in particular was claimed to have a top swimming speed of 22mph.

[Ceratodromeus]

Mar 30, 2016 12:31:57 GMT 5 blaze said:

@ceratodromeus
I've been searching for that book for so long but to no avail, seems like the only option is buying one in Amazon.

@ausar
I don't have any about crocodilian swimming speed but check your messages again for The Tyrant King book.

I've bought a copy off of amazon today, it should be here in the next five days. if you'd like i'll try and scan or take pictures of some of the pages if you want to see some of it

[Supercommunist]

Anybody have a description on the size of the ceratospian from the dueling dinosaurs?

[creature386]

The fighting Protoceratops was a relatively small individual with a body length of approximately 1.3 m, falling well short of the typical adult length of approximately 2 m (estimated from You and Dodson, 2004; their figure 22.2C). The individual may have been a juvenile, a possibility consistent with the hypothesis that theropods preyed primarily upon juveniles (Hone and Rauhut, 2010).

New evidence for a trophic relationship between the dinosaurs Velociraptor and Protoceratops (Hone et al.; 2010)
It's mass got hardly discussed, but they cited previous authors:

Colbert suggested a mass of 177 kg, probably based on an adult specimen with a body length of approximately 2m (Dodson, 1996), while Seebacher calculated 23.7 kg based on an assumed length of 1.4 m. Given the discrepancy between these figures, a careful reanalysis of the probable mass of Protoceratops would be valuable.

Seebacher's estimate is probably the more reasonable one, 177 kg is horribly outdated and arguably physically impossible. I think ~20 kg is a safe guess.

[Infinity Blade]

^Dueling Dinosaurs, not Fighting Dinosaurs.

[creature386]

Thanks for the correction. I think I saw a PDF on the dueling dinosaurs as well, but I haven't downloaded it, the website is offline and it is depressingly hard to find anything about the Nanotyrannus vs ceratopsian case, so I'm out here.

[Infinity Blade]

Does anyone have a reliable top speed figure for ostriches?

Edit: I found a speed of ~61 km/h from the speed/kicking paper on Mesembriornis.

[Infinity Blade]

Okay, anyone have a reliable top speed figure for shrews?

[Infinity Blade]

Can someone get full access to the following?

www.karger.com/Article/Abstract/94068