Size comparison scale

[Grey]

Cretoxyrhina could be a good basis but I have several rigorous skeletal models of C. megalodon. They are all based on Gottfried et al.

This chondocranium reproduction.



This model of the Calvert Museum skeleton :





Regarding Zygo, the best I have is this :



And that reconstruction from the Lima exhibit :

[blaze]

What size would be good for it? I haven't really followed what is most agreed upon.

[Grey]

Dec 6, 2013 0:17:39 GMT 5 blaze said:

What size would be good for it? I haven't really followed what is most agreed upon.

To be fair, I would simply follow the actual published sizes for both.

13.5-14 m for Livyatan using a skeleton/body shape of Physeter, 16.2-17.5 m using a skeleton/body model of Zygophyseter.

For meg, there is of course the conservative maximum by Gottfried 15.9 m TL and the maximum of 17 m. Using Shimada's method, Pimiento found teeth from two 17 m individuals and one at 17.9 m. Gottfried hypothesized a maximum size of 20.3 m TL.

There are others rigorous estimates, based on jaws perimeter, but they are not properly published.

[blaze]

I'm almost done with Livyatan (both Physeter and Zygophyseter based) but I realized, are whales measured in some special way? in the Zygophyseter drawing from the description paper it's 6.5m from tip of snout to tip of the tail fluke, I have it scaled like that but the Physeter based body was scaled measuring up to the middle of the tail fluke, about a meter shorter because I had in mind that that's where it's measured at but then I remember that that was for elephant seals not whales.

Edit: I've found it, whales are measured tip of rostrum to notch of tail fluke, since I don't know what measurement the authors of Zygophyseter meant and their drawing shows an animal 6.5m in total length when scaled to the correct skull size I'll use the measurements as total length.

Edit2: Livyatan size

[Grey]

Blaze, that is spectacular, a top quality work. Of course the dorsal fin is speculative but no doubt whatever its precise size, this creature was certainly epic, and terrifying to observe attacking.

[blaze]

Thank you haha, indeed.

The dorsal fin... I just left it there from the reconstruction of Zygophyseter lol

[Grey]

For Carcharocles, there is also a body shape and some stuff here :

swfscftp.noaa.gov/users/hdewer/Petitions/ca%20petition/Attachment%204.pdf

Sizes table by Gottfried :



And by Pimiento using Shimada's method :




Of course, most represents juveniles and neonates.

[blaze]

Carcharocles megalodon and Livyatan compared

[Grey]

Excellent, epic work as I expected. Congratulations. I think that's the best comparisons of the whole animals I've seen yet.

[blaze]

Really? I'm flattered

Here it is the Megalodon only size chart that you requested.

[Life]

Excellent work, blaze. You have artistic talent.

[blaze]

I prefer to think I give myself a lot of free time, I really can't draw live animals to save my life. lol

[Grey]

Not all Mamenchisaurus are the same.

[Grey]

[gigadino96]

Here's a T.rex-Spinosaurus comparison according to Cau (made by Cau)


Though I'm not completely agree with him.