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Post by Infinity Blade on Nov 15, 2014 19:42:12 GMT 5
I've been very uncertain about this for a while now. How accurate is the ~80-100kg figure on the Wikipedia page for Baurusuchus? On Carnivora, one could get the impression it's roughly as massive as a lion or any other animal in that weight range, but I'm questioning this as well. How massive, then, was it?
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Post by creature386 on Nov 15, 2014 21:46:54 GMT 5
They even cited their (bad) source incorrectly. It only says 80 kg. I regret that I am not blaze, but I will try my best:
Given that it appears less bulky than modern crocodiles and that I think it was a bit over 3 m (using the 43 cm length for B. salgadoensis and the reconstruction on Wikipedia), 100 kg are not that unlikely, even though I believe it could have weighed a bit more.
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blaze
Paleo-artist 
Posts: 766
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Post by blaze on Nov 16, 2014 0:08:00 GMT 5
I don't think you are far from the truth. Carvalho et al. (2005) gives the DCL of B. salgadoensis at 40cm, using equations for alligators (Woodward et al., 1995; Farlow et al., 2005; Young et al., 2011) we can estimate a total length of 2.9m-3m.
For B. albertoi, measuring the figures in Nascimiento and Zaher (2010) we can get a humerus length of ~200mm and a femur length of ~270mm with least midshaft AP and ML widths of 19.5mm/18.1mm and 24.7mm/20.7mm respectively, from this we can estimate circumferences of 59.1mm and 71.3mm respectively. Using Campione and Evans (2012) equation we can estimate a weight of 54kg.
Following the figures in Nascimiento and Zaher (2010,2011) it appears the skull of B. salgadoensis is ~33%larger than that of B. albertoi, assuming isometric scaling B. salgadoensis would be ~130kg.
I have no idea if B. pachecoi is larger or smaller than B. salgadoensis, the figures in Nascimiento and Zaher (2010,2011) are contradictory.
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Post by creature386 on Nov 16, 2014 2:44:28 GMT 5
Following the figures in Nascimiento and Zaher (2010,2011) it appears the skull of B. salgadoensis is ~33%larger than that of B. albertoi, assuming isometric scaling B. albertoi would be ~130kg. Just asking in case I got something wrong, did you mean to write B. salgadoensis? Anyway, 130 kg was in the range of numbers I calculated. I believed in 3 to 3.2 m and 100 to 130 kg. Looks like the lower of the former range and the higher of the latter were the correct ones (I underestimated its bulk a bit).  |
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blaze
Paleo-artist
Posts: 766
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Post by blaze on Nov 16, 2014 3:31:36 GMT 5
Yes! haha
There's still greater uncertainty about the weight though, after all I based the measurements in the scalebars, none of the two Nascimiento and Zaher papers bother to give us measurements. :sadface: but it indeed appears to have similar length/weight relationship to other crocodilians, ~3m and ~100kg.
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Post by Infinity Blade on Nov 16, 2014 5:34:01 GMT 5
Many thanks once again for clearing my uncertainties!
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Post by Infinity Blade on Aug 11, 2016 8:18:47 GMT 5
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Cross
Junior Member
The biggest geek this side of the galaxy. Avatar is Dakotaraptor steini from Saurian.
Posts: 266 
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Post by Cross on Aug 11, 2016 8:36:23 GMT 5
The article only has to do with osteohistology and dwarfism, so I have zero clue as to where they got that 4 meters figure for the Baurusuchus in this comparison. Does anyone know who the Scott Hartman of crocodyliforms is? |
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