Tylko jest maĹy problem - nikt nie wie (szukam i nic wiarygodnego nie znalazĹem, a Danu nie daĹ Ĺźadnego ĹşrĂłdĹa) ile metrĂłw mierzy brachiozaur (ten berliĹski) a to dla niego siÄ szacuje masÄ we wszystkich badaniach...
Obliczenia na podstawie dĹugoĹci naprawde naleĹźy sobie darowaÄ takĹźe z tego wzglÄdu, Ĺźe mamy wyraĹşnie podane, Ĺźe S. byĹ wiÄkszy od B. o 10-15%, a wiÄc jego masa roĹnie od 1,331 (1,1 do szeĹcianu) do 1,521 (1,15 do szeÄcianu) razy.
Te 30 m dla zauroposejdona nie wiadomo skÄ
d wyszĹo. JeĹźeli jest obliczany na ok 28 m, to moĹźna przyjÄ
Ä w dwie strony - czyli 26-30 m. Nie nalezy tak przyjmowaÄ 30 m i sobie dodaÄ 5 ton, co daje 55 t.
EDIT
WiÄc policzmy ile miaĹby ten najwiÄkszy okaz HM XV2 (koĹc nogi), wiÄkszy o 12-13% (tyle podaje Wedel
tu). WyszĹo mi ok. 24,7 m (24,64 i 24,86). SkÄ
d wiÄc informacja o 25-26 m brachiozaurze? Jego masa jest wiÄksza o 1,405 do 1,443, co daje:
a) dla 29 t (Anderson i in., 1985) - 41-42 t
b) dla 38 t (Gunga i in, 2008) - 53-56 t
c) dla 25 t (Henderson, 2004) - 35-36 t
Wikiepdia podaje, ze miaĹ 25 m
Based on a complete composite skeleton [chodzi chyba o tego z Bernina??], Brachiosaurus attained 25 metres (82 feet) in length and was probably able to raise its head about 13 metres (42 ft) above ground level. Fragmentary material from larger specimens indicates that it could grow 15% [wiÄcej o 2-3 pkt procentowe] longer than this. Such material includes an isolated fibula HMN XV2 1340 mm in length and the brachiosaurid scapulocoracoid referred to Ultrasauros.
Wikipedia nie podaje Ĺźadnych ĹşrĂłdĹe ktĂłre by to potwierdzaĹy, wiÄc ja bym jej nie ufaĹ.
HMN XV2 miaĹby wtedy 28,75 m i masÄ 44, 58, lub 38 t (kolejnoĹÄ jak powyĹźej).
Komu wierzyÄ? Chyba jednak Wedlowi...
EDIT2
SpytaĹem o to na blogu SVPOW i otrzymaĹem takie odpowiedzi:
Matt Wedel pisze:I have seen 74 feet [=22,5m ]mentioned for SII, but I can’t recall where. Funny, I am always worried about how tall things are, it is good to be reminded that they have other dimensions as well.
Mike Taylor pisze:Janensch (1950b) gives the “length along the neural canal” for the HMN SII mount as 22.46 m. It’s not completely clear whether that includes the skull, but the sum of the lengths given for the skull (0.77), neck (8.78), torso (3.92), sacrum (1.07) and tail (7.62) is 22.16 m, which is a good enough match for the whole-length figure that I guess it must indeed include the skull, plus a little slop.
Those booger-heads Naish et al. (2004:793) cite a length of 25 m from Paul (1988) but don’t give a page number. At any rate, Paul (1988:table 1), which gives many measurements of several important sauropod specimens, gives 22.2 m for SII, which is Janensch’s figure rounded to the nearest 0.1 m. I wonder whether Naish et al. used Paul’s 25 m estimate for XV2; if so, that’s sneaky, as they use it as a baseline for estimating the length of “Angloposeidon”, but they’ve been comparing that animal’s cervical with those of SII. Explain yourself, Dr. Naish!
[It's surprising that Paul's SII length estimate corresponds with Janensch's, since most of that paper consists of Paul's criticisms (justified and unjustified) of Janensch's reconstruction, but he argues that his version's shorter torso and longer tail cancel out.]
References:
Janensch, Werner. 1950. Die Skelettrekonstruktion von Brachiosaurus brancai. Palaeontographica (Suppl. 7) 3:97-103.
Naish, Darren, David M. Martill, David Cooper and Kent A. Stevens. 2004. Europe’s largest dinosaur? A giant brachiosaurid cervical vertebra from the Wessex Formation (Early Cretaceous) of southern England. Cretaceous Research 25:787-795.
Paul, Gregory S. 1988. The brachiosaur giants of the Morrison and Tendaguru with a description of a new subgenus, Giraffatitan, and a comparison of the world’s largest dinosaurs. Hunteria 2(3):1-14.