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Volkheimeria chubutensis skeletal by Paleo-King Volkheimeria chubutensis skeletal by Paleo-King
Volkheimeria chubutensis

Etymology: "Of Volkheimer, from Chubut province"

Time horizon: Middle Jurassic, Callovian epoch (~164 mya)

Length: 11m (~36 ft.), perhaps more depending on maturity.

Probable mass: 4 tons, perhaps more depending on maturity.

A quick and dirty skeletal recon of Volkheimeria, an Argentinian dinosaur poorly understood, barely studied, and often labeled as the first brachiosaur or the missing link to brachiosaurs. Actually it lived far too recently to be the first one (it lived in the Callovian epoch, whereas the more derived Lapparentosaurus from Madagascar is found entirely in the previous epoch, the Bathonian).

It is however probably the most primitive sauropod that can be referred to brachiosauridae, or at least a greater "brachiosauroidea" (there are several other primitive macronarians and brachiosaur-mimic neosauropods falsely labeled "cetiosaurs" or "dubious eusauropods" at some point in time, which are not quite brachiosaurs but don't comfortably fit in other recognized clades either). While Volkheimeria can't be called the "granddaddy" of brachiosaurs, it is probably a very primitive and more or less direct descendant of that animal. It appears to have been considerably more basal than either Lapparentosaurus or Atlasaurus [paleo-king.deviantart.com/art/… ].

The current skeletal is the first and only one of Volkheimeria, and is scaled based on related animals and on the few photos, line drawings, and limb measurements available in various references in papers. Getting a hold of the original description has proven notoriously difficult. The best we can know for sure is that "little Volk" was probably rather small for a sauropod (elephant-sized) and had stockier limbs than most brachiosaurs. That said, it's only known from one (very incomplete) specimen, there's no shoulder material to gauge its maturity, and the tail material is missing entirely. So there's bound to be a lot of guesswork in the proportions, and it's understandable why certain paleoartists (you know who you are :XD:) refuse to reconstruct it.

References:

J. F. Bonaparte (1979). Dinosaurs: a Jurassic assemblage from Patagonia. Science 205:1377-1378

Leonardo Salgado; Rodolfo A. Coria (2005). "Sauropods of Patagonia: systematic update and notes on global sauropod evolution". In Virginia Tidwell, Kenneth Carpenter. Thunder-Lizards: The Sauropodomorph Dinosaurs. Indiana University Press. p. 495.
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:iconpaleo-reptiles:
Paleo-reptiles Featured By Owner Oct 1, 2013
my dear friend, Nima!

A) Scott told me numbers of Armour bones of Scelidosaurus was not complete in art of G.S. Paul, although he drew it several times...but Scott believed this problem in his art...I am agree with him because I had a problem about this issue in past, while I try drew a model....What is your opinion?????

scotthartman.deviantart.com/ar…
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B) Vlad Konstantinov compare T.rex.....my friend, Scott Hartmantell me G. S. Paul  estimate tail of T.rex very short....Is it fact??????

swordlord3d.deviantart.com/art…

swordlord3d.deviantart.com/art…
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:iconpaleo-reptiles:
Paleo-reptiles Featured By Owner Oct 1, 2013
Nice!
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:iconteratophoneus:
Teratophoneus Featured By Owner Sep 26, 2013
a very little known species,  great to see more pics of it :D
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:iconbrolyeuphyfusion9500:
I like that you do these technical illustrations of the more obscure sauropodomorphs that everyone seems to overlook.
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