Multiview of a cervical vertebra of the Apatosaurus ajax holotype YPM 1860

September 3, 2013

I was recently bemoaning the lack of published diplodocid cervical illustrations in dorsal view. Subsequently I mentioned that Upchurch et al. (2005) had illustrated five cervicals of an Apatosaurus specimen.

I was overlooking one other paper that contains such an illustration. Which is a bit embarrassing, as it’s one of ours. In fact, it’s our most recent paper, Wedel and Taylor (2013) on sauropod neural spine bifurcation. The very first figure in that paper (the first of 25!) is relevant to my interests. So here it is:

Figure 1. A cervical vertebra of Apatosaurus ajax YPM 1860 showing complete bifurcation of the neural spine into paired metapophyses. In dorsal (top), anterior (left), left lateral (middle), and posterior (right) views.

Figure 1. A cervical vertebra of Apatosaurus ajax YPM 1860 showing complete bifurcation of the neural spine into paired metapophyses. In dorsal (top), anterior (left), left lateral (middle), and posterior (right) views.

Click through for glorious high-resolution goodness!

References

Upchurch, Paul, Yukimitsu Tomida, and Paul M. Barrett. 2005. A new specimen of Apatosaurus ajax (Sauropoda: Diplodocidae) from the Morrison Formation (Upper Jurassic) of Wyoming, USA. National Science Museum Monographs No. 26. Tokyo. ISSN 1342-9574.

Wedel, M.J., and Taylor, M.P. 2013. Neural spine bifurcation in sauropod dinosaurs of the Morrison Formation: ontogenetic and phylogenetic implications. Palarch’s Journal of Vertebrate Palaeontology 10(1): 1-34. ISSN 1567-2158.

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One Response to “Multiview of a cervical vertebra of the Apatosaurus ajax holotype YPM 1860”


  1. […] on the front of their cervical ribs. (It’s hard to tell with Apatosaurus ajax, because the best cervical vertebra of that species is so very reconstructed.) How did these appear in life? It’s difficult to be sure. They […]


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