More goodness from Osborn and Mook’s (1921) gargantuan Camarasaurus monograph, again prepared largely for comparison with “Apatosaurus” minimus. Last time, I showed you one of O&M’s pubis illustrations. Now an ischium:

This shows the left ischium AMNH 576o’/Is.4. Left column: proximal aspect. Middle column, from top to bottom: medial, lateral, posterior (no dorsal view was provided). Right column: distal. Heavily modified from Osborn and Mook (1921: fig. 101) — cleaned up, lettering and lines removed, recomposed in a more informative layout, views rescaled to better match each other, and tweaked for colour.

As usual, click through for full resolution (only 989 x 978 this time).

It’s interesting to compare this with the similarly composed illustration of the “Apatosaurus” minimus ischium from last week.

References

• Osborn, Henry Fairfield, and Charles C. Mook. 1921. Camarasaurus, Amphicoelias and other sauropods of Cope. Memoirs of the American Museum of Natural History, n.s. 3:247-387, and plates LX-LXXXV.