{.size-large .wp-image-17712 .aligncenter loading=“lazy” attachment-id=“17712” permalink=“http://svpow.com/2020/07/14/the-dilophosaurus-redescription-by-marsh-and-rowe-is-now-freely-available/dilophosaurus-skull-marsh-and-rowe-2020-fig-36/” orig-file=“https://svpow.files.wordpress.com/2020/07/dilophosaurus-skull-marsh-and-rowe-2020-fig-36.jpg” orig-size=“1200,1500” comments-opened=“1” image-meta=“{"aperture":"0","credit":"Mathew

Ray Wilhite posted this gorgeous image on a Facebook thread, and we’re re-posting it here with his permission.

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In a comment on the last post, Mike wrote, “perhaps the pneumaticity was intially a size-related feature that merely failed to get unevolved when rebbachisaurs became smaller”. {.wp-image-6447 .size-large aria-describedby=“caption-attachment-6447” loading=“lazy” attachment-id=“6447” permalink=“http://svpow.com/2012/06/28/hot-sauropod-news-part-1-rampant-pneumaticity-in-saltasaurines/caudal-pneumaticity-in-saltasaurines-cerda-et-al-2012-fig-1/”

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If you’ve been here for very long you know I have a bit of a neural canal fixation.

{.size-large .wp-image-14823 .aligncenter loading=“lazy” attachment-id=“14823” permalink=“http://svpow.com/2018/03/20/cervical-vertebrae-of-suuwassea-on-display-at-the-academy-of-natural-sciences-in-philadelphia/suuwassea-cervicals-at-the-academy-of-natural-sciences/” orig-file=“https://svpow.files.wordpress.com/2018/03/suuwassea-cervicals-at-the-academy-of-natural-sciences.jpg” orig-size=“2400,1200” comments-opened=“1”

{.size-large .wp-image-14770 .aligncenter loading=“lazy” attachment-id=“14770” permalink=“http://svpow.com/2018/03/02/the-pneumatic-tail-of-the-field-museum-apatosaurine-fmnh-p25112/dscn7510/” orig-file=“https://svpow.files.wordpress.com/2018/02/dscn7510.jpg” orig-size=“2272,1704” comments-opened=“1”

{.size-large .wp-image-14213 .aligncenter loading=“lazy” attachment-id=“14213” permalink=“http://svpow.com/2017/06/06/hot-new-stuff-in-app-rebbachisaur-pneumaticity-big-croc-allosaurus-butts/pneumatic-transverse-process-in-katepensaurus-ibiricu-et-al-2017-figure-4/” orig-file=“https://svpow.files.wordpress.com/2017/06/pneumatic-transverse-process-in-katepensaurus-ibiricu-et-al-2017-figure-4.jpg” orig-size=“1156,993” comments-opened=“1”

{.size-large .wp-image-14133 .aligncenter loading=“lazy” attachment-id=“14133” permalink=“http://svpow.com/2017/05/23/omnh-2162-probable-dorsal-2-of-the-big-apatosaur/omnh-2162-apato-d2-anterior-view/” orig-file=“https://svpow.files.wordpress.com/2017/05/omnh-2162-apato-d2-anterior-view.jpg” orig-size=“2272,1704” comments-opened=“1”