Uploaded January 2023 | Updated September 2026, 1 week ago

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Two really cool Hell Creek Pachycephalosaurids have been desrcibed, Stygimoloch and Dracorex. But now these two are entrenched in a debate. Were they valid genera or younger forms of Pachycephalosaurus? #dinosaurs #paleontology

Giga Video: youtu.be/OGDuCkCXhGI
JFC Rant: youtu.be/MpEb-lX3sdc
Planet Dinosaur Review: youtu.be/yA9yfOlSaBE
PK Operation Genesis: youtu.be/UQxay_SHBqQ

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Sources
2016 Skull Paper: tandfonline.com/doi/abs/10.1080/02724634.2016.1078343?journalCode=ujvp20

2009 Summary: The early expression of squamosal horns and parietal ornamentation confirmed by new end-stage juvenile Pachycephalosaurus fossils from the Upper Cretaceous Hell Creek Formation, Montanahttps://newsarchive.berkeley.edu/news/media/releases/2009/10/30_dino_demise.shtml

Horner Presentation: youtu.be/kQa11RMCeSI

Prenocephale: thesauropodomorphlair.wordpress.com/2020/08/17/prenocephale-stegoceras-growing-up

Private collection: science.org/content/article/baby-tyrannosaur-s-ebay-auction-sparks-outrage

Separate Ages: ncbi.nlm.nih.gov/pmc/articles/PMC5699823

Sereno Paper: ncbi.nlm.nih.gov/pmc/articles/PMC2762616
Tiny Skull: eartharchives.org/articles/paleontologists-uncover-the-tiniest-bonehead-dinosaur/index.html

Tiny Skull 2: nationalgeographic.com/science/article/paleontologists-uncover-the-tiniest-bonehead