pachycephalosaurid love



from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Any member of the Pachycephalosauridae.


Sorry, no etymologies found.


  • This synonymy reduces the number of pachycephalosaurid taxa from the Upper Cretaceous of North America and demonstrates the importance of cranial ontogeny in evaluating dinosaur diversity and taxonomy.

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  • Now, with a greater number of pachycephalosaurid skulls from the Upper Cretaceous of the Western Interior of North America available for study, and the use of comparative cranial morphology, histology and computer tomography, multiple lines of evidence support our alternative hypothesis that

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  • The position of the squamosal horns and nasal nodes are consistent in these four pachycephalosaurid skulls, which increase in overall length and size from youngest (G, H) to oldest (A, B).

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  • A coronal histological section of a pachycephalosaurid skull previously referred to

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  • This ontogenetic pattern contributed to the naming of some new pachycephalosaurid taxa based on diagnostic characters (large supratemporal fenestrae, squamosal horns, nodal cranial ornamentation, inflated frontoparietal dome) that we demonstrate in this study are, in fact, ontogenetic features that undergo extreme modification as the skull length increases, the cranial vault enlarges and the frontoparietal dome expands.

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  • This synonymy significantly reduces the number of Upper Cretaceous pachycephalosaurid taxa.

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  • Additionally, woven bone with minimal osteonal deposition is indicative of early osteogenesis, whereas dense Haversian or reconstructed tissues are indicative of later osteogenesis A growth series of Pachycephalosaurus wyomingensis skulls and cranial elements from youngest to oldest, plus two pachycephalosaurid skulls examined in this study.

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  • The intrafrontal suture (black arrow) is open internally supporting the subadult status of this pachycephalosaurid.

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