![\"\"](\"https:\/\/carleton.ca\/timpatterson\/wp-content\/uploads\/Journal.Vertebrate.Paleontology-240x313.png\")
<\/td>\nContribution 216<\/h4>\nMoore, B.R.S., Evans, D.C., Ryan, M.J., Patterson, R.T., Mallon, J.C. 2026. The ontogenetically youngest known pachycephalosaur (Dinosauria: Ornithischia) postcranium. Journal of Vertebrate Paleontology. Article: e2616325, 19 p. \u00a0DOI: 10.1080\/02724634.2026.2616325<\/a><\/h4>\n<\/p>\n
Read the PDF<\/a><\/h4>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n- Read the Abstract - Contribution 216<\/a><\/dt>
<\/p>\n
Moore et al. 2026. The ontogenetically youngest known pachycephalosaur (Dinosauria: Ornithischia) postcranium. Journal of Vertebrate Paleontology. Article: e2616325, 19 p. \u00a0DOI: 10.1080\/02724634.2026.2616325<\/a><\/h4>\nPachycephalosaurian dinosaurs are represented in the fossil record primarily by their taphonomically resistant frontoparietal domes, that developed fully only at maturity. Consequently, the postcranial record of Pachycephalosauria is poor, particularly for immature forms. Here, we describe the ontogenetically youngest known, and Canada\u2019s second-most complete, pachycephalosaur postcranium, collected from the uppermost Maastrichtian Frenchman Formation, Saskatchewan. Despite its small size (estimated total length ~ 90 cm), the skeleton shows several characters diagnostic of Pachycephalosauria, including a double ridge and groove articulation on the pre- and postzygapophyses of the dorsal neural arches, a medial flange on the postacetabular process of the ilium, and a highly reduced pubis that contributes only minimally to the acetabular margin. Histological sectioning of the crural bones shows an immature woven bone texture. The absence of cyclical or annual growth indicators suggests that this specimen was less than a year old at the time of death. Phylogenetic analysis recovers the specimen as a member of Pachycephalosaurinae, perhaps related to Prenocephale, but the lack of cranial data for our specimen and the complementary lack of postcranial data for other pachycephalosaurs make this determination tenuous. Spatiotemporal considerations suggest a possible but currently untestable affiliation with Sphaerotholus buchholtzae. The relatively long hindlimbs of the juvenile compared to those of adult pachycephalosaurs indicate probable negative ontogenetic allometry in the hindlimbs..
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2026 Contribution 216 Moore, B.R.S., Evans, D.C., Ryan, M.J., Patterson, R.T., Mallon, J.C. 2026. The ontogenetically youngest known pachycephalosaur (Dinosauria: Ornithischia) postcranium. Journal of Vertebrate Paleontology. Article: e2616325, 19 p. \u00a0DOI: 10.1080\/02724634.2026.2616325 Read the PDF<\/p>\n","protected":false},"author":16,"featured_media":0,"parent":606,"menu_order":1,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_relevanssi_hide_post":"","_relevanssi_hide_content":"","_relevanssi_pin_for_all":"","_relevanssi_pin_keywords":"","_relevanssi_unpin_keywords":"","_relevanssi_related_keywords":"","_relevanssi_related_include_ids":"","_relevanssi_related_exclude_ids":"","_relevanssi_related_no_append":"","_relevanssi_related_not_related":"","_relevanssi_related_posts":"","_relevanssi_noindex_reason":"","_mi_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":"","_links_to":"","_links_to_target":""},"yoast_head":"\n
Patterson Lab Publications 2026-2028 - Professor Tim Patterson, Ph.D<\/title>\n<meta name=\"description\" content=\"2026 Contribution 216 Moore, B.R.S., Evans, D.C., Ryan, M.J., Patterson, R.T., Mallon, J.C. 2026. The ontogenetically youngest known pachycephalosaur\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/carleton.ca\/timpatterson\/publications\/patterson-lab-publications-2026-2028\/\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/carleton.ca\/timpatterson\/publications\/patterson-lab-publications-2026-2028\/\",\"url\":\"https:\/\/carleton.ca\/timpatterson\/publications\/patterson-lab-publications-2026-2028\/\",\"name\":\"Patterson Lab Publications 2026-2028 - Professor Tim Patterson, Ph.D\",\"isPartOf\":{\"@id\":\"https:\/\/carleton.ca\/timpatterson\/#website\"},\"datePublished\":\"2026-03-16T15:12:53+00:00\",\"dateModified\":\"2026-03-16T15:21:04+00:00\",\"description\":\"2026 Contribution 216 Moore, B.R.S., Evans, D.C., Ryan, M.J., Patterson, R.T., Mallon, J.C. 2026. 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The ontogenetically youngest known pachycephalosaur","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/carleton.ca\/timpatterson\/publications\/patterson-lab-publications-2026-2028\/","twitter_misc":{"Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/carleton.ca\/timpatterson\/publications\/patterson-lab-publications-2026-2028\/","url":"https:\/\/carleton.ca\/timpatterson\/publications\/patterson-lab-publications-2026-2028\/","name":"Patterson Lab Publications 2026-2028 - Professor Tim Patterson, Ph.D","isPartOf":{"@id":"https:\/\/carleton.ca\/timpatterson\/#website"},"datePublished":"2026-03-16T15:12:53+00:00","dateModified":"2026-03-16T15:21:04+00:00","description":"2026 Contribution 216 Moore, B.R.S., Evans, D.C., Ryan, M.J., Patterson, R.T., Mallon, J.C. 2026. 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<\/p>\n
Read the PDF<\/a><\/h4>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n- Read the Abstract - Contribution 216<\/a><\/dt>
<\/p>\n
Moore et al. 2026. The ontogenetically youngest known pachycephalosaur (Dinosauria: Ornithischia) postcranium. Journal of Vertebrate Paleontology. Article: e2616325, 19 p. \u00a0DOI: 10.1080\/02724634.2026.2616325<\/a><\/h4>\nPachycephalosaurian dinosaurs are represented in the fossil record primarily by their taphonomically resistant frontoparietal domes, that developed fully only at maturity. Consequently, the postcranial record of Pachycephalosauria is poor, particularly for immature forms. Here, we describe the ontogenetically youngest known, and Canada\u2019s second-most complete, pachycephalosaur postcranium, collected from the uppermost Maastrichtian Frenchman Formation, Saskatchewan. Despite its small size (estimated total length ~ 90 cm), the skeleton shows several characters diagnostic of Pachycephalosauria, including a double ridge and groove articulation on the pre- and postzygapophyses of the dorsal neural arches, a medial flange on the postacetabular process of the ilium, and a highly reduced pubis that contributes only minimally to the acetabular margin. Histological sectioning of the crural bones shows an immature woven bone texture. The absence of cyclical or annual growth indicators suggests that this specimen was less than a year old at the time of death. Phylogenetic analysis recovers the specimen as a member of Pachycephalosaurinae, perhaps related to Prenocephale, but the lack of cranial data for our specimen and the complementary lack of postcranial data for other pachycephalosaurs make this determination tenuous. Spatiotemporal considerations suggest a possible but currently untestable affiliation with Sphaerotholus buchholtzae. The relatively long hindlimbs of the juvenile compared to those of adult pachycephalosaurs indicate probable negative ontogenetic allometry in the hindlimbs..
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2026 Contribution 216 Moore, B.R.S., Evans, D.C., Ryan, M.J., Patterson, R.T., Mallon, J.C. 2026. The ontogenetically youngest known pachycephalosaur (Dinosauria: Ornithischia) postcranium. Journal of Vertebrate Paleontology. Article: e2616325, 19 p. \u00a0DOI: 10.1080\/02724634.2026.2616325 Read the PDF<\/p>\n","protected":false},"author":16,"featured_media":0,"parent":606,"menu_order":1,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_relevanssi_hide_post":"","_relevanssi_hide_content":"","_relevanssi_pin_for_all":"","_relevanssi_pin_keywords":"","_relevanssi_unpin_keywords":"","_relevanssi_related_keywords":"","_relevanssi_related_include_ids":"","_relevanssi_related_exclude_ids":"","_relevanssi_related_no_append":"","_relevanssi_related_not_related":"","_relevanssi_related_posts":"","_relevanssi_noindex_reason":"","_mi_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":"","_links_to":"","_links_to_target":""},"yoast_head":"\n
Patterson Lab Publications 2026-2028 - Professor Tim Patterson, Ph.D<\/title>\n<meta name=\"description\" content=\"2026 Contribution 216 Moore, B.R.S., Evans, D.C., Ryan, M.J., Patterson, R.T., Mallon, J.C. 2026. The ontogenetically youngest known pachycephalosaur\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/carleton.ca\/timpatterson\/publications\/patterson-lab-publications-2026-2028\/\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/carleton.ca\/timpatterson\/publications\/patterson-lab-publications-2026-2028\/\",\"url\":\"https:\/\/carleton.ca\/timpatterson\/publications\/patterson-lab-publications-2026-2028\/\",\"name\":\"Patterson Lab Publications 2026-2028 - Professor Tim Patterson, Ph.D\",\"isPartOf\":{\"@id\":\"https:\/\/carleton.ca\/timpatterson\/#website\"},\"datePublished\":\"2026-03-16T15:12:53+00:00\",\"dateModified\":\"2026-03-16T15:21:04+00:00\",\"description\":\"2026 Contribution 216 Moore, B.R.S., Evans, D.C., Ryan, M.J., Patterson, R.T., Mallon, J.C. 2026. 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- Read the Abstract - Contribution 216<\/a><\/dt>
<\/p>\n
Moore et al. 2026. The ontogenetically youngest known pachycephalosaur (Dinosauria: Ornithischia) postcranium. Journal of Vertebrate Paleontology. Article: e2616325, 19 p. \u00a0DOI: 10.1080\/02724634.2026.2616325<\/a><\/h4>\n
Pachycephalosaurian dinosaurs are represented in the fossil record primarily by their taphonomically resistant frontoparietal domes, that developed fully only at maturity. Consequently, the postcranial record of Pachycephalosauria is poor, particularly for immature forms. Here, we describe the ontogenetically youngest known, and Canada\u2019s second-most complete, pachycephalosaur postcranium, collected from the uppermost Maastrichtian Frenchman Formation, Saskatchewan. Despite its small size (estimated total length ~ 90 cm), the skeleton shows several characters diagnostic of Pachycephalosauria, including a double ridge and groove articulation on the pre- and postzygapophyses of the dorsal neural arches, a medial flange on the postacetabular process of the ilium, and a highly reduced pubis that contributes only minimally to the acetabular margin. Histological sectioning of the crural bones shows an immature woven bone texture. The absence of cyclical or annual growth indicators suggests that this specimen was less than a year old at the time of death. Phylogenetic analysis recovers the specimen as a member of Pachycephalosaurinae, perhaps related to Prenocephale, but the lack of cranial data for our specimen and the complementary lack of postcranial data for other pachycephalosaurs make this determination tenuous. Spatiotemporal considerations suggest a possible but currently untestable affiliation with Sphaerotholus buchholtzae. The relatively long hindlimbs of the juvenile compared to those of adult pachycephalosaurs indicate probable negative ontogenetic allometry in the hindlimbs..
\n<\/p><\/dd>- <\/div>\n
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2026 Contribution 216 Moore, B.R.S., Evans, D.C., Ryan, M.J., Patterson, R.T., Mallon, J.C. 2026. The ontogenetically youngest known pachycephalosaur (Dinosauria: Ornithischia) postcranium. Journal of Vertebrate Paleontology. Article: e2616325, 19 p. \u00a0DOI: 10.1080\/02724634.2026.2616325 Read the PDF<\/p>\n","protected":false},"author":16,"featured_media":0,"parent":606,"menu_order":1,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_relevanssi_hide_post":"","_relevanssi_hide_content":"","_relevanssi_pin_for_all":"","_relevanssi_pin_keywords":"","_relevanssi_unpin_keywords":"","_relevanssi_related_keywords":"","_relevanssi_related_include_ids":"","_relevanssi_related_exclude_ids":"","_relevanssi_related_no_append":"","_relevanssi_related_not_related":"","_relevanssi_related_posts":"","_relevanssi_noindex_reason":"","_mi_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":"","_links_to":"","_links_to_target":""},"yoast_head":"\n
Patterson Lab Publications 2026-2028 - Professor Tim Patterson, Ph.D<\/title>\n<meta name=\"description\" content=\"2026 Contribution 216 Moore, B.R.S., Evans, D.C., Ryan, M.J., Patterson, R.T., Mallon, J.C. 2026. 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