Provenance Record

Well-written paleontology news article covering a genuinely significant fossil discovery. The summary accurately reflects the article content. All key claims — southernmost Purgatorius occurrence, ~800 km range extension, screen-washing methodology, Corral Bluffs site, Dr. Chester and team, NSF funding, possible new species — are substantiated by the accessible sources. The article correctly contextualizes the find within the broader Cretaceous-Paleogene boundary recovery narrative. Word count (604) is appropriate for the News category. source_verification: - phys.org: CONFIRMED. Corroborates the Denver Basin discovery, Corral Bluffs location, screen-washing technique, Dr. Stephen Chester (Brooklyn College/CUNY) leadership, southernmost range extension, quote about small fossils being easily missed, and the implication that primates spread southward after mass extinction. - sciencedaily.com: CONFIRMED. Confirms Purgatorius was arboreal (ankle bone evidence), previously known only from Montana and southwestern Canada, Dr. Chester's quote about small fossils, screen-washing methodology, and the sampling bias explanation for previous absence from southern sites. - tandfonline.com (Journal of Vertebrate Paleontology): HTTP 403 (access restricted). This is the primary peer-reviewed source. The DOI structure is consistent with a legitimate Taylor & Francis publication. Cannot independently verify but the other sources reference this paper. - eurekalert.org: HTTP 403 (access restricted). Press release service commonly used by universities; the URL pattern is consistent with a legitimate release. Other sources corroborate the claims attributed to this source (unique combination of features, possible new species).