The dinosaurs of the niobrara chalk formation (upper cretaceous, kansas)

Kenneth Carpenter, David Dilkes, David B. Weishampel

Research output: Contribution to journalArticlepeer-review

59 Scopus citations


The dinosaurian fauna of the Niobrara Chalk Formation constitutes the best known assemblage from the middle Santonian-early Campanian interval of the Late Cretaceous of North America. The fauna consists of both hadrosaurid ornithopods and nodosaurid ankylosaurs. The nodosaurid specimens from the Smoky Hill Chalk Member of the Niobrara Chalk Formation include the holotype of Hierosaurus sternbergii (here regarded as nomen dubium), material of " Hierosaurus" coleii (herein designated the type species of the new genus Niobrarasaurus) and two specimens that may belong to N. coleii, but are better interpreted as Nodosauridae incertae sedis. Claosaurus agilis, the sole hadrosaurid from the Niobrara Chalk Formation, constitutes a poorly known, but distinct species having a basal relationship among remaining hadrosaurids.

Original languageEnglish (US)
Pages (from-to)275-297
Number of pages23
JournalJournal of Vertebrate Paleontology
Issue number2
StatePublished - Jun 13 1995

ASJC Scopus subject areas

  • Palaeontology


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