Campanian ammonites from the upper Cretaceous Gober Chalk of Lamar County, Texas

The Roxton Limestone Member at the top of the Gober Chalk in northeast Texas yields a rich fauna, do Baculites haresi Reeside, 1927, and Inoceramus balticus Boehm, 1909, with sparse occurrences of Pach 1963), Anapachydiscus sp. juv., Placenticeras placenta (DeKay, 1828), Hoplitoplacenticeras aff. H. p (Delawarella) delawarensis (Morton, 1830), M. (D.) danei (Young, 1963), M. (D.) aff. M. (D.) vanuxem vandalinaense Young, 1963, Submortoniceras sp., Eubostrychoceras sp., and Scaphites hippocrepis (DeK The presence of S. hippocrepis III suggests a late early Campanian age assignment for the fauna. The known from the Western Interior, Gulf Coast, Atlantic seaboard, and western Europe.
The Campanian ammonites from the Roxton Limestone member of the upper Cretaceous Gober Chalk in Lamar County, TX, are described. Baculites haresi and Inoceramus balticus dominated the formation, whereas Pachydiscus cf. P. paulsoni, Anapachydiscus sp., Hoplitoplacenticeras aff. H. plasticum, Placenticeras placenta, Menabites danei, M. delawarensis, M. vanuxemi, Submortoniceras vandalinaense Young, Submortoniceras sp., Eubostrychoceras and Scaphites hippocrepis III were sparsely distributed. Late early Campanian assignment for the assemblage is based on the occurrence of S. hippocrepis III.