Mississippian (middle Osagean) ammonoids from the Nada Member of the Borden Formation, Kentucky

D. M. Work, and C. E. Mason

2003

Article

Journal of Paleontology 77(3):593-596

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Taxa discussed in this work:

• Polaricyclus bordenensis
• Winchelloceras allei

Taxonomy:

• Polaricyclus bordenensis belongs to Polaricyclus - Work and Mason (2003)
• Winchelloceras allei belongs to Winchelloceras - Work and Mason (2003)
• Goniatites pygmaeus belongs to Winchelloceras allei - Work and Mason (2003)