Patrognathus and Siphonodella (Conodonta) from the Kinderhookian (Lower Mississippian) of Western Kansas and Southwestern Nebraska

Abstract

Late Kinderhookian conodont faunas occur in the subsurface of Kansas and Nebraska. Patrognathus andersoni is a new species that is associated with late Kinderhookian phylogenetic developments of Siphonodella in a well core from Logan County, Kansas, and also 300 feet above the base of the Lodgepole Limestone at Browns Gulch, Montana. Other occurrences of P. andersoni in the subsurface and in the Gilmore City Limestone of Iowa appear to be stratigraphically higher than the Siphonodella succession, but are assumed to be late Kinderhookian in the absence of evidence to the contrary.