Abstract

The New Providence Shale Member of the Borden Formation contains a diverse assemblage of crinoids that are part of the Button Mold Knob fauna. Fourteen species of nonendemic crinoids indicate an age equivalency of the Button Mold Knob fauna with the faunas of the Keokuk Limestone and its correlative units. Thirty-six taxa of crinoids were recognized from the study of disarticulated calyx paltes. The cyathocrine inadunate Cyathocrinites astralus n. sp. and the flexible Lecocrinus? springeri n. sp. are described.--Modified journal abstract.

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