The identification of late Bathonian beds and the position of the boundary between the Bathonian and Callovian in Kutch, western India, continued to be elusive until recently. The dominant ammonite faunas show strong endemism and thus are of little value in worldwide age correlations. The present paper records Epistrenoceras Bentz from the Patcham Formation of Jumara, which is regarded as a biological stopwatch indicating only the upper Bathonian. This find, together with other recently recorded time-diagnostic forms, now resolves the uncertainties.

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