On the earliest known occurrence of the Middle Jurassic ammonite genus Reineckeia in the Upper Bathonian of Jumara, Kachchh, western India

Sreepat Jain, John H. Callomon, Dhirendra K. Pandey

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Two specimens of the Middle Jurassic ammonite genus Reineckeia (sensu lato) have been found in the lowest beds of the Pachchham (Patcham) Limestones exposed in the core of the Jumara Dome, Kachchh (Kutch), Gujarat, western India. The stratigraphy is described in detail and the age bracketed to lie between latest Late Bathonian and Middle Bathonian, older than any previously described examples of this genus, either in India or in Europe (middle Early Callovian). The new finds are compared with other known pre-Callovian Reineckeiidae, notably those of the eastern borders of the Pacific, but the relationships are not close. The phylogenetic consequences are briefly discussed. The roots of the Reineckeiidae continue to lie hidden.

Original languageEnglish
Pages (from-to)129-143
Number of pages15
JournalPaläontologische Zeitschrift
Issue number1-2
Publication statusPublished - 03-1996


All Science Journal Classification (ASJC) codes

  • Palaeontology

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