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Striate Nummulites (:Foraminiferida) from the Early Oligocene Rocks of Southwestern Kutch


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1 Department of Geology, University of Calcutta, 35 Ballygaunge Circular Road, Kolkata - 700 019, India
     

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Megalospheric form of a striate Nummulites, provisionally identified here as Nummulites sp. aff. chavannesi de la Harpe, is documented from the Early Oligocene rocks of SW Kutch, Gujarat. This striate Nummulites occurs in association with N. fichteli-clipeus Group, N. cf. fichteli, Heterostegina, Operculina and Gypsina. High abundance of microspheric tests of reticulate Nummulites and virtual absence of microspheric tests of striate Nummulites reflect contrasting success of growth and sexual reproduction of the two groups of sympatric Nummulites.

Keywords

Nummulites sp. aff. chavannesi de la Harpe, Oligocene, Kutch, Gujarat.
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  • Striate Nummulites (:Foraminiferida) from the Early Oligocene Rocks of Southwestern Kutch

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Authors

S. Sengupta
Department of Geology, University of Calcutta, 35 Ballygaunge Circular Road, Kolkata - 700 019, India

Abstract


Megalospheric form of a striate Nummulites, provisionally identified here as Nummulites sp. aff. chavannesi de la Harpe, is documented from the Early Oligocene rocks of SW Kutch, Gujarat. This striate Nummulites occurs in association with N. fichteli-clipeus Group, N. cf. fichteli, Heterostegina, Operculina and Gypsina. High abundance of microspheric tests of reticulate Nummulites and virtual absence of microspheric tests of striate Nummulites reflect contrasting success of growth and sexual reproduction of the two groups of sympatric Nummulites.

Keywords


Nummulites sp. aff. chavannesi de la Harpe, Oligocene, Kutch, Gujarat.

References