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Article: Note on Operculinoides Hanzawa 1935

Publication: Palaeontology
Volume: 2
Part: 1
Publication Date: October 1959
Page(s): 156 160
Author(s): Y. Nagappa
Addition Information

How to Cite

NAGAPPA, Y. 1959. Note on Operculinoides Hanzawa 1935. Palaeontology2, 1, 156–160.

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The Palaeontological Association (Free Access)


Operculinoides Hanzawa as understood now consists of three distinct groups of forms typically represented by (a) Nummulites willcoxi Heilprin, (b) Operculina ocalana Cushman, and (c) O. bermudezi D. K. Palmer. It is shown that (a) can justifiably come under Nummulites, (b) may be regarded as involute Operculina, and for (c) there is Caudri's genus Ranikothalia which is based on valid grounds.
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