Foraminifera source details
Orr, W. N.; Zaitzeff, J. B. (1971). A new planktonic foraminiferal species from the California Pliocene. Journal of Foraminiferal Research. 1: 17-19.
187993
Orr, W. N.; Zaitzeff, J. B.
1971
A new planktonic foraminiferal species from the California Pliocene
Journal of Foraminiferal Research
1: 17-19
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Globigerina umbilicata Orr & Zaitzeff, 1971 accepted as Globigerina bulloides d'Orbigny, 1826 (original description)