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An Additional Aspect of Reproduction in the Orbitoididae

Engin Meriç
Micropaleontology
Vol. 17, No. 1 (Jan., 1971), pp. 99-104
DOI: 10.2307/1485039
Stable URL: http://www.jstor.org/stable/1485039
Page Count: 6
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
An Additional Aspect of Reproduction in the Orbitoididae
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Abstract

Specimens of the family Orbitoididae with more than one macrospheric embryo suggest that macrospheric embryos were formed at the center of individuals, proceeded through the test to the periphery and made their departure. The movement of these macrospheric embryos was facilitated by temporary chemical reactions in the protoplasm that caused dissolution of the chamber walls and allowed the embryos to pass. The occurrence of occasional multiembryo individuals along with large numbers of normal individuals is interpreted as indicative of true asexual reproduction rather than ecologically created variation.

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