As I recall from paleontology class, the same foram species might reproduce sexually or asexually.
quote:
The alternation of sexual and asexual generations is common in Foraminifera species. Asexual haploid generations form a large inner chamber known as the proloculus; these are termed megalospheric. The proloculus is smaller when produced by sexual diploid generations; these are termed microspheric. Reproductive cycles tend to be short.
Source:
Foraminifera - microbewiki
Now, maybe a biologist can step in and expand on this.
Nothing to do with sex, but more on forams:
Foraminifera - WikipediaIntroduction to the Foraminifera
(not a biologist) Moose
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