Examples from the Web for heterogamy
The heterogamy of the allied Coccid is practically the same as that of the Aphid.
Other illustrations of a similar character are mentioned under the head of Heterogamy (p. 196).
Heterogamy: applied to those cases in which two sexual or a sexual and parthenogenetic generation alternate.Explanation of Terms Used in Entomology|John. B. Smith
Alterations in the position of the sexual organs are spoken of under the head of Heterogamy.
Another interesting type of heterogamy is that which has been long known in the Aphides.