Other illustrations of a similar character are mentioned under the head of heterogamy (p. 196).
The heterogamy of the allied Coccid is practically the same as that of the Aphid.
Alterations in the position of the sexual organs are spoken of under the head of heterogamy.
heterogamy: applied to those cases in which two sexual or a sexual and parthenogenetic generation alternate.
Another interesting type of heterogamy is that which has been long known in the Aphides.
heterogamy het·er·og·a·my (hět'ə-rŏg'ə-mē)
The state or condition in which conjugating gametes are dissimilar in structure and size as well as in function.