A scheme for the evolution of the methods of spermatophore formation among pterygotan insects is proposed. There appear to be four methods of spermatophore formation, two male-determined and two female-determined. The male-determined methods are characteristic of the less advanced pterygotans that have fairly complex spermatophores, and the female-determined types are typical of more advanced insects in which the spermatophores are often reduced.
No takes yet. Share an insight, caveat, or question.
G. H. Gerber (1970) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: