ADAPTATION FOR OVIPOSITION INTO CONCEALED CYCAD OVULES IN THE CYCAD WEEVILS ANTLIARHINUS-ZAMIAE AND A-SIGNATUS (COLEOPTERA, CURCULIONOIDEA)
ADAPTATION FOR OVIPOSITION INTO CONCEALED CYCAD OVULES IN THE CYCAD WEEVILS ANTLIARHINUS-ZAMIAE AND A-SIGNATUS (COLEOPTERA, CURCULIONOIDEA)
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DOI：
10.1111/j.1095-8312.1992.tb00653.x
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发表时间：
1992-09-01
影响因子：
1.9
通讯作者：
DONALDSON, JS
中科院分区：
文献类型：
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作者：
DONALDSON, JS
Antliarhinus zamiae(Thunberg) andA. signatusGyllenhal are the only insects known in which the larvae feed exclusively on the cycad gametophyte. In their host plants, species of the cycad genusEncephalartos(Zamiaceae), the gametophyte is protected by a three-layered integument and substantial sporophyll tissues. Adaptation for oviposition into the gametophyte may, therefore, be crucial to this feeding specialization. Ovipositional behaviour and ovipositor structure in four species ofAntliarhinussuggest that ovipositional traits suited to ovule predation preceded the evolution of this habit and that ovipositional traits in ancestral species provided the right environment for the evolution of ovule predation. Current ovipositional traits inA. zamiaeandA. signatusprobably represent responses to changes in cone structure after the evolution of ovule predation.
