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Ultrastructure of antennal sensilla of female Ceratosolen solmsi marchali (Hymenoptera: Chalcidoidea: Agaonidae: Agaoninae)

Published online by Cambridge University Press:  02 April 2012

Zongbo Li ,
Pei Yang ,
Yanqiong Peng  and
Darong Yang
Zongbo Li
Affiliation:
Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Kunming 650223, People's Republic of China, and Graduate University of the Chinese Academy of Sciences, Beijing 100039, People's Republic of China
Pei Yang
Affiliation:
Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Kunming 650223, People's Republic of China, and Graduate University of the Chinese Academy of Sciences, Beijing 100039, People's Republic of China
Yanqiong Peng
Affiliation:
Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Kunming 650223, People's Republic of China
Darong Yang*
Affiliation:
Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Kunming 650223, People's Republic of China
*
1Corresponding author (e-mail: Yangdr@xtbg.ac.cn).
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Abstract

Fig-pollinating wasps are phytophagous wasps that mainly use olfaction to locate their fig (Ficus L., Moraceae) hosts. To provide a morphological framework for studying agaonid olfaction, we examined the antennal sensilla of female Ceratosolen solmsi marchali Mayr by scanning and transmission electron microscopy. We identified and characterized (ultrastructure, distribution, abundance, and position) 13 types of sensilla: multiporous placoid sensilla (types 1 and 2), basiconic sensilla (types 1 and 2), basiconic capitate peg sensilla, sensilla chaetica (types 1–3), sensilla trichodea, sensilla coeloconica (types 1–3), and one specialized sensillum regarded as a sensillum obscurum. We suggest that five types are chemoreceptors because they are porous and innervated by multiple sensory neurons. Sensilla coeloconica type 1 may also function as chemoreceptors, based on external morphology. Other sensilla may be involved in mechanoreception, thermo- and (or) hygro-reception, or pressure detection. We discuss our results in relation to the lifestyle of C. solmsi marchali.

Résumé

Les guêpes pollinisatrices des figuiers sont des guêpes phytophages qui utilisent surtout l'odorat pour trouver leurs figuiers (Ficus L., Moraceae) hôtes. Nous étudions aux microscopes électroniques à balayage et à transmission les sensilles des antennes des femelles de Ceratosolen solmsi marchali Mayr afin de mettre au point un cadre morphologique pour l'étude de l'olfaction chez les agaonidés. Nous identifions et caractérisons (ultrastructure, répartition, abondance et position) treize types de sensilles: des sensilles placoïdes à pores multiples (types 1 et 2), des sensilles basiconiques (types 1 et 2), des sensilles basiconiques en bâtonnet capité, des sensilles chétiformes (types 1–3), des sensilles trichoïdes, des sensilles coeloconiques (types 1–3) et une sensille spécialisée considérée comme une « sensille obscure ». Nous croyons que cinq des types de sensilles sont des chimiorécepteurs parce qu'elles portent des pores et sont innervées par de nombreux neurones sensoriels. Les sensilles coeloconiques de type 1 fonctionnent peut-être aussi comme chimiorécepteurs, d'après leur morphologie externe. Les autres sensilles sont peut-être impliquées dans la mécanoréception, la thermoréception et (ou) l'hygroréception ou la détection de la pression. Nous discutons de nos résultats en relation avec le mode de vie de C. solmsi marchali.

[Traduit par la Rédaction]

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Articles
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The Canadian Entomologist , Volume 141 , Issue 5 , October 2009 , pp. 463 - 477
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Copyright © Entomological Society of Canada 2009

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