Precibarial and cibarial chemosensilla in the whitefly, Bemisia tabaci (Gennadius) (Homoptera: Aleyrodidae)

The internal anatomy of the anterior alimentary canal of the whitefly, Bemisia tabaci (Gennadius) (Homoptera: Aleyrodidae) B-biotype, was examined by light, scanning, and transmission electron microscopy to elucidate the location and number of precibarial and cibarial gustatory sensilla. Elucidation...

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Bibliographic Details
Published in:International journal of insect morphology & embryology 1996-07, Vol.25 (3), p.295-304
Main Authors: Hunter, Wayne B., Hiebert, Ernest, Webb, Susan E., Polston, Jane E., Tsai, James H.
Format: Article
Language:English
Subjects:
Aleyrodidae
Bemisia tabaci
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Summary:The internal anatomy of the anterior alimentary canal of the whitefly, Bemisia tabaci (Gennadius) (Homoptera: Aleyrodidae) B-biotype, was examined by light, scanning, and transmission electron microscopy to elucidate the location and number of precibarial and cibarial gustatory sensilla. Elucidation of the epipharyngeal organ complex within the precibarium revealed 10 precibarial sensilla located proximal to where the paired maxillary stylets diverge on their retraction. The sensory organ complex within the cibarium consists of 8 sensilla, 6 on the epipharyngeal sclerite with 2 found within the hypopharyngeal sclerite. Fine structure investigation revealed the individual neurons to terminate at sensillar pores, which allow direct contact with passing fluids, thus supporting a chemosensory function. Ultrastructure of the neurons is similar to that of precibarial and cibarial gustatory chemosensilla found in other piercing-sucking insects. Their importance to whitefly feeding is discussed.
ISSN:0020-7322
1872-907X
DOI:10.1016/0020-7322(95)00002-X