SCANNING ELECTRON MICROSCOPIC INVESTIGATING DIFFERENT TYPE OF SENSORY SENSILLAE ON THE HEAD APPENDAGES OF ASIAN TIGER MOSQUITO, AEDES ALBOPICTUS (SKUSE)

Document Type : Original Article

Authors

1 Department of Entomology, Faculty of Science, Cairo University, Giza,

2 Department of Zoology, Faculty of Science, Zagazig University, Zagazig, Egypt

Abstract

In Aedes albopictus various types of sensillae were on the head and its appendages with distinct
morphological features. The antennae and maxillary palps play a major role in host detection,
and other sensory-mediated behaviors. Six long sensilla chaetica were arranged in circular
shape and spread uniformly across the diameter of the antennal flagellomers. Maxillary
palp is a relatively simple organ compared to antennae, consists of five segments, which densely
covered dorsal side with flattened scales, but chemosensory sensilla on ventral side. Thus,
a desirable model for exploring neuromolecular networks surrounds chemo- and mechanosensation.
Proboscis analyses gustatory code via food intake and involved in identification. Labellum
exhibits the most of sensory structures on the proboscis. Numerous sensillatrichoidea distribute
on antennal flagellomers.
A significant difference in diameter of sensillacoeloconica that protruding from distal tip of
antennal flagellomers. Sensillachaetica with greater morphological variation were distributed
throughout Ae. albopictus head and appendages. Variation between different sensillae indicates
their functions. Aporous sensilla play the mechanoreceptive role but, porous sensilla
were contact chemoreceptors and olfactory ones. sensory mechanisms were extensive
studied, about Asian tiger mosquito, Ae. albopictus sensory systems is insufficient.

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