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KMID : 0381920070370040231
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Korean Journal of Microscopy
2007 Volume.37 No. 4 p.231 ~ p.238
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Fine Structure of the Antennal Sensilla of the Millipede Oxidus gracilis (Polydesmida: Paradoxomatidae)
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Chung Kyung-Hwun
Moon Myung-Jin
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Abstract
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Although the biological significance of the antennal sensillae to millipedes are widely understood, the structure and function of the antennal sensillae are still not clear and more precise analysis is required. Thus, this study initiate to reveal the fine structural characteristics of various sensory receptors on the antennae of millipede Oxidus gracilis were observed with field emission scanning electron microscopy (FESEM). The antennae generally include eight segments, called articles. On the surface of the antennae, there are a variety of sensory receptors which include olfactory and mechanical receptors. We could identify four different types of antennal sensillae in O. gracilis as follows: apical cone sensilla, trichoid sensilla, chatiform sensilla and basiconic sensilla. The most prominent is four large apical cone sensillae on distal tip of the 8th article. Both of trichoid and chaetiform sensillae are abundantly observed at the most of antennal articles. These sharply pointed structures are inclined and slightly curved toward the apex of the sensilla. The basiconic sensilla are
further divided into three subtypes: large basiconic sensilla (Bs1), small basiconic sensilla (Bs2) and spiniform
sensilla (Bs3). The Bs1 is located at the 5th and 6th articles, while the Bs2 and Bs3 can be seen at the 5th and 7th
articles, respectively.
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KEYWORD
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Antenna, Millipede, Oxidus gracilis, Sensilla
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