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Genitalic autogrooming: a self-filling trash collection system in crickets

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Abstract

Insects groom almost all parts of the body surface with their legs and mouth parts. However, some body regions are difficult to reach and keep clean. One is the genital chamber located in the last abdominal segment in males which houses the phallic complex for copulation and production of the spermatophore. In the male cricket, foreign substances can enter the genital chamber when it is opened during copulation and spermatophore formation. Moreover, the dorsal pouch and ventral lobes of the phallic complex, which mould the attachment plate, tube, and ampulla of the spermatophore, are inevitably soiled as a result of spermatophore production. We found a unique cleaning system in which foreign substances accumulated during copulation and spermatophore debris left in the dorsal pouch after copulation are quickly removed and collected in special pockets in the genital chamber. This trash is collected by undulation of the genital chamber’s membranous floor which is entirely covered by small scales (∼10 μm) similar to those in the ovipositor of female crickets. This self-filling trash collecting system may be used in some other insects which produce the spermatophore in a similar manner to that of crickets.

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Acknowledgement

We thank L. Field for critical reading and comments on the manuscript.

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Authors and Affiliations

  1. Division of Bioscience, Graduate School of Natural Science and Technology, Okayama University, Tsushima-Naka 3-1-1, Okayama, 700-8530, Japan

    M. Kumashiro, Y. Tsuji & M. Sakai

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  1. M. Kumashiro
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  2. Y. Tsuji
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  3. M. Sakai
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Correspondence to M. Sakai.

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Kumashiro, M., Tsuji, Y. & Sakai, M. Genitalic autogrooming: a self-filling trash collection system in crickets. Naturwissenschaften 93, 92–96 (2006). https://doi.org/10.1007/s00114-005-0068-8

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  • DOI: https://doi.org/10.1007/s00114-005-0068-8

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