Sexual identity and sexual attractiveness of a gynandromorph of the lawn ground cricket,Polionemobius mikado (Orthoptera: Trigonidiidae) |
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| Authors: | Katsuya Taniyama Kaori Onodera Kazuhiro Tanaka |
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| Institution: | 1. Graduate School of Agricultural Science, Tohoku University, Sendai, Japan;2. , Sendai, Japan;3. General Education Division, Miyagi Gakuin Women's University, Sendai, Japan |
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| Abstract: | A gynandromorph adult of the lawn ground cricket Polionemobius mikado (Shiraki, 1913) (Orthoptera: Trigonidiidae) was collected from a natural population. It had complete male forewings and a female ovipositor at the end of abdomen. A normal male that encountered the gynandromorph performed a courtship song and tried to transmit a spermatophore, whereas a normal female was indifferent to the gynandromorph. The gynandromorph showed aggressive behavior toward the normal male but not against the normal female. The gynandromorph raised its forewings immediately after the antenna touched the body of the normal male and female, but no sound was produced. Overall, the gynandromorph behaved as a male, but was courted by conspecific males. Thus, the sexual identity of the gynandromorph was masculine, but sexual attractiveness was feminine. |
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| Keywords: | aggressive behavior courtship behavior external morphology sexual recognition song type |
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