1 June 2021 Gynandromorphism and intersexuality in Odonata: a review
Andreas Martens, Hansruedi Wildermuth
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Gynandromorphism is a rare phenomenon among insects, and as measured by the number of publications, particularly so in Odonata. The first case of gynandromorphism in the order was reported in 1866, the second in 1917. To date, 56 chimeric individuals have been described in 45 papers. Bilateral gynandromorphs account for about a third of all cases, the remainder consisting of phenotypical mosaics of male and female characters exhibited in wing patterns, genitalia, or other body parts. There are no patterns of gynandromorphism exclusive to Odonata. Here, as a basis for future work, we provide an overview as complete as possible of the known cases in the order of gynandromorphism in a broad sense, including intersexuality. This is the third review on this topic: the first dates from 1929 and the second from 1971, supplemented in 1975. In the last ten years, all new records have been based on photographic evidence rather than collected specimens, a practice which has its limitations and may skew the data by recording only the most obvious of cases. For future research it is recommended that specimens should not only photographed in the field but also collected and preserved for detailed description and analysis in the laboratory. In addition, researchers should be alive to the possibility of finding gynandromorphs in final instar larvae and exuviae.

Andreas Martens and Hansruedi Wildermuth "Gynandromorphism and intersexuality in Odonata: a review," Odonatologica 50(1-2), 65-80, (1 June 2021). https://doi.org/10.5281/zenodo.4746242
Received: 26 October 2020; Accepted: 25 March 2021; Published: 1 June 2021
andromorphic females
gynomorphic males
phenotypic mosaics
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