Abstract
THE sibling leafhopper species Muellerianella fairmairei (Perris, 1857) and M. brevipennis (Boheman, 1847) (Homoptera, Delphacidae) are widely sympatric in Europe. Studies of the biological differences between the two species, and of their hybridisation has revealed a remarkably high proportion of females of M. fairmairei sampled in the field and a gradual disappearance of males in laboratory colonies. M. brevipennis had a normal sex ratio in field samples and when reared in the laboratory1. Additional cytogenetic studies now demonstrate that in M. fairmairei a pseudogamous female triploid biotype coexists with the diploid bisexual form.
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References
Drosopoulos, S., Ent. Berichten, 35, 154–157 (1975).
White, M. J. D., Animal Cytology and Evolution, 961 (Cambridge University Press, Cambridge, 1973).
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DROSOPOULOS, S. Triploid pseudogamous biotype of the leafhopper Muellerianella fairmairei. Nature 263, 499–500 (1976). https://doi.org/10.1038/263499a0
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DOI: https://doi.org/10.1038/263499a0
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