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Taxonomic bias

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Model Systems, Taxonomic Bias, And Sexual Selection: Beyond Drosophila
Zuk, M., Garcia-Gonzalez, F. Herbestein, M. E. and Simmons, L. W. 2014 Model Systems, Taxonomic Bias, And Sexual Selection: Beyond Drosophila Annual Review of Entomology, 59: 321-338

While model systems are useful in entomology, allowing generalizations to be made based on a few well-known species, they also have drawbacks. It can be difficult to know how far to generalize from information in a few species: are all flies like Drosophila? The use of model systems is particularly problematic in studying sexual selection, where variability among taxa is key to the evolution of different behaviors. A bias toward use of a few insect species, particularly Drosophila, is evident in the sexual selection and sexual conflict literature over the last several decades, although the diversity of study organisms has increased more recently. As the number of model systems used to study sexual conflict increased, support for the idea that sexual interactions resulted in harm to females decreased. Future work should choose model systems thoughtfully, combining well-known species with those that can add to the variation that allows us to make more meaningful generalizations.