After reading contradictory claims of model status for some insect species, we feel a brief discussion of the topic may be useful. Here, we document a few examples where clarity on model status seems to be lacking, briefly review work on widely recognized models, and offer criteria for including any given species as a model organism.
Keywords: Arabidopsis thaliana; Caenorhabdus elegans; Drosophila melanogaster; model.
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