Articles written in Journal of Biosciences
Volume 38 Issue 2 June 2013 pp 339-349 Articles
Dietary diversification and variations in the number of labrum sensilla in grasshoppers: Which came first?
Assia Zaim Daniel Petit Lahsen ElGhadraoui
The diversity of the diet of grasshoppers (Acrididae, Orthoptera) is related to multiple factors, including the chemoreceptors on the antennae, palps and on the epipharyngeal face of the labrum. In the present study, we sought to understand the nature of the diet of 12 Moroccan acridian species and to try to relate various aspects of their diet to the number of labrum sensilla. If the effect of the labrum size on the number of sensilla is removed, four groups of species are recorded:
polyphagous species with a broad diet and numerous sensilla;
polyphagous species with a graminivorous diet and numerous sensilla;
oligophagous species feeding exclusively on Poaceae and with a medium number of sensilla; and
strictly monophagous species feeding on a single plant species and with the smallest number of sensilla.
These observations show the close relationship between the diet and the number of labrum sensilla. However,
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