Abstract
Galls are an abnormal growth of plant tissue in response to the presence generally of an inducing insect, which ensures food and protection during specific periods of its life. Besides gall formers, a vast community of arthropods are associated with galls, including inquilines and parasitoids. Few studies have assessed the gall diversity and its associated insect community in Neotropical vascular plants. Here, we characterised the leaf gall diversity of Coccoloba barbadensis Jacq. (Polygonaceae) in a Mexican tropical dry forest, as well as their associated entomofauna based on morphology and DNA barcoding. Five different gall morphotypes were observed during both dry (April-June) and rainy (November) seasons. A total of 34 and 38 species of Diptera, Hymenoptera, Coleoptera, and Lepidoptera were delimited with the 2% divergence criterion and the GMYC model, respectively. Based on our rearing observations and literature, Cecidomyiidae (Diptera) species might induce all leaf gall morphotypes, whereas hymenopterans are represented by parasitoid and probably inquiline species of the families Braconidae, Eulophidae, Eupelmidae, Platygastridae and Torymidae. Our results highlight the importance of performing integrative species delineation studies of arthropods present in galls to have an accurate knowledge of their diversity and trophic interactions.
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