It remains unclear what contribution different speciation modes have made to contemporary diversity and whether certain life history attributes (e.g., herbivory and dietary specialization) predispose organisms to particular speciation modes. Several speciation mechanisms, including host shifts and diapause modifications in sympatry or allopatry, have been proposed for the sawfly genus Neodiprion (Hymenoptera: Diprionidae), a group of North American conifer-feeding insects. Phylogenetic analyses of DNA sequence data are presented to infer the direction and number of shifts among host species and overwintering mode and to elucidate patterns of species formation in the genus Neodiprion.
Species 1: Hymenoptera Diprionidae Neodiprion
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