Cactaceae 6 Cereus (angiosperm) 6 fly 6 host plant 6 wing morphology 6 Cactus 4 Diptera 4 Drosophila antonietae 4 Drosophila gouveai 4 Drosophilidae 4 Geometric morphometrics 4 Morphological evolution 4 Neotropical region 4 Phenotypic plasticity 4 Pilosocereus 4 divergence 4 evolution 4 morphometry 4 phenotypic plasticity 4 speciation (biology) 4 Cactophilic Drosophila 2 Drosophila buzzatii 2 Drosophila koepferae 2 Echinopsis 2 Habitat selection 2 Life history traits 2 Natural breeding resource 2 Optimal oviposition behaviour 2 Opuntia 2 Opuntia sulphurea 2