Abstract
Eucalyptus snout beetles (Curculionidae: Gonipterus
scutellatus complex), native to mainland Australia and Tasmania,
defoliate Eucalyptus trees and are considered important pests.
Since the 19th century, species of the G. scutellatuscomplex have been introduced to other continents. Here, we document the
presence of Eucalyptus snout beetles in Ecuador and use
ecological niche models to analyze their potential distribution in South
America. Phylogenetic analyses of DNA sequences unambiguously
demonstrated that the Ecuadorian specimens belong to the speciesG. platensis , which has low genetic diversity compared with other
species in the complex. Ecological niche models revealed several areas
of high to intermediate climatic suitability for the pest in South
America, even in countries where it has not been registered, like Peru
and Bolivia. Accurate identification of species in the Gonipterusscutellatus complex and understanding of their potential
distribution are essential tools for improved management and prevention
tactics.