A phylogenetic hypothesis of relationships among the species of the broad-nosed weevil genus Panscopus Schönherr indicates sister-taxon relationships between pairs of species, and pairs of ancestral lineages, which today exhibit disjunctions between their geographical distributions. The range disjunctions in these sister lineages appear to correlate with known geological or palaeoecological events. These correlates suggest dates of later Eocene to Miocene for some branching points in the phylogeny. These observations are consistent with the hypothesis that one or more ancestral form(s) of Panscopus were extant by the Eocene or earlier, and that most of the cladogenesis in the history of this genus occurred likely in middle to late Tertiary times. These hypotheses, in turn, suggest that adelognathan weevils must be a much older group than the oldest known representative fossils would suggest (Eocene), and that they likely arose during the Mesozoic.