Phylogeny of the Pantomorus-Naupactus complex based on morphological and molecular data (Coleoptera:Curculionidae)

SCATAGLINI, MARÍA AMALIA; LANTERI, ANALÍA ALICIA; CONFALONIERI, VIVIANA ANDREA

CLADISTICS (PRINT)

Blackwell Publishing

Año: 2005 vol. 21 p. 131 - 142

0748-3007

The Pantomorus-Naupactus complex is a Neotropical group of broad-nosed weevils (Coleoptera: Curculionidae) including several parthenogenetic species usually assigned to Naupactus Dejean, Pantomorus Schoenherr, Asynonychus Crotch, Aramigus Horn, Eurymetopus Schoenherr and Graphognathus Buchanan. Sixteen species were studied to test hypotheses on their monophyly, and on the origin of the parthenogenetic lineages. A matrix of 30 morphological characters and 999 positions of the Cithocrome Oxidase I gene, was analyzed separately and simultaneously, under equal and implied weights, and different transversion/transitions costs. The ILD test indicates that the incongruence between the molecular and morphological data is not significant. Under equal weights the molecular data resulted in a single tree and morphology in 34 trees; under implied weights morphology gave a different tree, and under TV:TS ≥ 4:1 molecular and combined analyses resulted in the same optimal tree. According to the latter, Naupactus includes Graphognathus, and it is paraphyletic and basal regarding remaining genera, Pantomorus is polyphyletic and includes Aramigus and Asynonychus, and Eurymetopus is monophyletic. The species in which apomictic parthenogenesis has been verified (Aramigus tessellatus, Asynonychus cervinus and Graphognathus lecuoloma), belong to different clades of the Pantomorus-Naupactus complex, with basal sexual relatives.