LISTRODERES-ABDITUS OR ANTARCTOBIUS-ABDITUS - A SIMULTANEOUS ANALYSISOF LARVAL AND ADULT CHARACTERS (COLEOPTERA, CURCULIONIDAE)

The weevil species Listroderes abditus Enderlein belongs in the subtri be Listroderina. This species had been previously transferred to Antar ctobius, based on characters from the adult morphology. However, larva l characters suggest that it was placed correctly in Listroderes. A cl adistic analysis of this species and nine other rhytirrhinines for whi ch larvae are known was performed, based on 56 morphological character s (32 from larvae and 24 from adults). According to the single cladogr am obtained (78 steps, CI = 0.65, and RI = 0.72), L. abditus should be included in Listroderes rather than in Antarctobius. Larval and adult characters were also analysed separately, leading to poorer resolutio n in comparison with the simultaneous analysis, and suggesting that a stable classification requires the analysis of data from both life sta ges.