Figures 18–26. Mouthparts. 18 in Delimiting baridine weevil evolution (Coleoptera: Curculionidae: Baridinae)

Figures 18–26. Mouthparts. 18, Oligolochus ornatus, right mandible, showing tridentate mandible in which the first incisor is largest; 19, Plocamus clavisetes, right mandible, showing tridentate mandible in which all incisors are subequal in size; 20, Eisonyx opaca, right mandible, showing tridentate mandible in which the second incisor is largest; 21, Parallelosomus amplitarsis, right mandible, showing bidentate mandible in which the first incisor is largest; 22, Torcus nigrinus, right mandible, showing tridentate mandible in which the first incisor is largest; 23, Coleomerus boliviensis, right mandible, showing monodentate mandible produced by fusion of incisors and molar region; 24, Oligolochus bracatus, right maxilla, showing distinct row of setae near distal margin of palpiger; 25, Anthinobaris sp., right maxilla, showing distinct row of setae near distal margin of palpiger; 26, Loboderes citriventris, right maxilla, showing a rather scattered positioning of setae near distal margin of palpiger.