Figures 20-24 from: Jameson M, Drumont A (2013) Aroid scarabs in the genus Peltonotus Burmeister (Coleoptera, Scarabaeidae, Dynastinae): key to species and new distributional data. ZooKeys 320: 63-95. https://doi.org/10.3897/zookeys.320.5352

Figures 20-24 - Head (dorsal view) showing characters of the labrum, mandible, and clypeus. 20 Peltonotus karubei (apex of labrum deeply bi-lobed; apex of mandible rounded laterally) 21 Peltonotus malayensis (apex of labrum bi-emarginate; apex of mandible rounded laterally) 22 Peltonotus vittatus (apex of labrum bi-emarginate; apex of mandible rounded laterally) 23 Peltonotus nasutus (apex of labrum weakly sinuate; apex of mandible quadrate laterally with broadly truncate apex; apex of clypeus with weak tubercle in male) 24 Peltonotus morio (apex of labrum weakly sinuate; apex of mandible quadrate laterally with broadly truncate apex; apex of clypeus without tubercle in male).