Figure 4 in Taxonomic revision of the South American genus Polynoncus Burmeister, 1876 (Coleoptera: Scarabaeoidea: Trogidae)

Figure 4. Differential morphology in Polynoncus spp.: a, without humeral callus [P. hemisphaericus]; b, with humeral callus [P. longitarsis]. Apex of mesotibia c, with tooth [P. peruanus] and d, without tooth (white arrow) [P. crypticus]. Posterior margin of clypeus e, emarginate [P. bullatus] and f, truncate (white arrow) [P. hemisphaericus]; pronotal ridges of pronotum in g, Polynoncus argentinus and h, Polynoncus pseudogemmifer sp. n. (paratype). Scale bar: 1 mm.