Goniocanthon Pereira & Martínez, 1956: 109 Goniocanthon Halffter & Martinez, 1977: 74 . Goniocanthon Martinez 1959: 49 Halffter 1961: 231 Vulcano & Pereira 1964: 592 Canthon (Goniocanthon) Vaz-de-Mello 2000: 191 Medina et al. 2001: 136 Vaz-de-Mello et al. 2011: 4 Canthon smaragdulus ( Fabricius, 1781 ) Taxonomic revision of the South American subgenus Canthon (Goniocanthon) Pereira & Martínez, 1956 (Coleoptera: Scarabaeidae: Scarabaeinae: Deltochilini) Nunes, Luis Gabriel de O. A. Nunes, Rafael V. Vaz-De, Fernando Z. European Journal of Taxonomy 2018 2018-05-23 437 1 31 6493V Pereira & Martinez, 1956 Pereira & Martinez 1956 [487,1101,1796,1824] Insecta Scarabaeidae Canthon Animalia Coleoptera 2 3 Arthropoda subGenus Goniocanthon      Goniocanthon Pereira & Martínez, 1956: 109.   Canton ( Goniocanthon)  Halffter & Martinez, 1977: 74.    Goniocanthon–  Martinez 1959: 49(catalogue). —  Halffter 1961: 231(monograph). —  Vulcano & Pereira 1964: 592(catalogue).    Canthon (Goniocanthon)–  Vaz-de-Mello 2000: 191(species list). —  Medina et al.2001: 136(species list). —  Vaz-de-Mello et al.2011: 4, 12, 19, 26, 34, 42 (key).   Type-species   Canthon smaragdulus( Fabricius, 1781), by original designation.    Diagnosis Among Scarabaeinae Latreille, 1802, the tribe Deltochiliniis characterized by having wing venation Radio Posterior 1 (RP1) with small basal appendix; venation Radio Anterior 4 (RA4) significantly thinner than RP1, and RA4 fused basally with RP1 ( Tarasov & Dimitrov 2016). Within the tribe, the subgenus  Goniocanthonis differentiated by the following combination of characters: two clypeal teeth; pronotal and elytral discs smooth, shiny and lacking lateral tubercles or carinae; hypomeron lacking transverse keel; metasternal anterior lobe convex or flat; pygidium convex; dorso-ventral surfaces of the body bearing metallic sheen; and ventral surface of metafemur not marginate anteriorly ( Halffter & Martínez 1977; Vaz-de-Mello et al.2011).