Figure 1 from: Cifuentes-Ruiz P, Zaragoza-Caballero S, Ochoterena-Booth H, Morón Rios M (2014) A preliminary phylogenetic analysis of the New World Helopini (Coleoptera, Tenebrionidae, Tenebrioninae) indicates the need for profound rearrangements of the classification. ZooKeys 415: 191-216. https://doi.org/10.3897/zookeys.415.6882

Figure 1 - Examples of external characters (mainly diagnostic), traditionally used in Helops, Tarpela and Nautes, (number of character: character state): A broad apical antennomere (5:0), shorter than the third antennomere (4:0) illustrated from Helops aereus Germar B filiform apical antennomeres (5:2), as long as the third antennomere (4:1) illustrated from Nautes fervidus Pascoe C male maxillary palps with length of inner edge 2.6–2.9 times the length of posterior edge (7:2) illustrated from Nautes chrysomeloides Champion D third lobate segment of male tarsi (30:0) and short fourth tarsomere (31:0) illustrated from Nautes fervidus E not prominent prosternum (27:1) in Helops cisteloides Germar F prominent-acute prosternum (27:0) in Nautes fervidus.