Trox badeni Harold, 1872: 83 Arrow 1912: 54 Blackwelder 1944: 218 Vaurie 1962: 147 Omorgus borrei Omorgus ( Omorgus ) badeni : Scholtz 1990: 1416 Zídek 2013: 7 Zídek 2017: 98 Review of the Brazilian species of Omorgus Erichson, 1847 (Coleoptera: Trogidae: Omorginae) Costa-Silva, Vinícius Strümpher, Werner P. Vaz-de-Mello, Fernando Z. Journal of Natural History 2021 2021-02-16 54 31 - 32 1993 2024 49DQP (Harold, 1872) Harold 1872 [411,904,443,469] Insecta Trogidae Omorgus Animalia Coleoptera 9 2001 Arthropoda species badeni Omorgus  ( Figure 3a-c, 9)      Trox badeni Harold, 1872: 83(original description);  Arrow 1912: 54(catalogue);  Blackwelder 1944: 218(catalogue);  Vaurie 1962: 147(as junior synonym of  Omorgus borrei)  Omorgus( Omorgus) badeni: Scholtz 1990: 1416(revalidated, redescribed and lectotypedesignated);  Zídek 2013: 7(catalogue);  Zídek 2017: 98(catalogue).   Type material examined  Lectotype(  ♂, RBINS, through photographs, Figure 3a-c): First label [white, with red border]: ‘ Omorgus badeni/(Harold)/det Scholtz 1990 [Scholtz’s handwriting]/ LECTOTYPE’ [typeset in red]. Second label [beige, with green border]: ‘Badeni/ Ceara/Bras. Sept. Baden [Candèze’s handwriting]. Third label [white]: det. [typeset] Harold 1872[unknown handwriting]/ T. badeni/Harold/Type/ CearaBrasil’ [Harold’s handwriting]. Fourth label [red]: ‘Coll. R. I. Sc. N. B./Brazil [typeset] Ceara/ex. Baden/ ex coll. Candèze’ [unknown handwriting]. Type locality:  BRAZIL: Ceará.   Figure 3.Lectotype of  Trox badeni Harold, 1872(now  Omorgus badeni). A, dorsal view; B, lateral view and C, lectotype labels (Photos by Jonathan Brecko, copyright RBINS). Length of specimen: 7.5 mm.  Additional material examined    BRAZIL: Rio Grande do Norte, Parnamirim, iii.1950, M.F.A leg. (1 MZSP).   Paraíba, Mamanguape, Reserva Biológica Guaribas[Biological Reserve of Guaribas], 6°41’S 35° 10 ʹW, tabuleiro forest [ typeof vegetation], pitfallwith faeces, xi.2001, A .A. Andres leg . ( 1 ♂ CEMT).   Bahia, Sento Sé, Parque Nacional do Boqueirão da OnÇa, 09°55’S 41°37 ʹW, ii– iii.2014, Salomão leg . ( 3 ♀, 2 ♂ CEMT; 1 ♂ CVMD).   Diagnosis   Omorgus badeniis similar in appearance to  O. borrei. It can be distinguished from the latter by the presence of round shiny black tubercles on the odd-numbered elytral costae.  Omorgus borreihave the odd-numbered costae marked by distinct flat lustrous areas. For a more detailed treatment of  O. badeni, see Scholtz (1990).  Geographic distribution In Brazil,  Omorgus badenioccurs in the BA, CE, PE and RN states (Caatinga biome) ( Figure 9). [160,720,178,203] Parnamirim Brazil Rio Grande do Norte 10 2002 1 Rio Grande do Norte Brazil -6.6833334 Reserva Biologica Guaribas 1304 -35.166668 Mamanguape 10 2002 1 Paraiba [991,1013,247,272] Brazil true -6.6833334 Reserva Biologica Guaribas 1304 -35.166668 Mamanguape 10 2002 1 Paraiba CEMT Brazil 10 2002 1 1 Paraiba Brazil -9.916667 Parque Nacional do Boqueirao da OnCa 1298 -41.616665 Sento Se 10 2002 1 Bahia [393,696,316,341] CEMT, CVMD Brazil 10 2002 6 3 3 Bahia