Omorgus (Omorgus) badeni ( Harold, 1872 )

Costa-Silva, Vinícius, Strümpher, Werner P. & Vaz-de-Mello, Fernando Z., 2021, Review of the Brazilian species of Omorgus Erichson, 1847 (Coleoptera: Trogidae: Omorginae), Journal of Natural History 54 (31 - 32), pp. 1993-2024 : 2001-2002

Omorgus (Omorgus) badeni ( Harold, 1872)

( Figure 3 a-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 lectotype designated); Zídek 2013: 7 (catalogue); Zídek 2017: 98 (catalogue).

Type material examined

Lectotype (♂, RBINS, through photographs, Figure 3 a-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/ Ceara Brasil’ [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.

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 ʹ W, tabuleiro forest [type of vegetation], pitfall with faeces, xi .2001, A .A . Andres leg . (1 ♂ CEMT) . Bahia, Sento Sé, Parque Nacional do Boqueirão da OnÇa , 09°55’S 41°37 ʹ W, ii– iii .2014, Salomão leg . (3 ♀, 2 ♂ CEMT; 1 ♂ CVMD) .

Diagnosis

Omorgus badeni is 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 borrei have 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 badeni occurs in the BA, CE, PE and RN states (Caatinga biome) ( Figure 9 ).

Figures

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.

Figure 9. Distribution of Omorgus borrei, O. badeni and O. loxus in the Brazilian territory. Green triangle with small black point inside refers to approximate type locality of O. badeni (‘Ceará’).