Dichotomius (Luederwaldtinia) machadoi Martínez & Pereira, 1967

(Figures 6 A–E)

Dichotomius machadoi Martínez & Pereira, 1967, p. 55 (description); Dichotomius machadoi, Vaz-de-Mello 2000, p. 193 (checklist)

Material examined: Paratypes: BRASIL: Pernambuco. Serra Negra. V-1960. ABM Machado.leg [1♂, 1♀ MZSP]; Additional specimens: Floresta. Serra Negra. Cow dung. Wet Forest. VII-2012. RV Nunes & GM De-la- Torre [3♂, 2♀ CEMT]; Floresta. Reserva Biológica Serra Negra. XII-2012. RV Nunes & GM De-la-Torre [4♂ CEMT].

Diagnosis. This species is separated of the other species in the group by the following combination of characters: cephalic carina very low, with a weak pair of tubercles (Figs 6 A–C); males excavation at the anterior portion of the hypomeron bearing few sparse setae; females excavation at the hypomeron very weak, almost absent; pronotal disc wrinkled and bearing deep punctures (Figs 6 A–C) and elytral interstriae strongly wrinkled and lacking distinct punctures (Figs 1 E, 6A–B). This species has a detailed description in the work of Martínez and Pereira (1967) and therefore does not need a re-description.

Distribution. Since its description, D. machadoi has been collected only in "Brejo de Altitude" forests at the Biological Reserve of Serra Negra, municipalities of Floresta, Inajá and Tacaratu Pernambuco, Brazil (Fig. 7). The Brejo de Altitude forests are moist forests found on the higher parts of hills and plateaus in the Brazilian Caatinga, a semi-arid brazilian biome.