Dichotomius (Luederwaldtinia) machadoi Martínez & Pereira, 1967

Nunes, Rafael V., Carvalho, Marcela S. G. & Vaz-De-Mello, Fernando Z., 2016, Taxonomic review of the Dichotomius (Luederwaldtinia) assifer (Eschscholtz) species-group (Coleoptera: Scarabaeidae), Zootaxa 4078 (1), pp. 230-244 : 241-242

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.

Figures

FIGURE 1. Diagnostics characters of Dichotomius (Luederwaldtinia) assifer species-group. A – B. excavation of the anterior portion of the hypomeron indicated by the white arrows; C. setae concentrated at the sides of abdominal sternites indicated by the black arrows. The sixth abdominal sternite, wider than the other sternites and bearing a central knob; D. medial tooth at the apex of hind tibiae indicated by the black arrow; E. pronotal disc surface showing well defined punctures typical on D. affinis, D. angeloi sp. nov. and D. machadoi; F. pronotal disc surface generally lacking punctures, smooth and shining, typical of D. assifer and D. louzadai sp. nov.; G. smooth and shining elytral interstriae disc, typical of D. assifer and D. louzadai sp. nov.; H. wrinkled interstriae disc, typical of D. affinis, D. machadoi and D. angeloi sp. nov.

FIGURE 6. Dichotomius machadoi Pereira & Martínez. A. dorsal habitus of the male; B. dorsal habitus of the female; C. fronto-lateral view of the male head and pronotum; D. dorsal view of the paramera; E. lateral view of the aedeagus.

FIGURE 7. Distribution map of species in the Dichotomius (L uederwaldtinia) assifer species-group.