Arthrobrachus nigromaculatus Solier, 1849

Estrada, Patricia, 2016, Species of the genus Arthrobrachus Solier, 1849 (Coleoptera: Melyridae) distributed to the East of the Andes, Zootaxa 4092 (3), pp. 371-387 : 382

Arthrobrachus nigromaculatus Solier, 1849

( Figure 7 )

Arthrobrachus scutellaris Philippi & Philippi, 1864: 273 ; Estrada & Solervicens 1999: 45 Arthrobrachus subaeneus Philippi & Philippi, 1864: 272 ; Estrada & Solervicens 1999: 45 Arthrobrachus nigromaculatus var. solieri Pic, 1919: 10 ; Estrada & Solervicens 1999: 45 Arthrobrachus vicinus Pic, 1919:10 ; Estrada & Solervicens 1999: 45

Arthrobrachus impressithorax Pic, 1919:10 ; Estrada & Solervicens 1999: 45

Diagnosis. Elytra black or black with two red areas of a variable size; antennae with five preapical dilated antennomeres ( Fig. 7 g); pronotum with a deep impression adjacent to the posterior angle; male ventrite 6 divided in two large and convergent plates; parameres with conspicuous median carina, its sides bend ventrally at the base forming a semi-cylindrical cavity for the median lobe; tegmen with a well developed dorsal flange at the base of the parameres and strongly sclerotized ventral plate, tegminal arms gradually converging to the apodeme ( Fig. 7 a–c); median lobe slighty sinuated in lateral view, with membranous dorsal surface and wide basal flection area ( Fig. 7 d–f).

Distribution. ARGENTINA: provinces of Mendoza, Neuquén, Rio Negro and Chubut. CHILE: between provinces of Elqui and General Carrera ( Fig. 10 ).

Figures

FIGURE 7. Male genitalia of Arthrobrachus nigromaculatus. Tegmen and parameres: a: dorsal view; b: ventral view; c: lateral view; Median lobe: d: dorsal view; e: ventral view; f: lateral view; Antenna: g. Scale 0.5 mm

FIGURE 10. Geographic distributions of: A. antonioi n. sp, red line area; A. armandoi n. sp. dark blue solid area; A. eloisae n. sp. green solid area; A. flavomarginatus, light green horizontal lines area; A. nigromaculatus, blue vertical lines area; A. ruftarsis, light blue solid area; A. solervicensi n. sp. dark cyan horizontal lines area.