Akamboja tenebrae Roza & Quintino & Mermudes & Silveira 2017, sp. nov.

Akamboja tenebrae sp. nov. Roza, Quintino, Mermudes & Silveira

(Figs 31–35 and 44)

Etymology. tenebrae is an adjective, and means shades or darkness of the night in Latin. It is a reference to the dark coloration of the pronotum of the species compared to the others of the genus. Name in apposition.

Diagnosis. Pronotum dark brown (Fig. 31). Eyes occupying half of head width, in lateral view (Fig. 33). Vertex occupying? of head in dorsal view (Fig. 35). Apical maxillary palpomere 3.5x longer than subapical (Fig. 33). Elytron reaching the anterior margin of the second abdominal segment (Fig. 31).

Description, male.

Measurements (n=6): Total length: 3.4–4.3 mm (aver. 3.9 mm). Head length: 0.57–0.61 mm (aver. 0.58 mm). Head width: 0.55–0.61 mm (aver. 0.59 mm). Pronotum length: 0.53–0.59 mm (aver. 0.55 mm). Pronotum maximum width: 0.5–0.55 (aver. 0.52 mm). Elytron length: 1.05–1.23 mm (aver. 1.13 mm). Elytron maximum width: 0.37–0.43 mm (aver. 0.39 mm). Elytral spot length: 0.16–0.24 mm (aver. 0.2 mm).

Morphology: Eyes occupying half head width, in lateral view (Fig. 33). Lateral region of the head sparsely setose posterior to eyes (Fig. 34). Vertex occupying? of head in dorsal view (Fig. 35). Apical maxillary palpomere 3.5x longer than subapical (Fig. 33). Head as wide as long. Elytron 3x longer than wide (Fig. 31), Elytron reaching the anterior margin of the second abdominal segment (Fig. 31), apical spot occupying a fifth of the elytron (Fig. 31).

Coloration. Body overall brown to dark brown. Pronotum dark brown. Elytron almost black to dark brown, apex pale yellow. Wing venation dark brown.

Immatures and females. Unknown.

Biology and distribution. Akamboja tenebrae sp. nov. seems to occur only on spring, although this can be an artifact due to the low number of specimens. It inhabits high altitudinal areas of Andradas, on the Serra da Mantiqueira mountain range, around 1000 m.

Remarks. This species resembles Akamboja caparaoensis sp. nov., but can be distinguished mainly due to its smaller size and elytron (the elytron of Akamboja tenebrae sp. nov. reaches the anterior margin of the second abdominal segment, while in Akamboja caparaoensis sp. nov. it reaches the anterior margin of the third), head more sparsely setose behind the eyes (densely setose in Akamboja caparaoensis sp. nov.), bigger vertex (smaller in Akamboja caparaoensis sp. nov.) and its lower altitude occurrence (higher altitude occurrence in Akamboja caparaoensis sp. nov.).

Type material. Holotype (male): BRAZIL. Minas Gerais: Andradas. Malaise VI, 22°04’40.3’’S, 46°35’53.7’’W, 1066 m, 1 male, 16.X.2009 (MZSP). Paratypes (all males): BRAZIL. Minas Gerais: Same label as holotype, 3 males (MZSP); Same label as holotype, 3 males (DZRJ).