Semiardistomis exspectatus Valdes 2012

Measurements and variation. Variation of measurements (mm) and ratios for Semiardistomis exspectatus sp.n. (n=10) are: HL = 0,64–0,68–0,74; PL = 1,09–1,18–1,28; PW = 1,28–1,35–1,44; EL = 3,20–3,37–3,68; EW = 2,14–2,32–2,66; SBL = 4,93–5,24–5,70; PW/EW = 0,58; PW/PL = 1,14; PL/EL = 0,35; EW/EL = 0,69. Habitus. Fig. 38. Body piceous with green reflections, mouthparts and antennae testaceous, legs ferrugineous. Frons, gena, antennal lobes, pronotum, proepisternum and elytra smooth. Prosternum with microsculptural mesh pattern isodiametric. Metasternum and abdominal sterna with microsculpture in form of a shallow transverse mesh pattern. Anterior marginal setae on pronotal disc equidistant between anterior angles and posterior setae. Elytral disc with 4 setae in interval 3. Abdominal sternum VII with ambulatory setae near base, 2 on each side; inner pair of preapical setae equidistant each other. Profemur glabrous. Ventral surface of protibia with many setae on basal half. Clypeus with anterior margin concave medially; lateral lobes distinct, projected at the same level of anterior margin. Frontal impressions deep and wide. Supraantennal lobes with median sulci across their length. Eyes prominent. Antennomere 2 shorter than antennomere 3; antennomeres 4–10 about 1.9 times longer than wide. Mentum with median carina extended distad slightly beyond anterior margin of lateral lobes; pit organs opened through oval orifices to the mental- submental suture. Pronotum ovate, lateral border reaching base. Elytra oval, humeri curved, striae complete in their length, impunctate; visible humeral tooth at junction of third stria with marginal channel. Metathoracic wingsmacropterous. Genitalia as described for the puncticollis species–group.

(Fig. 57). Widespread in the northern parts of South America, east of the Andes mountain range.