Platynoptera flavohumeralis OPITZ, nov.sp. (Figs. 78, 127, 128, 164, 175)

Holotype: ♂. Brésil, Prov. Mato Grosso, P. Germain, 1986 (MNHN) . Paratypes: One specimen. Peru: Yurimaguas, Chambireyacú, Juin-Aout, 1885, M. de Mathan (WOPC).

Diagnosis: This is the only member of Platynoptera that has a broad flavotestaceous streak that extends backwards from the humeral angle.

Description: Size: Length 12.0 mm; width 4.0 mm. Form: As in Fig. 164. Color: Cranium mostly black, vertex with small flavotestaceous streak: clypeus flavotestaceous; pronotum bicolorous, lower sides and center of disc black, upper sides and triangular portion extending back from anterior margin flavotestaceous; mesoscutellum black; elytra bicolorous, mostly black, flavotestaceous behind humerus, with postmedial flavotestaceous fascia. Head: Antennal capitulum long (Fig. 78), basal capitular antennomere longer than combined length of funicular antennomeres; antennal carina very prominent; EW/FW 20/20. Thorax: Pronotum elongate, anterior margin not projected at middle, side margin of disc with shallow tubercle; PW/PL 60/70; elytral not strongly explanate at sides, carina faintly visible; EL/EW 270/70. Abdomen: Male pygidium not incised at distal margin; Aedeagus (Figs. 127, 128); phallic apex subacuminate.

Natural history: The holotype was collected in a time frame between June and October.

Distribution (Fig. 175): Known from Peru and Brazil.

Etymology: The trivial name flavohumeralis, is a Latin compound name that stems from flavus (= yellow) and humerus (= shoulder). I refer to the color of the elytral humerus.