Review of Placocoris Mayr, 1864 (Hemiptera: Pentatomidae: Discocephalinae: Ochlerini)

Placocoris Mayr, 1864 (Pentatomidae: Discocephalinae) is a Neotropical genus with two known species, Placocoris viridis Mayr, 1864 and Placocoris albovenosus Kormilev, 1949. Placocoris is easily distinguished from other Neotropical pentatomids by having a strongly flat body, and armed femora. The genus was recently transfered to the tribe Ochlerini based on morphological similarities with the genera in the Janeirona Distant, 1911 clade.

In this study we review Placocoris, describing for the first time the internal genitalia of the two species. We highlight the peculiar sexual dimorphism of the hind femora in both species. A distribution map is provided.