Euschistus (Euschistus) palacitus Rolston 1971

(Figs 3, 12–14, 24, 33–35, 51–53, 62)

Male genitalia: Pygophore quadrate. Dorsal rim constricted anterolaterally, in dorsal view (Fig. 12); median projection of dorsal rim short, sinuosity shallow; superior processes of dorsal rim present, tooth-like, one dorsal to paramere and the other laterally to superior layer of ventral rim laterally (Fig. 13). Ventral rim bilobed, concave medially in ventral view (Fig. 14). In posterior view, ventral rim smooth. Paramere: margin connecting basal and apical process deeply concave; apical process rounded apically; middle process developed, rounded and slightly projected (Fig. 24).

Female genitalia: Posterior margin of gonocoxites VIII concave; posterolateral margin of gonocoxites VIII projected posteriorly, reaching at most middle of gonocoxites IX. Gonocoxites IX around 2.5 times wider than long, somewhat trapezoidal, lateral margins strongly rounded; anterior and posterior margins of gonocoxites IX straight (Fig. 51). Laterotergites IX surpassing dorsal band that unites laterotergites VIII in posteroventral view. Posterior region of ductus receptaculi proximalis dilated in a cup-like sclerotized structure. Ductus receptaculi distalis slightly dilated adjacent to anterior annular flange. Pars intermedialis sclerotized apically (Fig. 62).