Eurygaster Laporte, 1833

Differential diagnosis. Seven genera of Scutelleridae have been recorded from Russia. Eurygaster can be distinguished from all other genera primarily by the widely exposed connexivum, which is clearly visible from above. In addition, Eurygaster (Fig. 7) differs from Irochrotus Amyot & Serville, 1843 (Fig. 2) and Odontoscelis Laporte, 1833 (Fig. 1) by the non-pilose body. Eurygaster also differs from Poecilocoris Dallas, 1848 (Fig. 5) by the body coloration and size. Phimodera Germar, 1839 (Fig. 4) may be distinguished from Eurygaster in having almost rectangular head. Russian species of Psacasta Germar, 1839 (Fig. 3) have a pattern of bright whitish or pale yellow small spots on dorsum whereas Eurygaster spp. are never spotted. Odontotarsus Laporte, 1833 (Fig. 6) clearly differs from Eurygaster in the body shape, which is distinctly narrowed posteriorly in the former and broadly rounded in the latter.