Key to the known species of Antipetalops gen. nov.

1 Pronotum including the collar pale orange, with posterior margin black; antennal segment IV uniformly dark castaneous orange; dorsal abdominal segments black with median pale yellow longitudinal stripe running from III to mid third of segment VII; head dorsally and ventrally black with the space between eye and ocelli, and narrow longitudinal stripe running between ocelli to base of post-tylar sulcus yellow (Fig. 4).............................................. A. colombianus sp. nov.

- Pronotum dark brown with anterior third included the calli castaneous orange; antennal segment IV brown with wide castaneous orange ring near middle third; dorsal abdominal segments III–VI pale orange, VII–IX black; head dorsally and ventrally pale castaneous orange (Fig. 5)............................................................... A. discretus sp. nov.