Required for intestinal cell division following the 16E cell stage of embryogenesis. Regulates intestinal cell divisions and binucleations probably by modulating the activity of the cell cycle regulator wee-1.3 and by activating the cdk-1/cyb-1 complex. Plays a role in male tail development, via regulation of the cell divisions of the ray precursor cell lineages, perhaps acting together with cell cycle regulators cyl-1, cdk-1, cyb-3, and cyd-1