Dalmatomammurius heissi is a species of true bugs in the family leaf-footed bugs. The general coloration of this species tends to be a brownish or grayish hue, which helps it blend in with plant material. Like other leaf-footed bugs, Dalmatomammurius heissi feeds on plant material, primarily using its piercing-sucking mouthparts to extract sap from leaves, stems, and occasionally fruits.