Trigonospila brevifacies is frequently confused with T. cingulata in locations where both species co-occur. T. cingulata appears to much more common than T. brevifacies, particularly in Queensland, New South Wales, and the Australian Capital Territory. It is believed T. cingulata is a parasitoid of chrysomelid beetle larvae in the genus Paropsis, which are abundant herbivores in many Australian environments. Only T. brevifacies is known to be present in New Zealand.
