1	Oral margin reduced, covered by microtrichia (Suppl. material 1: Fig. S37A). Distribution: western, central and southern Africa	planifacies species subgroup (Djan et al. 2020)
–	Oral margin notched, slightly produced forward (as in Suppl. material 1: Fig. S37B)	2
2	Metatrochanter with sparse pale pile (Suppl. material 1: Fig. S37C)	3
–	Metatrochanter with dense and strong yellow to red brush of pile (Suppl. material 1: Fig. S37D). Distribution: South Africa	melanocerus species subgroup (Radenković et al. 2018a)
3	Apical fourth of tibiae and all tarsi bright yellow; Afrotropical species (Zimbabwe)	Merodon cuthbertsoni Curran, 1939
–	Tarsi partly brown or black; Palaearctic species	murorum species group (Vujić et al. 2018b)