List of investigated Broscini samples with sample numbers corresponding to numbers in Figures, including species name, genes sequenced per specimen and sampling locations.

(M. = Mecodema; Meta = Metaglymma; O. = Oregus; D. = Diglymma; S.I. = South Island New Zealand; N.I. = North Island New Zealand; BOP = Bay of Plenty; genes analysed: a = COI, COII, 16S, 18S; b = COI, COII, 16S; c = COI, 18S; d = COI; LUNZ = Lincoln University Entomological Research Museum; P = S.M. Pawson collection); COI sequences from samples of the Mecodema ingroup marked with * have previously been deposited in Genbank (#JN409817–JN409904) [18].