Maximum parsimony inference from analysis six (all datasets under implied weights, K = 3). Consensus of four most parsimonious trees (L = 142.3, CI = 0.44, RI = 0.74, fit = 14.61) with non-ambiguous discrete characters optimised. Apart from non-ambiguous character optimisation, the discrete characters based on male genitalia and their states are indicated on male genitalia sketches and are coloured accordingly. Green character labels and their optimisations refer to the characters based on male genitalia. Numbers inside circles refer to character numbers and coloured circles indicate the states of each aforementioned character. Clades are coloured according to traditional classification: Belostoma plebejum group (black clades) and B. pygmeum group (light blue clades). The coloured names refer to the taxa whose phylogenetic integrity was not corroborated. Coloured squares refer to consistency index values. Outgroups were omitted. Abbreviation: CI, consistency index.