2.1. Specimens

2.2. Measurements, illustrations, terminology, and techniques

2.3. Character coding and phylogenetic integrity

2.4. Phylogenetic analyses

2.5. Male genitalia character optimisation

3.1. Systematics

Key to species of the Belostoma plebejum group sensu Nieser based on adult specimens (with new species included)

3.2. Phylogeny of the B. plebejum group sensu Nieser (1975)

3.3. Effect of progressively adding continuous characters

3.4. Congruence between different methods and the effect of homology accumulation

3.5. Evolution of characters based on male genitalia

4.1. The monophyly of the B. plebejum group s.l. is corroborated and there is also some evidence of the monophyly of the B. plebejum s.s. and B. pygmeum groups

4.2. Belostoma micantulum is not supposed to have phylogenetic integrity

4.3. The effects of using different methods, in general, seem to be much more visible than using different combinations of continuous characters