Anisopinae: Anisops camaroonensis (Figures 30(a) and 30(b)), Anisopssardea, Buenoa uhleri (Figures 30(c) and 30(d)) Notonectinae: Notonecta glauca (Figure 31(a)-31(g)), Enithares bergrothi (Figures 32(a)-32(d)), Nychia sappho (Figures 33(a)-33(e)).
Moreover, there is a third type of the connection, represented by the midventral condyle situated on the proximal edge of the fourth segment in some Naucoridae (Limnocorinae Limnocoris lutzi Figure 23(f), Cryphocricinae Ambrysus occidentalis Figure 24(e); Naucorinae: Ilyocoris cimicoides Figure 25(b), Pelocoris femoratus Figure 25(g), Macrocoris rhantoides, Figure 26(b); Neomacrocoris handlirschi, Figure 26(e)) Pleidae (Figure 28(b)), Helotrephidae (Figure 29(d)) and Notonectidae (Buenoa uhleri Figure 30(d), Notonecta glauca Figure 31(g), Enithares bergrothi Figure 32(c)).
Moreover, in the present study, a specific shape of the triangular plate has been indicated; that is, the nodules on the distal part of this area are distinctly visible in Notonecta glauca (autapomorphic character) while in the remaining species of the Notonectidae the triangular plate is planar.
