Deliberations on the External Morphology and Modification of the Labial Segments in the Nepomorpha (Heteroptera: Insecta) with Notes on the Phylogenetic Characteristics

Figure 1

Various shapes of the apical plate in the Nepomorpha: Nepinae: (a) Curicta granulosa, (b) Borborophyes mayri, (c) Laccotrephes japonensis, (d) Nepa cinerea, Ranatrinae: (e) Cercotmetus asiaticus, (f) Ranatra chinensis, Ochteridae; (g) Ochterus marginatus, Aphelocheiridae: (h) Aphelocheirus aestivalis, Naucoridae: Limnocorinae: (i) Limnocoris lutzi, Helotrephidae: (j) Tiphotrephes indicus, (k) Hydrotrephes visayasensis, (l) Hydrotrephes balnearius, Belostomatidae: Belostomatinae: (m) Belostoma flumineum, (n) Deinostoma dilatatum, (o) Appasus major, (p) Hydrocyrius colombiae, (q) Limnogeton fieberi, Lethocerinae: (r) Lethocerus deyrollei, Gelastocoridae: Nerthrinae: (s) Nerthra nepaeformis, Gelastocorinae: (t) Gelastocoris oculatus, Pleidae: (u) Paraplea frontalis, Notonectidae: Anisopinae: (w) Anisops camaroonensis, Notonectinae: (v) Nychia sappho, (x) Enithares bergrothi, (y) Notonecta glauca. Naucoridae: Cheirochelinae: (z) Cheirochela feana, (z1). Coptocatus oblongulus, Cryphocricinae: (z2) Cryphocricos hungerfordi. Laccocorinae: (z3) Laccocoris hoogstraali, Naucorinae: (z4) Naucoris maculatus. The same scale bar has been applied for all images (50 μm), bs: base of the apical plate, en: tip of the apical plate.