Heleocoris undetermined

Polhemus, Dan A. & Polhemus, John T., 2013, Guide To The Aquatic Heteroptera Of Singapore And Peninsular Malaysia. Xi. Infraorder Nepomorpha- Families Naucoridae And Aphelocheiridae, Raffles Bulletin of Zoology 61 (2), pp. 665-686 : 674

KEY TO MALES OF HELEOCORIS SPECIES

occurring in Singapore, Peninsular Malaysia, and adjacent Indochina

1. Small species, body length 8 mm or less ................................. .......................................................... H. montandoni Lundblad

– Larger species, body length exceeding 9 mm ........................2

2. Embolium strongly produced laterally, posterolateral margin cut sharply inward, projecting markedly beyond remaining hemelytral margin ( Fig. 23); apex of male phallotheca bluntly rounded, lacking prominent lobes ( Fig. 28 ) ............ H. strabus Montandon

– Embolium not strongly produced laterally, posterolateral margin merging smoothly and evenly with remaining hemelytral margin; apex of male phallotheca either acute, or bearing prominent projecting lobes ( Figs. 24, 26, 27 )..........................................3

3. Male left paratergite VI bearing a hooked process laterally ( Fig. 34 ); male phallotheca with elongate distal lobe ( Fig. 24 ); Peninsular Malaysia..................... H. malayensis , new species

– Male left paratergite VI bearing a blunt process laterally ( Fig. 35 ); distal lobe of male phallotheca shorter ( Fig. 27 ); Indochina ................................................ H. ovatus Montandon

Figures

Figs. 24–28. Heleocoris species, male phallotheca. 24. Heleocoris malayensis, new species, specimen from Malaysia, Terengganu, Sungai Brang. 25. Heleocoris montandoni Lundblad, specimen from Singapore, Nee Soon swamp forest. 26. Heleocoris nebulosus Montandon, specimen from Indonesia, Bali, Melangit River. 27. Heleocoris ovatus Montandon, specimen from Vietnam, Lam Dong Prov., Pongour Falls, CL 3091. 28. Heleocoris strabus Montandon, specimen from Thailand, Chiang Mai Prov., Huay Hia Creek, CL 2198.

Figs. 34, 35. Heleocoris species, male left abdominal paratergites. 34. Heleocoris malayensis, new species, specimen from Malaysia, Terengganu, Sungai Brang. 35. Heleocoris ovatus Montandon, specimen from Vietnam, Lam Dong Prov., Pongour Falls.