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Figs. 25–41 in Guide To The Aquatic Heteroptera Of Singapore And Peninsular Malaysia: Vii. Family Helotrephidae

Figs. 25–41. Key characters of species of Limnotrephini. Female terminalia in ventral, male genitalia in lateral (left) aspect. (25, 29, 33) Subgenital plate of female, (34, 38) first valvulae of female, (26, 30, 35, 39) aedeagus of male, (27, 31, 36, 40) left paramere of male, (28, 32, 37, 41) right paramere of male. 25–28, Distotrephes zetteli, 29–32, Tiphotrephes indicus, 33–37, Idiotrephes chinai, 38–41, Idiotrephes asiaticus. Redrawn from Papá ek & Zettel, 2000, 2003 and Papá ek & Kovac, 2001b, respectively; some parts slightly modified.

Figs. 40–76 in Guide To The Aquatic Heteroptera Of Singapore And Peninsular Malaysia: Vii. Family Helotrephidae

Figs. 40–76. Key characters of species of Helotrephini. (40, 41) Pronotal plate (pnp) and genal plate (gp), ventrolateral aspect, (44–47, 60–63) Subgenital plate of female, ventral aspect, pilosity omitted in Figs. 44, 60–63) male genitalia in lateral (left) aspect: (48, 51, 54, 57, 64, 65, 68, 71, 74) aedeagus of male, (49, 52, 55, 58, 66, 69, 72, 75) left paramere of male, (50, 53, 56, 59, 67, 70, 73, 76) right paramere of male. 42, 44, 48 – 50, Helotrephes australis, 45, 51–53, Helotrephes affinis, 43, 46, 54–56, Helotrephes flaviceps, 47, 57–59, Helotrephes rompinensis, 60, 65–67, Hydrotrephes sitesi, 61, 68–70, Hydrotrephes maculatus (redrawn from Papá ek & Kovac, 2001a; slightly modified), 62, 74–76, Hydrotrephes benomensis, 63, 71–73, Hydrotrephes langkawicus, 64, Hydrotrephes mixtus.

Figs. 12–24 in Guide To The Aquatic Heteroptera Of Singapore And Peninsular Malaysia: Vii. Family Helotrephidae

Figs. 12–24. Key characters of helotrephid genera. 12–14, Hemielytron in situ, dorsolateral aspect; cla = clavus, cls = claval suture, emb = embolium, pse = pseudendocorium, psm = pseudomembrane. (12) Platytrephes sitesi, hindwing-brachypterous morph, (13) Helotrephes australis, hindwing-brachypterous morph, and (14) Helotrephes australis, macropterous morph. 15–19, Cephalonotum (pnp = pronotal plate), lateral aspect, of (15) Helotrephes australis, (16) Distotrephes zetteli, hindwing-brachypterous morph, (17) Distotrephes pavelstysi Zettel, 1999, macropterous morph, (18) Tiphotrephes indicus, (19) Idiotrephes chinai. 20–23, Ventromedial carinae of thoracic and abdominal sternites, lateral aspect; prs – prosternum, mss – mesosternum, mts – metasternum, 2, 3, 4 etc. abdominal sternites 2, 3, 4 etc. (20) Helotrephes australis, (21) Ascetotrephes edmundsorum, (22) Hydrotrephes mixtus, (23) Hydrotrephes belomensis. 24, Metasternal carinae in Distotrephes zetteli, ventral aspect. Images not to scale.

Figs. 1–11. 1–8 in Guide To The Aquatic Heteroptera Of Singapore And Peninsular Malaysia: Vii. Family Helotrephidae

Figs. 1–11. 1–8, Habitus, dorsal aspect; 9–11, frontal aspect. (1) Fischerotrephes jaechi; (2) Platytrephes sitesi; (3, 9) Helotrephes rompinensis; (4, 11) Hydrotrephes benomensis; (5, 10) Ascetotrephes edmundsorum; (6) Idiotrephes chinai; (7) Distotrephes zetteli; (8) Tiphotrephes indicus. (© NHMW Hemiptera Image Collection; published with permission). Images not to scale.

Fig. 10–13. Nereivelia polhemorum, new species. 10 in Guide To The Aquatic Heteroptera Of Singapore And Peninsular Malaysia. 6. Mesoveliidae, With Description Of A New Nereivelia Species From Singapore

Fig. 10–13. Nereivelia polhemorum, new species. 10. apterous male, dorsal view; 11. lateroventral view of head showing the longitudinal carina and the raised ridged plate; 12. dorsal view of abdomen and thorax, showing disk-like plates (D) and the scent orifice (S); 13. surface of thorax showing disc-like plates.

Fig. 6–9 in Guide To The Aquatic Heteroptera Of Singapore And Peninsular Malaysia. 6. Mesoveliidae, With Description Of A New Nereivelia Species From Singapore

Fig. 6–9. Nereivelia murphyi Polhemus & Polhemus (after Polhemus & Polhemus, 1989). 6. apterous male, dorsal view; 7. apterous female, dorsal view; 8–9. male abdominal terminalia; 8. lateral view; 9. dorsal view.

Fig. 1–2. Mesovelia horvathi Lundblad. 1 in Guide To The Aquatic Heteroptera Of Singapore And Peninsular Malaysia. 6. Mesoveliidae, With Description Of A New Nereivelia Species From Singapore

Fig. 1–2. Mesovelia horvathi Lundblad. 1. apterous male, dorsal view; 2. apterous male, ventral view.

Fig. 14–16. Nereivelia polhemorum, new species. 14 in Guide To The Aquatic Heteroptera Of Singapore And Peninsular Malaysia. 6. Mesoveliidae, With Description Of A New Nereivelia Species From Singapore

Fig. 14–16. Nereivelia polhemorum, new species. 14. male abdominal terminalia, lateral view showing paramere (P), proctiger (Pr), pygophore (Py); 15. Female abdominal terminalia, lateral view showing gonocoxa 1 (Gx1), gonocoxa 2 (Gx2), gonoplac (Gp), proctiger (Pr) and gonapophyses (Go); 16. Ovipositor. Scale bars: 0.1 mm.

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Fig. 1 in Aquatic Heteroptera Of Great Rivers Of The Ukrainian Steppe Zone And Seasonal Changes Of Abundance And Biomass

Fig. 1. Seasonal changes of abundance (A, ind./m2) and biomass (B, mg/m2) of water bugs in the Dniester and associated water bodies.

Fig. 6 in The aquatic Heteroptera (Hemiptera) of marshes in the Florida Everglades

Fig. 6. Illustrations of the color patterns on the head and thorax of the 2 adult female individuals of Trepobates floridensis found in Everglades marsh samples. (a, b) are dorsal illustrations and (c, d) are lateral illustrations; (a, c) are of the individual from the Panhandle region on 5 Jul 2017; (b, d) are of the individual from northeastern Everglades National Park on 19 Sep 2016. Corresponding photographs are in the supplements (Figs. S5, S6).

Fig. 3 in The aquatic Heteroptera (Hemiptera) of marshes in the Florida Everglades

Fig. 3. Adult density (number of individuals per m2) maps of the 2 species of Belostomatinae, (a, b) Abedus immaculatus and (c, d) Belostoma lutarium, from Modified Water Delivery (lef column) during water yr 2017 and Comprehensive Everglades Restoration Plan samples (right column) during 2016 and 2017. Each point represents 1 sample site (Modified Water Deliveries) or primary sampling unit (Comprehensive Everglades Restoration Plan). Regions are labeled in (a). Regions: ENP = Everglades National Park; LOX = Loxahatchee National Wildlife Refuge; PHD = Everglades National Park panhandle; SRS = Shark River Slough; TSL = Taylor Slough; UTS = Upper Taylor Slough; WCA = Water Conservation Areas.

Fig. 5 in The aquatic Heteroptera (Hemiptera) of marshes in the Florida Everglades

Fig. 5. Density maps (number of individuals per m2) of Negerris hesione in (a) Modified Water Delivery during water yr 2017 and (b) Comprehensive Everglades Restoration Plan samples during 2016 and 2017; (c) density (number of individuals per m2) of N. hesione by region in Modified Water Deliveries samples by sampling period. Sampling periods represented encompass all of water yr 2017 from the start of the wet season (Jul 2016; period 1) to the end at the start of the dry (Apr 2017; period 5); see Table 1. Regions: LOX = Loxahatchee National Wildlife Refuge; PHD = Everglades National Park panhandle; SRS = Shark River Slough; TSL = Taylor Slough; WCA = Water Conservation Areas. Shaded area represents the wet season; unshaded area is the dry season.

Fig. 2 in The aquatic Heteroptera (Hemiptera) of marshes in the Florida Everglades

Fig. 2. Density (number of individuals per m2) of Pelocoris balius (lef column) and Pelocoris femoratus (right column) by region in Modified Water Delivery samples by sampling period and life stage: (a, b) adult females; (c, d) adult males; (e, f) nymphs. Sampling periods represented encompass all of water yr 2017 from the start of the wet season (Jul 2016; period 1) to the end at the start of the dry (Apr 2017; period 5); see Table 1. Regions: PHD = Everglades National Park panhandle; SRS = Shark River Slough; TSL = Taylor Slough; WCA = Water Conservation Area 3. Shaded areas represent the wet season; unshaded areas are the dry season.

Fig. 1 in The aquatic Heteroptera (Hemiptera) of marshes in the Florida Everglades

Fig. 1. Adult density (number of individuals per m2) maps of the 3 species of Pelocoris by project. The top row is Modified Water Delivery samples during water yr 2017, whereas the bottom row is Comprehensive Everglades Restoration Plan samples during 2016 and 2017. Each point represents 1 sample site (Modified Water Deliveries) or primary sampling unit (Comprehensive Everglades Restoration Plan). Regions are labeled in (a). No P. carolinensis were collected in Modified Water Deliveries samples. Regions: ENP = Everglades National Park; LOX = Loxahatchee National Wildlife Refuge; PHD = Everglades National Park panhandle; SRS = Shark River Slough; TSL = Taylor Slough; UTS = Upper Taylor Slough; WCA = Water Conservation Areas.

Fig. 4 in The aquatic Heteroptera (Hemiptera) of marshes in the Florida Everglades

Fig. 4. Density (number of individuals per m2) of species of Belostomatinae by region in Modified Water Deliveries samples by sampling period: (a) Abedus immaculatus, (b) Belostoma lutarium, (c) combined nymphs of both species. Sampling periods represented encompass all of water yr 2017 from the start of the wet season (Jul 2016; period 1) to the end at the start of the dry season (Apr 2017; period 5); see Table 1. Regions: PHD = Everglades National Park panhandle; SRS = Shark River Slough; TSL = Taylor Slough; WCA = Water Conservation Area 3. Shaded areas represent the wet season; unshaded areas are the dry season.

Figs. 60-67 in Guide To The Aquatic Heteroptera Of Singapore And Peninsular Malaysia. V. Hydrometridae

Figs. 60-67: 60-64: Hydrometra lineata Eschscholtz; 60. Apex of head, dorsal view showing anteclypeus; 61. Male terminal abdomen, lateral view; 62. Male terminal abdomen, ventral view; 63. Female terminal abdomen, dorsal view; 64. Female terminal abdomen, lateral view. 65-67: Hydrometra longicapitis Torre-Bueno; 65. Apex of head, dorsal view showing anteclypeus; 66. Male terminal abdomen, lateral view; 67. Male terminal abdomen, ventral view.

Figs. 44-51 in Guide To The Aquatic Heteroptera Of Singapore And Peninsular Malaysia. V. Hydrometridae

Figs. 44-51: 44-46: Hydrometra heoki heoki Zettel & Yang; 44. Male terminal abdomen, lateral view; 45. Male terminal abdomen, ventral view; 46. Female terminal abdomen, lateral view; 47. Hydrometra heoki paya Zettel & Yang, male termainal abdomen, ventral view; 48-51: Hydrometra jaczewskii Lundblad. 48. Apex of head, dorsal view showing anteclypeus; 49. Male terminal abdomen, lateral view; 50. Male, cluster of setae on sternite 7; 51. Female terminal abdomen, lateral view.

Figs. 20-27 in Guide To The Aquatic Heteroptera Of Singapore And Peninsular Malaysia. V. Hydrometridae

Figs. 20-27: 20-24: Hydrometra brevitarsus Zettel & Yang; 20. Apex of head, dorsal view showing anteclypeus; 21. Male terminal abdomen, lateral view; 22. Male terminal abdomen, ventral view; 23. Female terminal abdomen, dorsal view; 24. Female terminal abdomen, lateral view. 25-27: Hydrometra carinata Polhemus & Polhemus; 25. Apex of head, dorsal view showing anteclypeus; 26. Head, lateral view (AC, anteclypeus; Gl, gular lobe; MXP, maxillary plate); 27. Female terminal abdomen, lateral view.

Figs. 28-35 in Guide To The Aquatic Heteroptera Of Singapore And Peninsular Malaysia. V. Hydrometridae

Figs. 28-35: 28-29: Hydrometra carinata Polhemus & Polhemus, male terminal abdomen; 28. lateral view; 29. cluster of spines on sternite 7. 30-33: Hydrometra cracens Polhemus & Polhemus; 30. Apex of head, dorsal view showing anteclypeus; 31. Male terminal abdomen, lateral view; 32. Male terminal abdomen, ventral view; 33. Female terminal abdomen, lateral view. 34-35: Hydrometra gilloglyi Polhemus & Polhemus; 34. Apex of head, dorsal view showing anteclypeus; 35. Male terminal abdomen, lateral view.

Figs. 5-9 in Guide To The Aquatic Heteroptera Of Singapore And Peninsular Malaysia. V. Hydrometridae

Figs. 5-9: Hydrometra chaweewanae Sites & Polhemus. 5. Apex of head, dorsal view showing anteclypeus; 6. Male terminal abdomen, ventral view; 7. Male terminal abdomen, lateral view; 8. Female terminal abdomen, dorsal view; 9. Female terminal abdomen, lateral view. Hydrometra okinawana Drake: 10. female terminal abdomen, dorsal view; 11. female terminal abdomen, lateral view.