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FIGURES 1–6 in Description of immatures of the genus Tropisternus Solier, subgenus Pristoternus Orchymont (Coleoptera: Hydrophilidae), with emphasis on the chaetotaxy and morphometry of larval forms

FIGURES 1–6. Egg cases and larva of Tropisternus. 1, T. latus, egg case with mast; 2, T. latus, egg case without mast; 3, T. ovalis, egg case with larva emerging; 4, T. laevis, third instar larva, anterior aspect in dorsal view; 5, T. laevis, egg case showing the globular mast; 6, T. laevis, floating egg case as found in nature. Scale bars = 5 mm for figs. 1, 2, 5 and 6; 2 mm for fig. 3; 1 mm for fig. 4.

FIGURES 32–38. Tropisternus laevis, first instar larva. 32 in Description of immatures of the genus Tropisternus Solier, subgenus Pristoternus Orchymont (Coleoptera: Hydrophilidae), with emphasis on the chaetotaxy and morphometry of larval forms

FIGURES 32–38. Tropisternus laevis, first instar larva. 32, Head capsule, dorsal view; 33, Head capsule, ventral view; 34, Frontoclypeus, dorsal view; 35, Labium, dorsal view; 36, Labium, ventral view; 37, Left mandible, dorsal view; 38, Right mandible, dorsal view. Scale bars = 0.1 mm.

FIGURES 18–21. Tropisternus pupae. 18, T in Description of immatures of the genus Tropisternus Solier, subgenus Pristoternus Orchymont (Coleoptera: Hydrophilidae), with emphasis on the chaetotaxy and morphometry of larval forms

FIGURES 18–21. Tropisternus pupae. 18, T. latus, habitus, dorsal view; 19, T. latus, habitus, ventral view; 20, T. ovalis, habitus, dorsal view; 21, T. ovalis, habitus, ventral view. Scale bars = 1 mm.

FIGURES 29–31. Tropisternus ovalis, first instar larva. 29 in Description of immatures of the genus Tropisternus Solier, subgenus Pristoternus Orchymont (Coleoptera: Hydrophilidae), with emphasis on the chaetotaxy and morphometry of larval forms

FIGURES 29–31. Tropisternus ovalis, first instar larva. 29, Left antenna, dorsal view; 30, Left maxilla, dorsal view; 31, Right maxilla, ventral view. Scale bars = 0.1 mm.

FIGURES 13–17. Tropisternus latus, first instar larva. 13 in Description of immatures of the genus Tropisternus Solier, subgenus Pristoternus Orchymont (Coleoptera: Hydrophilidae), with emphasis on the chaetotaxy and morphometry of larval forms

FIGURES 13–17. Tropisternus latus, first instar larva. 13, Left antenna, dorsal view; 14, Left maxilla, dorsal view; 15, Right maxilla, ventral view; 16, Left mandible, dorsal view; 17, Right mandible, dorsal view. Scale bars = 0.1 mm.

FIGURES 22–28. Tropisternus ovalis, first instar larva. 22 in Description of immatures of the genus Tropisternus Solier, subgenus Pristoternus Orchymont (Coleoptera: Hydrophilidae), with emphasis on the chaetotaxy and morphometry of larval forms

FIGURES 22–28. Tropisternus ovalis, first instar larva. 22, Head capsule, dorsal view; 23, Head capsule, ventral view; 24, Frontoclypeus, dorsal view; 25, Labium, dorsal view; 26, Labium, ventral view; 27, Left mandible, dorsal view; 28, Right mandible, dorsal view. Scale bars = 0.1 mm.

FIGURES 7–12. Tropisternus latus, first instar larva. 7 in Description of immatures of the genus Tropisternus Solier, subgenus Pristoternus Orchymont (Coleoptera: Hydrophilidae), with emphasis on the chaetotaxy and morphometry of larval forms

FIGURES 7–12. Tropisternus latus, first instar larva. 7, Head capsule, dorsal view; 8, Head capsule, ventral view; 9, Head capsule, right lateral view; 10, Labium, dorsal view; 11, Labium, ventral view; 12, Frontoclypeus, dorsal view. Scale bars = 0.1 mm.

FIGURES 39–41. Tropisternus laevis, first instar larva. 39 in Description of immatures of the genus Tropisternus Solier, subgenus Pristoternus Orchymont (Coleoptera: Hydrophilidae), with emphasis on the chaetotaxy and morphometry of larval forms

FIGURES 39–41. Tropisternus laevis, first instar larva. 39, Left antenna, dorsal view; 40, Left maxilla, dorsal view; 41, Right maxilla, ventral view. Scale bars = 0.1 mm.

FIGURES 8–10 in Description of immatures of Berosus decolor Knisch, 1924 (Coleoptera: Hydrophilidae: Berosini), with emphasis on chaetotaxy and morphometry

FIGURES 8–10. Berosus decolor, first-instar larva: (8) left antenna, dorsal view; (9) left maxilla, dorsal view; (10) right maxilla, ventral view. Scale bars = 0.05 mm.

FIGURES 5–7 in Description of immatures of Berosus decolor Knisch, 1924 (Coleoptera: Hydrophilidae: Berosini), with emphasis on chaetotaxy and morphometry

FIGURES 5–7. Berosus decolor, first-instar larva: (5) labroclypeus, dorsal view; (6) left mandible, dorsal view; (7) right mandible, dorsal view. Scale bars = 0.10 mm.

FIGURES 3–4 in Description of immatures of Berosus decolor Knisch, 1924 (Coleoptera: Hydrophilidae: Berosini), with emphasis on chaetotaxy and morphometry

FIGURES 3–4. Berosus decolor, first-instar larva: (3) head capsule, dorsal view; (4) head capsule, ventral view. Scale bars = 0.10 mm.

FIGURES 13–14 in Description of immatures of Berosus decolor Knisch, 1924 (Coleoptera: Hydrophilidae: Berosini), with emphasis on chaetotaxy and morphometry

FIGURES 13–14. Berosus decolor, first-instar larva: (13) left prothoracic leg, anterior view; (14) right prothoracic leg, posterior view. Scale bar = 0.10 mm.

FIGURES 11–12 in Description of immatures of Berosus decolor Knisch, 1924 (Coleoptera: Hydrophilidae: Berosini), with emphasis on chaetotaxy and morphometry

FIGURES 11–12. Berosus decolor, first-instar larva: (11) labium, dorsal view; (12) labium, ventral view. Scale bar =0.05 mm.

FIGURES 1–2 in Description of immatures of Berosus decolor Knisch, 1924 (Coleoptera: Hydrophilidae: Berosini), with emphasis on chaetotaxy and morphometry

FIGURES 1–2. Berosus decolor, (1) egg case, dorsal view, built over leaves and stems of Elodea. sp; (2) first-instar larva: habitus, dorsal view. Scale bars = 1.00 mm (Fig. 1) and 0.50 mm (Fig. 2).

FIGURES 7–14 in A new aberrant species of Nipponocercyon from the mountains of southeastern China (Coleoptera: Hydrophilidae: Sphaeridiinae)

FIGURES 7–14. Morpology of Nipponocercyon satoi sp. nov., SEM micrographs of female paratypes. 7: head in dorsal view; 8: head in ventral view; 9: anterior tibia, dorsal view; 10: antenna in ventral view; 11: prosternum; 12: prothorax and anterior leg in ventral view; 13: whole body in lateral view; 14: detail of the punctation of the pronotum. Abbreviations: ang: antennal grooves of prothorax; aps: antennal peg-like sensilla; prt: the free prosternal "tooth" on prosternum-hypomeron border; pfd: profemoral depression.

FIGURES 15–20 in A new aberrant species of Nipponocercyon from the mountains of southeastern China (Coleoptera: Hydrophilidae: Sphaeridiinae)

FIGURES 15–20. Morpology of Nipponocercyon satoi sp. nov., SEM micrographs of female paratypes. 15: meso- and metathorax in ventral view, detail; 16: detail of mesoventral plate and metaventral process; 17: meso- and metathorax in ventral view, general view; 18: posterior leg, ventral view; 19: elytron, lateral view; 20: detail of basal portion of elytron and scutellat shield. Abbreviations: grp: grooves for reception of procoxae; mtr: ridge of the metaventral process.

FIGURES 1–6 in A new aberrant species of Nipponocercyon from the mountains of southeastern China (Coleoptera: Hydrophilidae: Sphaeridiinae)

FIGURES 1–6. Nipponocercyon satoi sp. nov. 1–4: general habitus of the female paratype (1: dorsal view, 2: ventral view, 3: lateral view, 4: frontal view). 5–6: aedeagus of the holotype (5: phallobase and parameres, 6: median lobe).

FIGURE 21 in A new aberrant species of Nipponocercyon from the mountains of southeastern China (Coleoptera: Hydrophilidae: Sphaeridiinae)

FIGURE 21. Distribution and general habitus of known species of Nipponocercyon. Habitus photos shown to scale. Figure of N. sichuanicus adopted from Fikáček et al. (2012), that of N. shibatai from Hoshina & Fikáček (2010).

FIGURES 17–20 in Notes on the Australian Anacaenini (Coleoptera: Hydrophilidae): description of male of Phelea breviceps Hansen and unravelling the identity of Crenitis neogallica Gentili

FIGURES 17–20. Morphology of Phelea breviceps Hansen, 1999. 17: detail of mesothorax in ventral view, 18: epipleuron at level of meso-metathorax, 19: general view of meso- and metathorax in ventral view, 20: abdominal ventrites.

FIGURES 1–6 in Notes on the Australian Anacaenini (Coleoptera: Hydrophilidae): description of male of Phelea breviceps Hansen and unravelling the identity of Crenitis neogallica Gentili

FIGURES 1–6. Morphology and distribution of Phelea breviceps Hansen, 1999. 1–2: habitus in dorsal and lateral view, 3: ventral morphology, 4: aedeagus, 5: detail of head in frontal view, 6: known distribution in Tasmania.