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FIGURES 18–23 in Description of three new species of Crenitis Bedel from China, with additional faunistic records for the genus (Coleoptera: Hydrophilidae: Chaetarthriinae)

FIGURES 18–23. Crenitis obovata sp. nov. 18–21: Habitus (18: dorsal view, 19: ventral view, 20: lateral view, 21: anterior view); 22: mesoventrite, ventral view; 23: aedeagus, dorsal view. 18–20, 22–23: Holotype.

FIGURES 10–17 in Description of three new species of Crenitis Bedel from China, with additional faunistic records for the genus (Coleoptera: Hydrophilidae: Chaetarthriinae)

FIGURES 10–17. Crenitis lianggeqiui sp. nov. 10–12: Habitus (10: dorsal view, 11: ventral view, 12: lateral view); 13: head and pronotum, dorsal view; 14: head and prosternum, ventral view; 15: meso- and metaventrite, ventral view; 16: abdomen, ventral view; 17: pronotum, lateral view.

FIGURES 1–9 in Description of three new species of Crenitis Bedel from China, with additional faunistic records for the genus (Coleoptera: Hydrophilidae: Chaetarthriinae)

FIGURES 1–9. Crenitis aduncata sp. nov. 1–3: Habitus (1: dorsal view, 2: ventral view, 3: lateral view); 4: head, dorsal view; 5: pronotum, dorsal view; 6: pronotum, lateral view; 7: head and prosternum, ventral view; 8: abdomen, ventral view; 9: meso- and metaventrite, ventral view.

FIGURES 56 – 62. SEM photographs. 56 – 59 in Description of three new species of Crenitis Bedel from China, with additional faunistic records for the genus (Coleoptera: Hydrophilidae: Chaetarthriinae)

FIGURES 56 – 62. SEM photographs. 56 – 59: Crenitis aduncata sp. nov., ventral view (56: labrum and mentum, 57: metaventrite, 58: maxillary palpus, 59: metafemur); 60 – 62. C. lianggeqiui sp. nov., ventral view (60: metafemur, 61: mentum, 62: antenna and maxillary palpus).

FIGURES 20–26 in The genus Laccobius in China: new species and new records (Coleoptera: Hydrophilidae)

FIGURES 20–26. Laccobius hammondi (20–25) and L.oscillans (26). 20–21: general habitus (20: dorsal view, 21: lateral view). 22–24: aedegus of L. hammondi (22: dorsal view, 23: lateral view, 24 ventral view). 25–26: aedeagus with open parameres showing the shape of the median lobe (25: L. hammondi, 26: L.oscillans from Japan, Sapporo env., Kimotetsu).

FIGURES 1–7 in The genus Laccobius in China: new species and new records (Coleoptera: Hydrophilidae)

FIGURES 1–7. Laccobius (Glyptolaccobius) qinlingensis sp. nov. and its localities. 1–2: general habitus (1: dorsal view; 2: lateral view). 3–5: aedeagus (3: dorsal view; 4: lateral view; 5: ventral view). 6: waterfall at Fengyukou, type locality, site where the specimens were collected is marked by an arrow. 7: M. Balke collecting L. qinlingensis and Aspidytes wrasei at a granite cliff near Huayin village. Photos 6–7 by J. Hájek.

FIGURES 8–16 in The genus Laccobius in China: new species and new records (Coleoptera: Hydrophilidae)

FIGURES 8–16. Laccobius hainanensis sp. nov.sp. nov. (8–13) and L. politus (14–16). 8–9: general habitus (8: dorsal view, 9: lateral view).10–12: aedeagus (10: dorsal view, 11: lateral view, 12: ventral view).13: habitat at the type locality of L. hainanensis. 14–16: aedeagus of L.politus from Yunfeng Shan Mt. in Yunnan (14: dorsal view, 15: lateral view, 16: ventral view).

FIGURE 1 in New species and new records of the hygropetric water beetle genus Oocyclus Sharp from South America (Coleoptera: Hydrophilidae)

FIGURE 1. Habitus photos of Oocyclus spp. A) O. brunneus sp. n. (dorsal and lateral), B) O. maluz sp. n. (dorsal), C) O. miza, sp. n. (dorsal). All specimens are paratypes.

FIGURES 1–4 in Crenitis bicolor sp. n. from the Kamiesberg of South Africa (Coleoptera: Hydrophilidae)

FIGURES 1–4. Morphology and habitat of Crenitis bicolor sp. n. 1) Dorsal habitus. Scale bar = 1 mm, 2) Type locality: South Africa, Northern Cape, Kamiesberg, small stream ca. 5 km W of Witwater above Studer's Pass. Specimens were netted from the pool at the bottom left of the image (photo: D.T. Bilton), 3) Venter, showing pubescence of hind femora. Scale bar = 0.5 mm, 4) Aedeagus. Scale bar = 100 μm.

FIGURES 31–37 in Chimaerocyon gen. nov., a morphologically aberrant myrmecophilous genus of water scavenger beetle (Coleoptera: Hydrophilidae: Sphaeridiinae)

FIGURES 31–37. Phylogenetic position of Chimaerocyon. 31—Bayesian tree based on four genes concatenated (branches with posterior probability values). 32—mapping of relevant tribal-level characters on the tree (full circle = gain, crossed circle = loss). 33–37—diagnostic tribal-level characters illustrated on selected representatives of the Sphaeridiinae. Abbreviations (numbers refer to characters in Fig. 32): angr—antennal groove, comcl—compact antennal club, curt—curved metatibia, elpr—elevated median portion of prosternum, excly—excised lateral portion of clypeus (exposed antennal bases), llob—lateral lobes of clypeus, msuc—male sucker on maxilla, pgr—grooves for reception of procoxae, pros—well-developed prosternum, wepi—wide epipleuron posteriorly.

FIGURES 6–14 in Chimaerocyon gen. nov., a morphologically aberrant myrmecophilous genus of water scavenger beetle (Coleoptera: Hydrophilidae: Sphaeridiinae)

FIGURES 6–14. Morphological details of Chimaerocyon shimadai (6–13) and C. sumatranus (14). 6—ventral view, 7—egg drawn to scale with Fig. 6, 8—aedeagus of the holotype, 9—male sternite 8 of the holotype, 10—male sternite 9, 11—hind wing of the holotype, 12–14—abdominal apex (12—male holotype of C. shimadai, 13—female paratype of C. shimadai, 14— female holotype of C. sumatranus). Abbreviations (numbers refer to characters in Fig. 32): msuc—male suckers on maxilla, elpr—elevated median portion of prosternum, wepi—wide epipleuron posteriorly, shtars—shortened tarsus, abdem— abdominal emargination.

FIGURES 23–30 in Chimaerocyon gen. nov., a morphologically aberrant myrmecophilous genus of water scavenger beetle (Coleoptera: Hydrophilidae: Sphaeridiinae)

FIGURES 23–30. Detailed morphology of Chimaerocyon shimadai (23–26, 28–30) and C. sumatranus (27). 23—meso- and metathorax in ventral view, 24—mesoventrite in lateral view, 26—median portions of meso- and metaventrite in ventral view, 26–27—right elytral apex, 28—metatarsus, 29—metatarsal claws, 30—detail of apical portion of elytral series 1–2.

FIGURES 1–5 in Chimaerocyon gen. nov., a morphologically aberrant myrmecophilous genus of water scavenger beetle (Coleoptera: Hydrophilidae: Sphaeridiinae)

FIGURES 1–5. Habitus of Chimaerocyon species. 1–3—male paratype of Chimaerocyon shimadai (1—dorsal view, 2—lateral view, 3—frontal view). 4–5—holotype of C. sumatranus (4—dorsal view, 5—frontal view).

FIGURES 15–22 in Chimaerocyon gen. nov., a morphologically aberrant myrmecophilous genus of water scavenger beetle (Coleoptera: Hydrophilidae: Sphaeridiinae)

FIGURES 15–22. Detailed morphology of Chimaerocyon shimadai (15–21) and C. sumatranus (22). 15—head in dorsal view, 16—head in ventral view, 17—prothorax and head in ventral view, 18—clypeus in lateral view, 19, 22—mentum, 20— profurca, 21—elevated mesal portion of prosternum. Abbreviations (numbers refer to those used in Fig. 32): cly—clypeus, msuc—male sucker on maxilla.

FIGURE 1 in Laccobius leopardus sp. nov. from the Western Cape of South Africa (Coleoptera: Hydrophilidae)

FIGURE 1. Morphology and habitat of Laccobius species. a) L. leopardus sp. nov. holotype dorsal habitus. b) L. leopardus sp. nov. paratype head and pronotum. c) L. caffer dorsal habitus. d) L. leopardus sp. nov. aedeagus ventral and lateral views. e) L. caffer aedeagus ventral and lateral views. f) L. leopardus sp. nov. type locality: South Africa, Western Cape, Cederberg, Matjies River at Matjiesrivier Reserve ca. 3 km N of Cederberg Oasis (photo: D.T. Bilton). Scale bars a–c = 1 mm; d–e = 500 Μm.

FIGURES 15–23 in Review of the Chinese species of the genus Coelostoma Brullé, 1835 (Coleoptera: Hydrophilidae: Sphaeridiinae)

FIGURES 15–23. Aedeagus of Chinese Coelostoma. 15: C. fallaciosum, 16: C. vitalisi, 17–18: C. vividum (17: specimen from Guangdong: Heishiding; 18: paratype from Sumatra: Bengealis), 19: C. orbiculare, 20: C. bifidum sp. nov., 21: C. turnai (specimen from Hunan), 22: C. hajeki sp. nov., 23: C. hongkongene sp. nov.

FIGURES 32–33 in Review of the Chinese species of the genus Coelostoma Brullé, 1835 (Coleoptera: Hydrophilidae: Sphaeridiinae)

FIGURES 32–33. Aedeagus of Coelostoma stultum. 32: from Guangdong, 33: specimen from Xizang identified as C. sulcatum by Pu (1988).

FIGURES 1–8 in Review of the Chinese species of the genus Coelostoma Brullé, 1835 (Coleoptera: Hydrophilidae: Sphaeridiinae)

FIGURES 1–8. Habitus, morphology and habitats of Chinese Coelostoma. 1–6: Coelostoma bifidum sp. nov. (1–2: habitus in dorsal and lateral views; 3: ventral morphology; 4: specimens hiding in grass root during the day (in Jiangxi: Jinggangshan), 5: active specimen of the surface of wet rock at night (in Guangdong: Heishiding); 6: detail of meso-metaventral elevation). 7: detail of pronotal and elytral punctation of C. hongkongense sp. nov.; 8: punctation of lateral portion of elytra of C. gentilii sp. nov.

FIGURES 9–14 in Review of the Chinese species of the genus Coelostoma Brullé, 1835 (Coleoptera: Hydrophilidae: Sphaeridiinae)

FIGURES 9–14. Characters distinguishing the subgenera of Coelostoma occurring in China. 9–10: subgenus Lachnocoelostoma (C. bifidum sp. nov.); 11–12: subgenus Holocoelostoma (C. stultum); 13–14: subgenus Coelostoma s.str. (C. orbiculare). 9, 11, 13: mesofemur in ventral view; 10, 12, 14: posterior margin of andominal ventrite 5.

FIGURES 24–31 in Review of the Chinese species of the genus Coelostoma Brullé, 1835 (Coleoptera: Hydrophilidae: Sphaeridiinae)

FIGURES 24–31. Aedeagus of Chinese Coelostoma and related species. 24: C. coomani, 25: C. gentilii sp. nov., 26: C. phallicum, 27: C. huangi sp. nov., 28: C. martensi (paratype from Nepal), 29: C. wui, 30: C. vagum, 31: C. horni from southern Yunnan: Xishuangbanna).