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FIGURES 2–5 in The discovery of progenetic Allocreadium neotenicum Peters, 1957 (Digenea: Allocreadiidae) in water beetles (Coleoptera: Dytiscidae) in Great Britain

FIGURES 2–5. Allocreadium neotenicum (Peters, 1957) 2, 3. ex Hydroporus rufifrons. 2. Ventral view, uterus in outline. 3. Terminal genitalia. Abbreviations: cs, cirrus-sac; ed, ejaculatory duct; ga, genital atrium; gp, genital pore; os, outline of oral sucker; mt, metraterm; pgc, prostatic gland cell; sv, seminal vesicle; vs, outline of ventral sucker. 4, 5. ex Agabus melanarius. 4. Proximal female genitalia. Abbreviations: at, outline of anterior testis; ca, caecum, Lc, opening of Laurer's canal; ov, ovary; sr, seminal receptacle; vs, outline of ventral sucker. 5. Ventral view of immature specimen showing extent of excretory vesicle. Abbreviations: cs, outline of cirrus-sac; es, eyespot; ev, excretory vesicle; ov, ovary; ca, caecum; tt, testes. Scale bars: 2, 500μm; 3, 100 μm, 4, 5, 200μm.

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FIGURE 1 in The discovery of progenetic Allocreadium neotenicum Peters, 1957 (Digenea: Allocreadiidae) in water beetles (Coleoptera: Dytiscidae) in Great Britain

FIGURE 1. PhyML analysis tree of 28S rDNA, including bootstrap results (% values) from the maximum likelihood (ML) and maximum parsimony (MP) analyses. The topology of the ML and MP trees was identical.

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.

FIGURE 4 in Description of the male of Sebasthetops omaliniformis Jäch, 1998 — a phylogenetically isolated water beetle from South Africa, with notes on its ecology (Coleoptera, Hydraenidae)

FIGURE 4. Sebasthetops microhabitat in stream at Mont Rochelle, above Franschhoek. 1,100 m. Photo D.T. Bilton.

FIGURE 3. Sebasthetops omaliniformis male. A in Description of the male of Sebasthetops omaliniformis Jäch, 1998 — a phylogenetically isolated water beetle from South Africa, with notes on its ecology (Coleoptera, Hydraenidae)

FIGURE 3. Sebasthetops omaliniformis male. A) front leg; B) protibia; C) mid leg; D) mesotibia; E) hind leg; F) metatibia.

FIGURE 2. Sebasthetops omaliniformis male. A in Description of the male of Sebasthetops omaliniformis Jäch, 1998 — a phylogenetically isolated water beetle from South Africa, with notes on its ecology (Coleoptera, Hydraenidae)

FIGURE 2. Sebasthetops omaliniformis male. A) head; B) labrum; C) aedeagus, vental view; D) aedeagal apex, ventral view; E) aedeagus, lateral view; F) abdominal apex, dorsal view.

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.

FIGURES 21–31 in Morphometry and redescription of Parahelichus granulosus (Delève, 1974) with description of P. pseudogranulosus, a new cryptic species of Long-toed Water Beetles (Coleoptera: Dryopidae) from Indochinese peninsula, and proposal of a new synonym for Praehelichus sericatus (Waterhouse, 1881) from China

FIGURES 21–31. Parahelichus pseudogranulosus sp. nov., male; (21‒23, 26–31) aedeagus, penis and parameres in lateral, ventral and dorsal view; (21, 26, 27) a male from the locality Mae Hong Son, Ban Si Lang, Thailand; (22, 28, 29) a male from the Bolikhamxai province, Laos; (23, 30, 31) a male from the Khammouan province, Ban Khoun Ngeun env., Laos; (24) male sternite VIII, ventral view; (25) male sternite IX, ventral view. Scale 0.1 mm.

FIGURE 32 in Morphometry and redescription of Parahelichus granulosus (Delève, 1974) with description of P. pseudogranulosus, a new cryptic species of Long-toed Water Beetles (Coleoptera: Dryopidae) from Indochinese peninsula, and proposal of a new synonym for Praehelichus sericatus (Waterhouse, 1881) from China

FIGURE 32. Geographical distribution of Parahelichus granulosus (black squares) and P. pseudogranulosus sp. nov. (black circles).

FIGURES 17–20 in Morphometry and redescription of Parahelichus granulosus (Delève, 1974) with description of P. pseudogranulosus, a new cryptic species of Long-toed Water Beetles (Coleoptera: Dryopidae) from Indochinese peninsula, and proposal of a new synonym for Praehelichus sericatus (Waterhouse, 1881) from China

FIGURES 17–20. Parahelichus granulosus; (17‒18) female antennal club: (17) ventral view, (18) dorsal view, scale 0.1 mm; (19) abdomen of a male, ventral view; (20) abdomen of a female, ventral view; scale 1 mm.

FIGURES 14–16 in Morphometry and redescription of Parahelichus granulosus (Delève, 1974) with description of P. pseudogranulosus, a new cryptic species of Long-toed Water Beetles (Coleoptera: Dryopidae) from Indochinese peninsula, and proposal of a new synonym for Praehelichus sericatus (Waterhouse, 1881) from China

FIGURES 14–16. Parahelichus granulosus, female; (14‒15) ovipositor, lateral view: (14) ovipositor of a specimen from the locality Louang Namtha, Laos, (15) a specimen from the locality Sa Pa (Lao Cai), Vietnam; (16) female sternite VIII, ventral view. Scale 0.1 mm.

FIGURES 3–13 in Morphometry and redescription of Parahelichus granulosus (Delève, 1974) with description of P. pseudogranulosus, a new cryptic species of Long-toed Water Beetles (Coleoptera: Dryopidae) from Indochinese peninsula, and proposal of a new synonym for Praehelichus sericatus (Waterhouse, 1881) from China

FIGURES 3–13. Parahelichus granulosus, male; (3–5, 8–13) aedeagus, penis and parameres in lateral, ventral and dorsal view; figures show differences in proportions between parameres and phallobase; (6) male sternite VIII, ventral view; (7) male sternite IX, ventral view. Scale 0.1 mm.

FIGURES 1, 2 in Revision of the Neotropical burrowing water beetle genus Liocanthydrus Guignot (Coleoptera: Noteridae: Noterinae: Noterini) with the description of two new species

FIGURES 1, 2. Diagnostic characters of Liocanthydrus: 1) L. bicolor, prosternum, metasternum and metacoxae, ventral aspect; 1a) prosternal process; 2) L. nanops sp. n., metaleg, anterior aspect; 2a) series of setae on anteroapical angle of metafemur; 2b) posterior metatibial spur.

FIGURES 16–22 in Revision of the Neotropical burrowing water beetle genus Liocanthydrus Guignot (Coleoptera: Noteridae: Noterinae: Noterini) with the description of two new species

FIGURES 16–22. Aedeagi of Liocanthydrus species. a) median lobe, right lateral aspect; b) median lobe, dorsal aspect; c) median lobe, left lateral aspect; d) left lateral lobe, right lateral aspect; e) right lateral lobe, left lateral aspect: 16) L. angustus; 17) L. uniformis; 18) L. bicolor; 19) L. armulatus sp. n.; 20) L. clayae; 21) L. nanops sp. n.; 22) L. octoguttatus. Scale bars = 0.2 mm. Notes: Terminology follows K.B. Miller & Nilsson (2003). Illustrations of lateral lobes depict medial (inner) surfaces.

FIGURES 10–15 in Revision of the Neotropical burrowing water beetle genus Liocanthydrus Guignot (Coleoptera: Noteridae: Noterinae: Noterini) with the description of two new species

FIGURES 10–15. Liocanthydrus species, lateral aspect: 10) L. angustus; 11) L. uniformis; 12) L. bicolor; 13) L. armulatus sp. n.; 14) L. clayae; 15) L. nanops sp. n. Scale bar = 1.0 mm.

FIGURES 3–9 in Revision of the Neotropical burrowing water beetle genus Liocanthydrus Guignot (Coleoptera: Noteridae: Noterinae: Noterini) with the description of two new species

FIGURES 3–9. Liocanthydrus species, dorsal habitus: 3) L. angustus; 4) L. uniformis; 5) L. bicolor; 6) L. armulatus sp. n.; 7) L. clayae; 8) L. nanops sp. n.; 9) L. octoguttatus (illustration). Scale bar = 1.0 mm.