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Fig. 3 in Morphology of immature stages of Helophorus (Gephelophorus) auriculatus (Coleoptera, Helophoridae)

Fig. 3. First instar larva of Helophorus auriculatus Sharp, 1884. Anterior margin of head capsule, dorsal view.

Fig. 4. South African Helophorus, SEMs.A, C, E & G – H. aethiops J in Out of the Palaearctic: the Helophorus water beetles of the Afrotropical Region (Coleoptera: Helophoridae)

Fig. 4. South African Helophorus, SEMs.A, C, E & G – H. aethiops J. Balfour-Browne, 1954, Kokstad, South Africa; B, D, F & H – H. brumopluvialis sp. nov., Hopefield, South Africa.A–B – head detail; C–D – pronota; E–F – pronotal detail, median groove to far left; G–H – left elytral striation close to apex.

Fig. 3. Afrotropical Helophorus, pronota. A – H in Out of the Palaearctic: the Helophorus water beetles of the Afrotropical Region (Coleoptera: Helophoridae)

Fig. 3. Afrotropical Helophorus, pronota. A – H. aethiopicus Régimbart, 1907, lectotype; B – H. aethiops J. Balfour-Browne, 1954, holotype; C – H. cooperi Orchymont, 1947, holotype; D – H. brumopluvialis sp. nov., holotype; E – H. nyandaruaensis sp. nov., holotype; F – H. simiensis sp. nov., holotype.

Fig. 2. Afrotropical Helophorus, aedeagi. A – H in Out of the Palaearctic: the Helophorus water beetles of the Afrotropical Region (Coleoptera: Helophoridae)

Fig. 2. Afrotropical Helophorus, aedeagi. A – H. aethiopicus Régimbart, 1907, lectotype; B – H. aethiopicus, paralectotype; C – H. aethiops J. Balfour-Browne, 1954, holotype; D–F – H. aethiops J. Balfour-Browne, 1954, Kokstad, South Africa; G – H. cooperi Orchymont, 1947, holotype; H – H. brumopluvialis sp. nov., holotype; I–J – H. brumopluvialis sp. nov., Hopefield, South Africa; K – H. nyandaruaensis sp. nov., holotype; L – H. simiensis sp. nov., holotype. Scale bar = 100 μm.

Fig. 1. Afrotropical Helophorus, habitus. A – H in Out of the Palaearctic: the Helophorus water beetles of the Afrotropical Region (Coleoptera: Helophoridae)

Fig. 1. Afrotropical Helophorus, habitus. A – H. aethiopicus Régimbart, 1907, lectotype; B – H. aethiops J. Balfour-Browne, 1954, holotype; C – H. aethiops J. Balfour-Browne, 1954, Kokstad, South Africa; D – H. cooperi Orchymont, 1947, holotype; E – H. brumopluvialis sp. nov., holotype; F – H. nyandaruaensis sp. nov., holotype; G – H. simiensis sp. nov., holotype. Scale bar = 1 mm.

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Figs 1–3. Helophorus auricollis. 1 in New records of water beetles (Coleoptera: Helophoridae, Hydrophilidae, Hydraenidae) from Commander Islands

Figs 1–3. Helophorus auricollis. 1 – male genitalia, dorsal view; 2, 3 – habitat on the Bering Island (floodplain of Buyan River).

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Fig. 8–10 in New records of water beetles (Coleoptera: Helophoridae, Hydrophilidae, Hydraenidae) from Commander Islands

Fig. 8–10. Habitat of Ochthebius yoshitomii on the Commander Islands. 8 – Toporkov Island (coast of Pacific Ocean); 9, 10 – Bering Island (Vkhodnoy Rif cape, coast of Pacific Ocean).

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Linked collectors and determiners for: Helophoridae, Georissidae, Hydrophilidae, Hydraenidae and Elmidae of Kunashir Island and the Lesser Kuriles.

Natural history specimen data linked to collectors and determiners held within, "Helophoridae, Georissidae, Hydrophilidae, Hydraenidae and Elmidae of Kunashir Island and the Lesser Kuriles". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/a8207151-95ff-457a-ada6-03438de183b6">https://bionomia.net/dataset/a8207151-95ff-457a-ada6-03438de183b6</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/a8207151-95ff-457a-ada6-03438de183b6">https://gbif.org/dataset/a8207151-95ff-457a-ada6-03438de183b6</a>. Formatted as a Frictionless Data package.

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Fig. 5 in Out of the Palaearctic: the Helophorus water beetles of the Afrotropical Region (Coleoptera: Helophoridae)

Fig. 5. Afrotropical Helophorus, known distributions. Map by https:// mapswire.com.

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Figs 4–7. Cercyon symbion. 4–6 in New records of water beetles (Coleoptera: Helophoridae, Hydrophilidae, Hydraenidae) from Commander Islands

Figs 4–7. Cercyon symbion. 4–6 –male genitalia, dorsal view: 4 – tegmen with parameres;

Fig. 7 in Morphology of immature stages of Helophorus (Gephelophorus) auriculatus (Coleoptera, Helophoridae)

Fig. 7. Third instar larva of Helophorus auriculatus Sharp, 1884. A – antenna, dorsal (left) and ventral (right) surface, both drawn from dorsal view, gAN omitted; B – mandible, dorsal view; C – ventral surface of basal part of mandible; D – maxilla, dorsal (left) and ventral (right) surface, both drawn from dorsal view; E – labium, dorsal view (left) and labium and its adjacent structure, ventral view (right), gAN omitted.

Fig. 4 in Morphology of immature stages of Helophorus (Gephelophorus) auriculatus (Coleoptera, Helophoridae)

Fig. 4. First instar larva of Helophorus auriculatus Sharp, 1884. Head appendages. A, B – antenna, dorsal (A) and ventral (B) view; C–E – mandibles (C – right mandible, dorsal view, D – right mandible, ventral surface (drawn from dorsal), E – left mandible, dorsal view); F–H – maxilla (F – ventral view, gMX omitted; G, H – maxilla, slightly modified by pressure of cover glass for examination, dorsal (G) and ventral (H) face, both drawn from dorsal view). I–K – labium, dorsal (I), dorsolateral (J), ventral (K) view.

Fig. 8. Helophorus auriculatus Sharp, 1884 in Morphology of immature stages of Helophorus (Gephelophorus) auriculatus (Coleoptera, Helophoridae)

Fig. 8. Helophorus auriculatus Sharp, 1884, sclerites on ventral prothoracic segment of third instar larva.

Fig. 1 in Morphology of immature stages of Helophorus (Gephelophorus) auriculatus (Coleoptera, Helophoridae)

Fig. 1. Immature stages of Helophorus auriculatus Sharp, 1884. A, B – egg-case; C–H – whole larva; C, D – first instar, dorsal (C) and ventral (D) view; E – second instar, dorsal view; F–H – third instar, dorsal (F), lateral (G), ventral (H) view; I–K – ventral structure of nasale tooth (I – first instar, from ventral side; J – second instar, from dorsal side; K – third instar, from ventral side).

Fig. 5 in Morphology of immature stages of Helophorus (Gephelophorus) auriculatus (Coleoptera, Helophoridae)

Fig. 5. Larvae of Helophorus auriculatus Sharp, 1884. A – head, second instar larva, dorsal (left) and ventral (right) view; B – head, third instar larva, dorsal (left) and ventral (right) view; C – posterior leg, first instar, anterior view; D – posterior leg, third instar, anterior view; E – abdominal apex, third instar, dorsal view.

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Figure 1 from: Angus RB (2017) A remarkable new Helophorus species (Coleoptera, Helophoridae) from the Tibetan Plateau (China, Sichuan). ZooKeys 718: 133-137. https://doi.org/10.3897/zookeys.718.21361

Figure 1 - Helophorus dracomontanus sp. n. a holotype, dorsal b holotype head and pronotum, dorsal c paratype, lateral part of pronotum, ventral d paratype elytral epipleurs and flanks, metaventrite and abdomen, ventral e, f base of elytra and pronotum (dorsal) of holotype (e) and paratype (f) showing the scutellary striae. Scale bar: 1 mm (a, b, d, e, f); 0.5 mm (c).

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Figure 2 from: Angus RB (2017) A remarkable new Helophorus species (Coleoptera, Helophoridae) from the Tibetan Plateau (China, Sichuan). ZooKeys 718: 133-137. https://doi.org/10.3897/zookeys.718.21361

Figure 2 - Habitat of Helophorus dracomontanus sp. n., Sichuan. Kangding County. Yalashenshan 30°12'17.22"N, 101°45'17.82"E. Small pools 4074 m above sea level. On the right is the driver and beside him Zhi-qiang Li. (For an account of this trip, see Angus 2017).