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FIGURE 9 in Prosthetops wolfbergensis sp. nov. — a giant amongst the ' minute moss beetles', with new data on other members of the genus (Coleoptera, Hydraenidae)

FIGURE 9. Aedeagal apices of Prosthetops males. A) P. wolfbergensis sp. nov.; B) P. megacephalus; C) P. pronotus; D) P. s e t o s u s.

FIGURE 11 in Prosthetops wolfbergensis sp. nov. — a giant amongst the ' minute moss beetles', with new data on other members of the genus (Coleoptera, Hydraenidae)

FIGURE 11. Habitats of P. megacephalus and P. nitens on Table Mountain, Western Cape, South Africa. A)–B) pools with organic silt occupied by P. megacephalus; C) small rockpools occupied by P. nitens. Photos D T Bilton.

FIGURE 12 in Prosthetops wolfbergensis sp. nov. — a giant amongst the ' minute moss beetles', with new data on other members of the genus (Coleoptera, Hydraenidae)

FIGURE 12. Habitats of Prosthetops species, Western Cape, South Africa. A) pools in Tsitsikamma National Park beside Salt River (P. pronotus); B) rocky outcrop with pools and seeps above Mont Rochelle, Franschhoek (P. seto s us). Photos D T Bilton.

FIGURE 5 in Prosthetops wolfbergensis sp. nov. — a giant amongst the ' minute moss beetles', with new data on other members of the genus (Coleoptera, Hydraenidae)

FIGURE 5. Metacoxae and metatrochanters of Prosthetops males. A) P. wolfbergensis sp. nov.; B) P. megacephalus; C) P. pronotus; D) P. setosus.

FIGURE 7 in Prosthetops wolfbergensis sp. nov. — a giant amongst the ' minute moss beetles', with new data on other members of the genus (Coleoptera, Hydraenidae)

FIGURE 7. Protarsi of Prosthetops males. A) P. w o l f b e rg e n s i s sp. nov.; B) P. megacephalus; C) P. pronotus; D) P. setosus.

FIGURE 1 in Prosthetops wolfbergensis sp. nov. — a giant amongst the ' minute moss beetles', with new data on other members of the genus (Coleoptera, Hydraenidae)

FIGURE 1. Habitus of Prosthetops males. A) P. w olf bergen sis sp. nov., paratype; B) P. pronotus; C) P. megacephalus; D) P. setosus. Scale bar = 1 mm.

FIGURE 8 in Prosthetops wolfbergensis sp. nov. — a giant amongst the ' minute moss beetles', with new data on other members of the genus (Coleoptera, Hydraenidae)

FIGURE 8. Mesotarsi of Prosthetops males. A) P. wolfbergensis sp. nov.; B) P. megacephalus; C) P. pronotus; D) P. setosus.

FIGURE 4 in Prosthetops wolfbergensis sp. nov. — a giant amongst the ' minute moss beetles', with new data on other members of the genus (Coleoptera, Hydraenidae)

FIGURE 4. Clypeo-labral region of Prosthetops males. A) P. w o l f b e rg e n s i s sp. nov.; B) P. megacephalus; C) P. pronotus; D) P. setosus.

FIGURE 6 in Prosthetops wolfbergensis sp. nov. — a giant amongst the ' minute moss beetles', with new data on other members of the genus (Coleoptera, Hydraenidae)

FIGURE 6. Mesotibiae of Prosthetops males. A) P. wolfbergensis sp. nov.; B) P. megacephalus; C) P. pronotus; D) P. setosus.

FIGURE 3 in Prosthetops wolfbergensis sp. nov. — a giant amongst the ' minute moss beetles', with new data on other members of the genus (Coleoptera, Hydraenidae)

FIGURE 3. Head and pronotum of Prosthetops males. A) P. wolfbergensis sp. nov.; B) P. megacephalus; C) P. pronotus; D) P. setosus.

FIGURE 2 in Prosthetops wolfbergensis sp. nov. — a giant amongst the ' minute moss beetles', with new data on other members of the genus (Coleoptera, Hydraenidae)

FIGURE 2. Habitus of Prosthetops females. A) P. w ol fbergen si s sp. nov., paratype; B) P. pronotus. Scale bar = 1 mm.

FIGURE 10 in Prosthetops wolfbergensis sp. nov. — a giant amongst the ' minute moss beetles', with new data on other members of the genus (Coleoptera, Hydraenidae)

FIGURE 10. Habitats of P. wolfbergensis sp. nov., Cederberg range, Western Cape, South Africa A) type locality, rockpool below Wolfberg Arch; B) small rockpools nr. Stadsaal Cave, (pools were completely dry one day earlier, when pool in C) was photographed; C) large rockpool nr. Stadsaal Cave. Photos D T Bilton.

FIGURE 12 in Morphology and feeding biology of larvae of the South African endemic water beetle genus Prosthetops Waterhouse, 1879 (Coleoptera: Hydraenidae)

FIGURE 12. Gut contents of larvae of Prosthetops wolfbergensis. a: Particulate material and mineral granules; b: Prickle phytolith; c: Trapezoid phytolith; d: Fungal spores; e: Pollen grain of Stoebe sp.; f: Pollen grain of Myrica; g: Fungal hyphae and organic material. Scale bars: 30 µm.

FIGURE 10 in Morphology and feeding biology of larvae of the South African endemic water beetle genus Prosthetops Waterhouse, 1879 (Coleoptera: Hydraenidae)

FIGURE 10. Third instar larva of Prosthetops megacephalus. a: Thorax, dorsal view; b: First and second abdominal segments, dorsal view. Scale bar: 0.3 mm.

FIGURE 9. a in Morphology and feeding biology of larvae of the South African endemic water beetle genus Prosthetops Waterhouse, 1879 (Coleoptera: Hydraenidae)

FIGURE 9. a: Second instar larva of P. nitens, third abdominal segment, lateral view; b: Urogomphi of a teratological third instar larva of P. nitens, dorsal view; c: Anal lobe of third instar larva of P. wolfbergensis, lateral plate; d: Anal lobe of third instar larva of P. wolfbergensis, ventral plate; e: Anal lobe of third instar larva of P. nitens, lateral plate; f and g: Anal lobe of third instar larva of P. nitens, ventral plates; h: Anal lobe of third instar larva of P. megacephalus, lateral plate. Scale bars: 0.3 mm.

FIGURE 7 in Morphology and feeding biology of larvae of the South African endemic water beetle genus Prosthetops Waterhouse, 1879 (Coleoptera: Hydraenidae)

FIGURE 7. Third instar larva of Prosthetops wolfbergensis. a: Abdominal segments IV to VI, lateral view; B: Urogomphi, dorsal view. Scale bar: 0.3 mm.

FIGURE 8. Abdominal segments IX and X in Morphology and feeding biology of larvae of the South African endemic water beetle genus Prosthetops Waterhouse, 1879 (Coleoptera: Hydraenidae)

FIGURE 8. Abdominal segments IX and X of third instar larva of Prosthetops wolfbergensis. a: Dorsal view; b: Ventral view; c: Lateral view. Scale bar: 0.3 mm.

FIGURE 5 in Morphology and feeding biology of larvae of the South African endemic water beetle genus Prosthetops Waterhouse, 1879 (Coleoptera: Hydraenidae)

FIGURE 5. Third instar larva of Prosthetops wolfbergensis. a: Pro and mesonotum, dorsal view; b: Thorax, ventral view, c: Detail of mesothoracic spiracular tubercle, dorsal view. Scale bars: 0.3 mm (a, b), 0.1 mm (c).

FIGURE 4 in Morphology and feeding biology of larvae of the South African endemic water beetle genus Prosthetops Waterhouse, 1879 (Coleoptera: Hydraenidae)

FIGURE 4. Mouthparts and cephalic appendages of third instar larva of Prosthetops wolfbergensis. a: Left antenna, dorsal view; b: Right antenna, dorsal view; c: Labrum, dorsal view; d: Epipharynx, ventral view; e: Detail of distal end of right maxilla, ventral view; f: Maxillae and labium, ventral view; g: Hypopharynx, ventral view; h: Left mandible, dorsal view; i: Right mandible, dorsal view. Scale bars: 0.3 mm (a–d and f–i), 0.05 mm (e).

FIGURE 6 in Morphology and feeding biology of larvae of the South African endemic water beetle genus Prosthetops Waterhouse, 1879 (Coleoptera: Hydraenidae)

FIGURE 6. Third instar larva of Prosthetops wolfbergensis. a: First and second abdominal segments, dorsal view; b: First and second abdominal segments, ventral view; c: Fifth abdominal segment, dorsal view; d: First and second abdominal segments, lateral view. Scale bar: 0.3 mm.