Riffle Beetles

Figures 2–4.Hypsilara royi sp. n. 2 Habitus, dorsal view; Scale bar = 2 mm 3 Habitus, ventral view 4 Habitus, lateral view.

Figures 2–9.Habitus (not to scale) of 2 Ancyronyx minerva, adult 3 Ancyronyx tamaraw, sp. n. adult 4 Ancyronyx buhid, sp. n., adult 5 Ancyronyx minerva, larva 6 Ancyronyx tamaraw, sp. n., larva 7 Ancyronyx buhid, sp. n., larva 8 Ancyronyx schillhammeri, adult 9 Ancyronyx schillhammeri, larva.

Figure 5–7.Hypsilara royi sp. n. 5 Hind wing 6 Male genitalia 7 Female genitalia.

Figures 2–9.Habitus (not to scale) of 2 Ancyronyx minerva, adult 3 Ancyronyx tamaraw, sp. n. adult 4 Ancyronyx buhid, sp. n., adult 5 Ancyronyx minerva, larva 6 Ancyronyx tamaraw, sp. n., larva 7 Ancyronyx buhid, sp. n., larva 8 Ancyronyx schillhammeri, adult 9 Ancyronyx schillhammeri, larva.

Figures 8–13.Hypsilara royi sp. n. 8 Antenna 9 Maxillary palp 10 Pronotum, dorsal view 11 Elytron 12 Elytron, detail 13 Elytron, setae removed to show configuration.

Figure 10.Ancyronyx tamaraw Freitag, sp. n., (SEM photographs in greyscale, stereo microscope photographs in colour; not to scale: see respective chapter for size measurements); adult male: A head, frontal B antenna, frontal C maxillary and labial palpi, frontal D head, ventral E throax and abdomen, ventral; adult female: F, G ventrite 5, ventral; adult male: H, I ventrite 5, ventral; adult female: J, K tergite VIII, dorsal; adult male: L, M tergite VIII, dorsal.

Figures 14–17.Hypsilara royi sp. n. 14 Metaventrite 15 Tarsal claw, lateral view 16 Tarsal claw, ventral view 17 Abdomen, ventral view.

Figure 11.Ancyronyx tamaraw Freitag, sp. n., (SEM photographs in greyscale, stereo microscope photographs in colour; not to scale: see respective chapter for size measurements); adult male: A aedeagus, ventral B aedeagus, dorsal C, D aedeagus, lateral E sternite IX, ventral; adult female: F, G ovipositor, ventral; adult male: H sternite VIII, ventral; adult female: I sternite VIII, ventral.

Figures 2–4.Hypsilara royi sp. n. 2 Habitus, dorsal view; Scale bar = 2 mm 3 Habitus, ventral view 4 Habitus, lateral view.

Figure 12.Ancyronyx tamaraw Freitag, sp. n., larva (SEM photographs; not to scale): A detail of abdominal segment III, lateral, with posterolateral projections and spiracles B head, dorsal C head, frontal D head, ventrolateral E meso- and metathoracic and first and second abdominal segments, ventral F lateral parts of median sclerites of abdominal venter, with setiferous tubercles and lateral projections G abdominal segments VIII and IX, dorsal H operculum, ventral.

Figure 5–7.Hypsilara royi sp. n. 5 Hind wing 6 Male genitalia 7 Female genitalia.

Figures 2–9.Habitus (not to scale) of 2 Ancyronyx minerva, adult 3 Ancyronyx tamaraw, sp. n. adult 4 Ancyronyx buhid, sp. n., adult 5 Ancyronyx minerva, larva 6 Ancyronyx tamaraw, sp. n., larva 7 Ancyronyx buhid, sp. n., larva 8 Ancyronyx schillhammeri, adult 9 Ancyronyx schillhammeri, larva.

Figures 8–13.Hypsilara royi sp. n. 8 Antenna 9 Maxillary palp 10 Pronotum, dorsal view 11 Elytron 12 Elytron, detail 13 Elytron, setae removed to show configuration.

Figure 13.Ancyronyx buhid Freitag, sp. n., (SEM photographs in greyscale, stereo microscope photographs in colour; not to scale); adult male: A head, ventral B entire body, ventral C adult female: ventrite 5, ventral; adult male: D ventrite 5, ventral; adult female: E tergite VIII, dorsal; adult male: F tergite VIII, dorsal G sternite IX, ventral; aedeagus, ventral; adult female: I sternite VIII, ventral; adult male: J proximal tarsal segment, lateral K aedeagus, dorsal L aedeagus, ventral; M, N aedeagus, lateral E adult female: O, P ovipositor, ventral.

Figures 14–17.Hypsilara royi sp. n. 14 Metaventrite 15 Tarsal claw, lateral view 16 Tarsal claw, ventral view 17 Abdomen, ventral view.

Figure 14.Ancyronyx buhid Freitag, sp. n., larva (SEM photographs; not to scale): A detail of abdominal segment VII, lateral, with posterolateral projections and spiracles B head, dorsal C head, lateral D head, ventral E antenna, frontal F thoracic and first abdominal segments, ventral G midleg, ventral H abdominal segment IX, lateral I operculum, ventral.

Figure 3–10.Habitus of 3 Ancyronyx minerva Freitag & Jach, 2007, larva, 4 Ancyronyx punkti Freitag & Jach, 2007, larva, 5 Ancyronyx pseudopatrolus Freitag & Jach, 2007, larva, 6 Ancyronyx patrolus Freitag & Jach, 2007, larva, 7 Ancyronyx montanus Freitag & Balke, sp. n., adult, 8 Ancyronyx montanus Freitag & Balke, sp. n., larva, 9 Ancyronyx procerus Jach, 1994, larva, 10 Ancyronyx helgeschneideri Freitag & Jach, 2007, larva.

Figure 12.Ancyronyx tamaraw Freitag, sp. n., larva (SEM photographs; not to scale): A detail of abdominal segment III, lateral, with posterolateral projections and spiracles B head, dorsal C head, frontal D head, ventrolateral E meso- and metathoracic and first and second abdominal segments, ventral F lateral parts of median sclerites of abdominal venter, with setiferous tubercles and lateral projections G abdominal segments VIII and IX, dorsal H operculum, ventral.

Figure 16. Ancyronyx montanus Freitag & Balke, sp. n., (SEM photographs with grey background, stereo microscope photographs with white background) adult male: A head, dorsal, B head, ventral, C pronotum, dorsal, D pro-, meso-, and metaventrite, ventral, E elytra, dorsal, F meso- and metacoxae, metaventrite, ventrites 1–2, ventral, G hind claw, H ventrite 5, ventral; adult female: I ventrite 5, ventral; adult male: J ventrite 5, ventral, K sternite IX, L & M aedeagus, ventral, N aedeagus, lateral; adult female: O ovipositor, ventral, P sternite VIII, ventral, Q tergite VIII, dorsal; adult male: R tergite VIII, dorsal.

Figures 2–9.Habitus (not to scale) of 2 Ancyronyx minerva, adult 3 Ancyronyx tamaraw, sp. n. adult 4 Ancyronyx buhid, sp. n., adult 5 Ancyronyx minerva, larva 6 Ancyronyx tamaraw, sp. n., larva 7 Ancyronyx buhid, sp. n., larva 8 Ancyronyx schillhammeri, adult 9 Ancyronyx schillhammeri, larva.

Figure 17.Ancyronyx montanus Freitag & Balke, sp. n., larva (SEM photographs), A abdominal segments VI–VIII, dorsal, B lateral and parts of median sclerites of abdominal venter, with different types of setae and lateral projections, C posterolateral abdominal projection with trichoid tooth, D head, dorsolateral, E head, dorsal, F head, ventral, G prothorax, ventral, H thoracic and first abdominal segments, ventral, I hindleg, lateral, J operculum, ventral, K abdominal segments VIII and IX, dorsal.

Figure 15.Ancyronyx schillhammeri Jäch, 1994, larva (SEM photographs) not to scale): A detail of abdominal segments II–III, dorsal, with posterolateral projections and spiracles B detail of abdominal segments VI–VII, ventral, with posterolateral projections and spiracles C head, dorsal D detail of head and prothorax, ventral E antenna, ventral F maxillae and labium, ventral G pronotum with signa, dorsal H thorax, ventral I abdominal segment IX, dorsal J midleg, ventral.

Figures 1–4.1 Map of Venezuela, showing collection localities for Disersus inca (Triangle), Disersus chibcha (Circle), and Potamophilops bostrychophallus (Square) 2 Disersus dasycolus (White Circle), Hypsilara royi (White Triangle), Roraima carinata (White Square), Hypsilara breweri (Black square), Hypsilara sp. (Black Circle) 3 Hexanchorus dentitibialis (Circle), Phanoceroides sp. 1 (Triangle), Hexanchorus homaeotarsoides (Square) 4 Hexanchorus falconensis (White Square), Hexanchorus mcdiarmidi (White Circle), Hexanchorus flintorum (Black Circle), Hexanchorus inflatus (White Triangle).

Figures 9–12.Disersus chibcha: 9 Dorsal habitus 10 Ventral habitus 11 Lateral habitus 12 Metatibia, male.