Predaceous Diving Beetles

Figure 2.Habitus, dorsal view: A Rhantus manjakatompo holotype (Ankaratra mountains) B Rhantus manjakatompo (Tsaratanana mountains) C Rhantus bouvieri D Rhantus latus.

Figures 1–9.Fontidessus species, dorsal habitus. 1 Fontidessus microphthalmus 2 Fontidessus bettae 3 Fontidessus bettae 4–5 Fontidessus toboganensis 4 Suriname specimen 5 Venezuela specimen 6 Fontidessus christineae 7–8 Fontidessus ornatus 7 Suriname specimen 8 Venezuela specimen 9 Fontidessus wheeleri. Scale = 1.0 mm.

Figures 44–47.Habitus and coloration. 44 Exocelina soppi sp. n. 45 Exocelina pseudosoppi sp. n. 46 Exocelina eme sp. n. 47 Exocelina brahminensis sp. n.

Figure 3.SEM images of pronotal and elytral microstructure: A–C Rhantus manjakatompo pronotum (A) anterior part of elytron (B) and posterior part of elytron (C) D–F Rhantus bouvieri pronotum (D) anterior part of elytron (E) and posterior part of elytron (F) G–I Rhantus latus pronotum (G) anterior part of elytron (H) and posterior part of elytron (I).

Figures 10–23.Fontidessus species. 10–16 prosternal process 10 Fontidessus microphthalmus 11 Fontidessus aquarupe 12 Fontidessus bettae 13 Fontidessus toboganensis 14 Fontidessus christineae 15 Fontidessus ornatus 16 Fontidessus wheeleri 17–23 left metatrochanter and metafemur, anterior aspect 17 Fontidessus microphthalmus 18 Fontidessus bettae 19 Fontidessus toboganensis 20 Fontidessus christineae 21 Fontidessus ornatus. 22, Fontidessus wheeleri.

Figures 18–19.18 Exocelina soppi sp. n. 19 Exocelina pseudosoppi sp. n. A male antenna B protarsomeres 4–5 in ventral view C median lobe in ventral view D median lobe in lateral view E paramere in external view.

Figure 4.Habitus, ventral view: A Rhantus manjakatompo holotype B Rhantus bouvieri C Rhantus latus.

Figures 24–30.Fontidessus species, aedeagi. 24 Fontidessus microphthalmus; A, median lobe and lateral lobes, dorsal aspect, lateral lobes in gray; B, median lobe, right lateral aspect 25–30 A, median lobe and right lateral lobe, dorsal aspect; B, ventral sclerite of median lobe; C, median lobe, right lateral aspect; D, right lateral lobe, right lateral aspect 25 Fontidessus aquarupe 26 Fontidessus bettae 27 Fontidessus toboganensis 28 Fontidessus christineae 29 Fontidessus ornatus 30 Fontidessus wheeleri.

Figures 44–47.Habitus and coloration. 44 Exocelina soppi sp. n. 45 Exocelina pseudosoppi sp. n. 46 Exocelina eme sp. n. 47 Exocelina brahminensis sp. n.

Figure 5.Left protarsal claws: A–B Rhantus manjakatompo,lateral (A) and dorsal (B) view C–D Rhantus bouvieri, lateral (C) and dorsal (D) view E–F Rhantus latus, lateral (E) and dorsal (F) view.

Figures 31–33.Fontidessus species, distributions. Pink area indicates Guiana Shield craton.

Figures 22–23.22 Exocelina kakapupu sp. n. 23 Exocelina unipo sp. n. A male antenna B protarsomeres 4–5 in ventral view C median lobe in ventral view D median lobe in lateral view E paramere in external view.

Figure 6.Left mesotarsal claws: A–B Rhantus manjakatompo,lateral (A) and dorsal (B) view C–D Rhantus bouvieri, lateral (C) and dorsal (D) view E–F Rhantus latus, lateral (E) and dorsal (F) view.

Figures 34–36.Fontidessus species, habitat. 34 collection site for paratypes of Fontidessus microphthalmus (SR12–0324–01A) 35 collection site for paratypes of Fontidessus christineae (SR12–0324–01C) 36 type locality for Fontidessus bettae (VZ10–0716–03B).

Figures 48–49.Habitus and coloration. 48 Exocelina kakapupu sp. n. 49 Exocelina unipo sp. n.

Figure 7.Male genitals, penis in lateral and dorsal view: A–B Rhantus manjakatompo C–D Rhantus bouvieri E–F Rhantus latus. Parameres in lateral view G Rhantus manjakatompo H Rhantus bouvieri I Rhantus latus.

Figures 1–9.Fontidessus species, dorsal habitus. 1 Fontidessus microphthalmus 2 Fontidessus bettae 3 Fontidessus bettae 4–5 Fontidessus toboganensis 4 Suriname specimen 5 Venezuela specimen 6 Fontidessus christineae 7–8 Fontidessus ornatus 7 Suriname specimen 8 Venezuela specimen 9 Fontidessus wheeleri. Scale = 1.0 mm.

Figure 14.Exocelina utowaensis sp. n. A male antenna B protarsomeres 4–5 in ventral view C abdominal sternite 7 D median lobe in ventral view E median lobe in lateral view F paramere in external view.

Figure 8.Distribution and all known records of the three Rhantus species of Madagascar with a special emphasis on Manjakatompo. Inset map of Manjakatompo adapted from FTM (1995) Extent of natural forest left may have changed since the map was made.

Figures 10–23.Fontidessus species. 10–16 prosternal process 10 Fontidessus microphthalmus 11 Fontidessus aquarupe 12 Fontidessus bettae 13 Fontidessus toboganensis 14 Fontidessus christineae 15 Fontidessus ornatus 16 Fontidessus wheeleri 17–23 left metatrochanter and metafemur, anterior aspect 17 Fontidessus microphthalmus 18 Fontidessus bettae 19 Fontidessus toboganensis 20 Fontidessus christineae 21 Fontidessus ornatus. 22, Fontidessus wheeleri.

Figures 40–43.Habitus and coloration. 40 Exocelina utowaensis sp. n. 41 Exocelina bifida sp. n. 42 Exocelina ekari sp. n. 43 Exocelina weylandensis sp. n.

Figures 24–30.Fontidessus species, aedeagi. 24 Fontidessus microphthalmus; A, median lobe and lateral lobes, dorsal aspect, lateral lobes in gray; B, median lobe, right lateral aspect 25–30 A, median lobe and right lateral lobe, dorsal aspect; B, ventral sclerite of median lobe; C, median lobe, right lateral aspect; D, right lateral lobe, right lateral aspect 25 Fontidessus aquarupe 26 Fontidessus bettae 27 Fontidessus toboganensis 28 Fontidessus christineae 29 Fontidessus ornatus 30 Fontidessus wheeleri.

Figure 9.Exocelina anggiensis sp. n. A male antenna B protarsomeres 4–5 in ventral view C median lobe in ventral view D median lobe in lateral view E paramere in external view.

Figures 31–33.Fontidessus species, distributions. Pink area indicates Guiana Shield craton.