Pseudonthobium

Montreuil, Olivier & Théry, Thomas, 2011, Revision of the New Caledonian genus Pseudonthobium Paulian, 1984 (Coleoptera: Scarabaeidae: Epilissini), Zootaxa 2863, pp. 49-62 : 61

Key to species of Pseudonthobium

1. Length 3.5–4.5 mm .................................................................................... 2

- Length 6.0– 10.5 mm ................................................................................... 4

2. Length 4.5 mm. Male unknown. Side of elytra evenly curved along base, then straighter, convergent; elytra appearing elongated. Protibia bidentate on outer margin, basal tooth not visible. Female elytral lateral depression deep, affecting a large part of the 4th and 7th interstriae............................................................... P. foveolatum n. sp.

- Length 3.5–4.0 mm. Side of elytra evenly curved, elytra of normal shape. Protibia tridentate on outer margin, basal tooth small but well developed; elytra of female without depression or with superficial lateral depression not affecting the 4th and 7th interstriae............................................................................................... 3

3. Female without any depression on elytra................................................. P. monteithianum n. sp.

- Female with a deep depression at the middle on the side of elytra, affecting at least the 5th and 6th interstriae.................................................................................................. P. fracticolle (Fauvel)

4. Apical margin of 8th tergite strongly enlarged; lobes of basal margin of pronotum strongly projected ( Fig. 27 ); elytra with numerous setae, setae short or long but always densely distributed on the surface of the disc......................... 5

- Apical margin of 8th tergite not particularly enlarged; lobes of basal margin of pronotum feebly projected ( Fig. 26 ); elytra glabrous or with sparse setae, mostly distributed on odd interstriae, near apex....................................... 8

5. Tegument bearing strong coppery or metallic reflections; inner margin of male protibia straight, deeply notched, hook-shaped before apex ( Fig. 23 ); posterior margin of mesofemora angulate at the middle; patches of setae distributed on odd interstriae........................................................................................ P. paniense n. sp.

-..Tegument completely black without any metallic reflections; inner margin of protibia sinuate, largely notched, with a strong lamella ( Figs. 18, 21, 22 ); posterior margin of mesofemora normal; setae evenly distributed on odd interstriae........... 6

6. Hind margin of male metafemora straight; right paramere straight in dorsal view ( Fig. 10 )........ P. fracticolloides Paulian

- Hind margin of male metafemora more-or-less notched close to the base ( Fig. 28 ); right paramere curved outward in dorsal view ( Figs. 13, 14 )..................................................................................... 7

7. Length 6.0–8.0 mm; elytra normal, external margin evenly curved ( Fig. 5 ); base of posterior margin of metafemora feebly notched; metatibia normal, shorter than metafemora, feebly curved; parameres: Fig. 14 ............. P. humboldtense n. sp.

- Length 8.0– 10.5 mm; elytra elongated, external margin distinctly sinuate after middle ( Fig. 4 ); base of posterior margin of metafemora distinctly notched; metatibia as long as metafemora, straight; parameres: Fig. 13 ........ P. sinuatotibiale n. sp.

8. Apex of left paramere strongly projected laterally ( Fig. 12 ); inner margin of protibia strongly notched before apex, hookshaped ( Fig. 20 )........................................................................... P. genieri n. sp.

- Apex of left paramere elongate, feebly projected laterally ( Fig. 11 ); inner margin of protibia simply notched before apex ( Fig. 19 )........................................................................................ P. doense n. sp.

Figures

FIGURES 26 – 28. Pronotum of Pseudonthobium, dorsal view. 26, P. g e n i e r i n. sp.; 27, P. fracticolloides Paulian; 28, Male posterior leg of P. sinuatotibiale n. sp., ventral view. Scale bar: 1 mm.

FIGURES 18 – 25. Right protibia of male Pseudonthobium, dorsal view. 18, P. fracticolloides Paulian; 19, P. doense n. sp.; 20, P. g e n i e r i n. sp.; 21, P. sinuatotibiale n. sp.; 22, P. humboldtense n. sp.; 23, P. paniense n. sp.; 24, P. monteithianum n. sp.; 25, P. fracticolle (Fauvel). Scale bar: 1 mm.

FIGURES 10 – 17. Parameres of Pseudonthobium, right, dorsal and left views. 10, P. fracticolloides Paulian; 11, P. doense n. sp.; 12, P. g e n i e r i n. sp.; 13, P. sinuatotibiale n. sp.; 14, P. humboldtense n. sp.; 15, P. paniense n. sp.; 16, P. monteithianum n. sp.; 17, P. fracticolle (Fauvel). Scale bar: 1 mm.

FIGURES 1 – 9. Habitus of Pseudonthobium. 1, P. fracticolloides Paulian, male; 2, P. doense n. sp., male; 3, P. genieri n. sp., male; 4, P. sinuatotibiale n. sp., male; 5, P. humboldtense n. sp., male; 6, P. paniense n. sp., male; 7, P. monteithianum n. sp., male; 8, P. foveolatum n. sp., female; 9, P. fracticolle (Fauvel), male. Scale bar: 1 mm.