Stiliderus germanus, Rougemont, 2015

Rougemont, Guillaume De, 2015, Studies on Stiliderus Motschulsky and Stilicoderus Sharp: biogeographical notes and descriptions of new species (Coleoptera: Staphylinidae: Paederinae), Stuttgarter Beiträge zur Naturkunde A, Neue Serie 8, pp. 113-130 : 125

Stiliderus germanus n. sp.

Holotype (♂): Indonesia, C. Sulawesi, Palu Palolo, Lindu N. P. , 25.–27.VIII.1990, leg. A. RIEDEL ( SMNS) .

P a r a t y p e s: 3 ♂♂, 4 ♀♀, same data as holotype (5 exx. SMNS, 2 exx. CRO) .

Description

Body length 6.0– 6.5 mm. Proportions of holotype: length of head: 98; breadth of head: 100; diameter of eye: 30; length of antenna: 198; length of pronotum: 97; breadth of pronotum: 86; length of elytron: 96; breadth of elytra: 113; metatibia: 104; metatarsus: 51.

Black, labrum pitchy with margins rufescent; palpi rufo-testaceous; antennae dark brown, antennomere I infuscate; legs pitchy black, pro- and mesotibia and all tarsi dark reddish brown.

Male: apical margin of abdominal sternite VII broadly and very shallowly concave; sternite VIII see Fig. 25 , with a moderate emargination, the surface anterior to the emargination broadly, concavely depressed; apical margin of tergite X with a small median emargination. Aedoeagus see Fig. 18 .

Female: abdominal tergite X very deeply emarginate, as in S. yangbesar , forming two long, pointed apico-lateral lobes.

Differential diagnosis

This species only differs externally from S. yangbesar Rougemont 1996 described from north Sulawesi in its slightly lesser size ( S. yangbesar ca. 7 mm), slightly denser puncturation of the head, and the aedoeagus. It appears to be the sister species of the northern Celebesian species S. yangbesar in central Sulawesi.

Figures

Figs. 22–31. Stilicoderus and Stiliderus spp., male sternites VI, VII (22), female sternite XIII (23), male sternite VIII (24, 25, 28), female tergite X (26, 27), fore-body (29–31). – 22. Stilicoderus papuanus n.sp. 23. Stilicoderus sp.X. 24. Stilicoderus sarahae n. sp. 25. Stiliderus germanus n. sp. 26. Stiliderus brendellianus n. sp. 27. Stiliderus sp.Z. 28. Stiliderus agostii n.sp. 29. Stiliderus sp.Z. 30. Stiliderus agostii n.sp. 31. Stiliderus rugulosicollis n. sp. – Scales: 0.5 mm (22–28), 3 mm (29–31).

Figs. 11–21. Stilicoderus and Stiliderus spp., aedoeagi in lateral (a) and ventral (b) views. – 11. Stilicoderus lastianus n. sp. 12. Stilicoderus baliemensis n.sp. 13. Stilicoderus aerosoides n.sp. 14. Stilicoderus papuanus n.sp. 15. Stilicoderus continentalis n. sp. 16. Stilicoderus sarahae n.sp. 17. Stiliderus tengah n. sp. 18. Stiliderus germanus n.sp. 19. Stiliderus rugulosicollis n. sp. 20. Stiliderus brendellianus n.sp. 21. Stiliderus agostii n.sp. – Scales: 0.5 mm.