Stilicoderus sp. X, Sharp, 1889

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 : 122-123

Stilicoderus sp. X .

2 ♀♀, Irian Jaya, Jayawijaya, Wamena, Jiwika , 2300 m, 29.IX. 1992, leg. A. RIEDEL ; 2 ♀♀, Irian Jaya, Baliem Tal, Jiwika- Wandaku , 1900 – 2200 m, 5.– 6.IX. 1990, leg. A. RIEDEL (3 exx. SMNS, 1 ex. CRO) .

Description

Body length 6.1–6.3 mm. Proportions: length of head: 88; breadth of head: 90; diameter of eye: 31; length of antenna: 164; length of pronotum: 82; breadth of pronotum: 74; length of elytron: 118; breadth of elytra: 104; metatibia: 85; metatarsus: 51.

Head and pronotum black, elytra brown, abdomen brown, palpi, antennae and legs reddish brown, the meso- and metafemora obscured in some individuals. Head slightly transverse, rather depressed, the punctures slightly elongate, closer anteriorly where the interstices tend to form longitudinal rugae. Head covered in pale recumbent pubescence. Labrum tridentate, the outer teeth slightly longer and stouter than lateral teeth. Pronotum elongate. Covered in dense granulose puncturation and pale recumbent pubescence. Elytra elongate, the large foveate punctures not serially aligned; elytra totally devoid of granules, but with long, pale recumbent pubescence.

Male: unknown.

Female: posterior margin of 8 th sternite ( Fig. 23 ) broadly produced in the middle.

Remark

This is the largest known member of the aerosus group and as such should be readily separated from other species using the key above.

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).