Stilicoderus papuanus, 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 : 123

Stilicoderus papuanus n. sp.

Holotype (♂): Irian Jaya, Anggi, Tetaho, Kosmena , 1400 – 1750 m, 26.– 28. III. 1993, leg. A. RIEDEL ( SMNS) .

P a r a t y p e s: 23exx., same data as holotype (18exx. SMNS, 5 exx. CRO).

Description

Body length 4.5 mm. Proportions of holotype: length of head: 70; breadth of head: 68; diameter of eye: 25; length of antenna: 136; length of pronotum: 68; breadth of pronotum: 60; length of elytron: 80; breadth of elytra: 68; metatibia: 70; metatarsus: 42.

Head and pronotum dark brown to fuscous, elytra and abdomen brown, palpi, antennae and legs reddish brown. Head sub-quadrate, the punctures fine and close, becoming elongate anteriorly; head with short, fine pale recumbent pubescence. Pronotum elongate, covered in granulose punctures and fine, pale recumbent pubescence longer than that of head. Elytra elongate, the foveate punctures not aligned serially except more or less in some parts in some individuals. Fine granulose puncturation evident near humeral angles and more broadly near posterior margins.

Male: 8 th sternite unmodified. Aedoeagus see Fig. 14.

Female: 7 th sternite broadly produced apically ( Fig. 22).

Differential diagnosis

In its brown colour S. papuanus n. sp. resembles S. aerosoides n. sp., S. aerosus Last and S. baliemensis n. sp. but differs from all three in its proportionately larger head (broader than elytra) and in the extent of granulose areas on the elytra and the aedoeagus.