Studies on Stiliderus Motschulsky and Stilicoderus Sharp: biogeographical notes and descriptions of new species (Coleoptera: Staphylinidae: Paederinae) Author Rougemont, Guillaume De text Stuttgarter Beiträge zur Naturkunde A, Neue Serie 2015 2015-04-30 8 113 130 journal article http://doi.org/10.5281/zenodo.3833627 a18c0d1c-bdee-460d-b89a-07f536714c46 3833627 080B9FD6-D81F-4AF2-9B82-B5A0C65D8792 Stilicoderus riedeli n. sp. Holotype ( ♂ ): Irian Jaya , Sorong Prov. , Batanta Island , 10 m , sifted , 30.X.1996 , leg. A. RIEDEL ( NHMW ) . P a r a t y p e s: 18 exx., same data as holotype; 5 exx., same locality and collector as holotype , but 150 m , 2.XI.1996 ; 2 exx., Irian Jaya , Sorong Prov. , Salawatti Island , Solol , 200–300 m , 6.–7.XI.1996 , sifted, leg. A. RIEDEL (20 exx. NHMW , 5 exx. CRO ) . Description Body length ca. 4.1 mm . Proportions of holotype : length of head: 51; breadth of head: 65; diameter of eye: 24; length of antenna: 105; length of pronotum: 59; breadth of pronotum: 51; length of elytron: 67; breadth of elytra: 65; metatibia: 58; metatarsus: 35. In colour, facies, sculpture etc. similar to S. hieroglyphicus and its allies, the legs entirely testaceous, but smaller than any species of this group described so far. Male: abdominal sternites as in S. hieroglyphicus . Aedoeagus see Fig. 2 . Differential diagnosis S. riedeli is distinguished from all other members of the hieroglyphicus group by its small size and by the conformation of the ventral blade and spatulate parameroid lobes of the aedoeagus. It inhabits the same island as the similar species S. laticeps , described above, but was taken at lower altitudes.