Stiliderus tengah, 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

publication ID	https://doi.org/ 10.5281/zenodo.3833627
publication LSID	lsid:zoobank.org:pub:080B9FD6-D81F-4AF2-9B82-B5A0C65D8792
DOI	https://doi.org/10.5281/zenodo.3851447
persistent identifier	https://treatment.plazi.org/id/6D714422-FFCF-472F-FEAD-FB7954E2FCCD
treatment provided by	Plazi
scientific name	Stiliderus tengah
status	sp. nov.

Treatment

Stiliderus tengah View in CoL 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: 1 ♀, same data as holotype ( CRO) .

Derivatio nominis

The Malay adjective tengah means “central”; it is used here in reference to the type locality in Central Sulawesi , whereas related species are either from North or South Sulawesi.

Description

Body length ca. 6 mm. Proportions of holotype: length of head: 85; breadth of head: 83; diameter of eye: 27; length of antenna: 200; length of pronotum: 85; breadth of pronotum: 69; length of elytron: 85; breadth of elytra: 98; metatibia: 92; metatarsus: 51.

Fore-body black; abdomen pitchy brown; antennae reddish brown, antennomeres I–VII decreasingly infuscate distally; femora fuscous, tibia reddish brown, metatibia and tarsi infuscate.

Male: apical margin of abdominal sternite VII broadly and feebly excised; entire apical margin of sternite VIII deeply, arcuately excised, the apico-lateral angles furnished with a brush of dark setae as in S. kakimerah Rougemont (see ROUGEMONT 1996: fig. 15) and S. kakihitam Rougemont. Aedoeagus see Fig. 17 View Figs .

Female: apical margin of tergite X with a small, broad triangular median emargination.

Differential diagnosis

This, like the following four new species, belongs to the Celebesian endemic brendelli group; in size, facies and puncturation it is almost indistinguishable from S. kakihitam Rougemont 1996 described from N Sulawesi. It only differs from S. kakihitam in the somewhat more depressed elytra, darker antennae, slightly smaller emargination of female tergite X, and in the shape of the ventral blade of the aedoeagus (see ROUGEMONT 1996: fig. 29). It appears to be the sister species of S. kakihitam in central Sulawesi.