Stilicoderus sarahae Rougemont 2015, n. sp.
Creators: name: Rougemont, Guillaume De
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Stilicoderus
Stilicoderus sarahae

description: <i>Stilicoderus sarahae</i>n. sp. Holotype (&amp;male;): China, Yunnan, Lijiang, Qiaotou, 14. IV. 2003, in moss and litter by stream, leg. G. DE ROUGEMONT (CRO). P a r a t y p e s: 4 &amp;male;&amp;male;, 4 &amp;female;&amp;female;, same data as holotype (CRO). Description Body length 7.0– 7.5 mm. Proportions of holotype: length of head: 103; breadth of head: 98; diameter of eye: 28; length of antenna: 165; length of pronotum: 98; breadth of pronotum: 87; length of elytron: 108; breadth of elytra: 114; metatibia: 100; metatarsus: 70. Body entirely black; labrum dark brown; antennae, tibiae and tarsi brown, femora pitchy black. Median tooth of labrum minute, the inner lateral pair large and blunt, the outer lateral pair small, blunt. Head sub-orbicular, without posterior angles, the puncturation fairly coarse and dense, the interstices everywhere narrower than diameter of punctures except in a couple of places at centre of vertex, the punctures slightly elongate. Pronotum densely covered in discrete large flattened setiferous granules, leaving an entire, broad (10–15) smooth impunctate mid-longitudinal band. Elytra with large, deep simple foveate punctures in parts aligned in longitudinal rows, the interstices with sparse, minute granules on whole surface, becoming denser in impunctate apical area. Abdomen densely, finely, homogeneously punctate as in related species. Male: sternite VIII see Fig. 24, with a large flat median depression, the surface of this depression dull, densely microsculptate, the posterior margin with a large triangular emargination not abruptly narrowed into a parallel-sided fundus as in <i>S. birmanus</i>. Aedoeagus see Fig. 16, quite unlike that of <i>S. birmanus</i>, the ventral blade relatively small, in ventral view lanceolate and concave on ventral surface, its apex in lateral view recurved ventrally. Female: tergite X unmodified. Differential diagnosis This new species closely resembles <i>S. birmanus</i> Scheerpeltz 1965, to which it runs in the key to species in ROUGEMONT 1986a: 149, couplet 59 (60), but single females would not be identifiable without comparison material. The most salient difference between the species is the longer antennae of <i>S. sarahae</i> of which segments 3–11 are all conspicuously elongate; the head of the new species is slightly more elongate and less convex; the pronotum is likewise slightly more elongate, and the granulose puncturation a little sparser and not tending to coalesce into elongate/vermiculate rugae as in <i>S. birmanus</i>; the legs of <i>S. sarahae</i>, especially the tibia, are slightly longer. The aedoeagi and male 8 th sternites, as can be seen in my 1986a article and the present one, are completely different. Remark I have recorded <i>S. birmanus</i> from Yunnan (ROUGEMONT 1996) based on a single female I took in Kunming, but the occurrence of <i>S. birmanus</i> in China needs confirmation by the presence of males there. In any case the two species are likely to be sympatric, since the type localities are very close together on either side of the Yunnan-Burma border.
description: Published as part of <i>Rougemont, Guillaume De, 2015, Studies on Stiliderus Motschulsky and Stilicoderus Sharp: biogeographical notes and descriptions of new species (Coleoptera: Staphylinidae: Paederinae), pp. 113-130 in Stuttgarter Beiträge zur Naturkunde A, Neue Serie 8</i> on pages 123-124, DOI: 10.5281/zenodo.3833627
description: {"references": ["ROUGEMONT, G. DE (1986 a): Revision of the genus Stiliderus Motschulsky, 1858 Part I: (= Stilicoderus Sharp, 1889) (Coleoptera, Staphylinidae, Paederinae). - Entomologische Abhandlungen Staatliches Museum fur Tierkunde Dresden 49: 139 - 187.", "ROUGEMONT, G. DE (1996): Stiliderus and Stilicoderus: New data and new species (Coleoptera, Staphylinidae, Paederinae). - Revue Suisse de Zoologie 103: 713 - 736."]}