Stilicoderus lobatus, 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 : 116-117

publication ID	https://doi.org/ 10.5281/zenodo.3833627
publication LSID	lsid:zoobank.org:pub:080B9FD6-D81F-4AF2-9B82-B5A0C65D8792
persistent identifier	https://treatment.plazi.org/id/6D714422-FFC0-4727-FC27-F9835089FCD4
treatment provided by	Plazi
scientific name	Stilicoderus lobatus
status	sp. nov.

Treatment

Stilicoderus lobatus View in CoL n. sp.

Holotype (♂): Papua New Guinea, West Sepik, Vanimo,

Denake Range, km 12, 28.–29.X. 1992, leg. A. RIEDEL ( SMNS). P a r a t y p e: 1 ♂, same data as holotype ( CRO) .

Description

Body length 4.3–4.5 mm. Proportions of holotype: length of head: 52; breadth of head: 64; diameter of eye: 26; length of antenna: 127; length of pronotum: 60; breadth of pronotum: 53; length of elytron: 72; breadth of elytra: 67; metatibia: 61; metatarsus: 31.

Pitchy black, the elytra slightly paler, brownish, in holotype; labrum dark brown; mouthparts, antennae and legs rufo-testaceous, all femora infuscate. Head slightly transverse, appearing more so due to prominent eyes, the temples fairly strongly convergent before apico-lateral angles.

Male: sternite VIII as in preceding species. Aedoeagus see Fig. 8 View Figs , the apex of ventral blade fairly narrow, curving dorsad and concealed in lateral view by the parameroid lobes, the latter remarkably developed into laterally projecting lobes in ventral view.

Differential diagnosis

This new species is readily distinguishable from the syntopic S. riedelianus n. sp. and S. maritimoides n. sp. and from S. riedeli n. sp. and S. meraukeanus n. sp. described below by its greater size. In size and proportions it more closely resembles the allopatric species S. kaiensis Rougemont 1996 , and S. laticeps n. sp. but differs in its less transverse head. From all other species it differs in the conformation of the aedoeagus.