Chinecallicerus trituberculatus Assing 2018, nov.sp.
Creators: name: Assing, Volker
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Chinecallicerus
Chinecallicerus trituberculatus

description: Chinecallicerus trituberculatus nov.sp. (Figs 33-41, Map 1)
T y p e m a t e r i a l: Holotype ♂: " CHINA - Yunnan [CH07-15], Baoshan Pref., Gaoligong Shan, 29 km ESE Tengchong, 24°55'37''N, 98°45'09''E, 2350 m, dev. decid. forest, litter, wood, fungi sifted, 1.VII.2007, M. Schülke / Holotypus ♂ Chinecallicerus trituberculatus sp.n., det. V. Assing 2018" (MNB).
E t y m o l o g y: The specific epithet (adjective) alludes to the pronounced tubercles on the male tergites III, IV, and VII.
D e s c r i p t i o n: Body length 5.1 mm; length of forebody 2.2 mm. Habitus as in Fig. 33. Coloration: head and pronotum blackish; elytra blackish with the vicinity of the suture slightly and diffusely paler; abdomen black with the posterior margins of tergites III-VI and the posterior portions of tergites VII and VIII reddish; legs yellowish-red; antennae brown with the basal two antennomeres slightly paler; maxillary palpi brown with the apical palpomere pale-yellowish.
Head (Fig. 34) distinctly transverse, approximately 1.15 times as broad as long; posterior angles weakly marked, nearly obsolete; punctation moderately sparse and extremely fine, visible only at high magnification; interstices with shallow traces of microsculpture visible only at high magnification. Eyes distinctly convex and large, longer than postocular region in dorsal view. Antenna (Fig. 35) 1.6 mm long and massive; antennomeres IV weakly oblong, V approximately as long as broad, VI-X weakly transverse, and XI approximately as long as the combined length of IX and X. Maxillary palpomere III distinctly dilated.
Pronotum (Fig. 34) conspicuously large in relation to head, 1.13 times as broad as long and 1.6 times as broad as head, broadest in posterior half; disc moderately convex in cross-section; middle of posterior margin strongly produced posteriad; punctation dense and fine; interstices without microsculpture.
Elytra (Fig. 34) approximately 0.8 times as long as pronotum; punctation very dense, fine, and granulose, more distinct than that of head and pronotum; interstices with shallow microsculpture only in anterior portion. Hind wings probably fully developed.
Abdomen (Figs 36-37) narrower than elytra; tergites III-V with shallow impunctate and glossy anterior impressions; anterior portions of tergties VI-VII impunctate; remainder of tergal surfaces with moderately dense (tergites III-V) or sparse punctation (tergites VI- VII); tergites glossy, with extremely fine and nearly obsolete transverse microsculpture visible only at high magnification; posterior margin of tergite VII with palisade fringe.
♂: tergites III, IV, and VII each with pronounced median tubercle posteriorly (Figs 36- 37); posterior margin of tergite VIII truncate in the middle (Fig. 38); posterior margin of sternite VIII obtusely pointed (Fig. 39); median lobe of aedeagus 0.5 mm long and shaped as in Figs 40-41.
♀: unknown.
C o m p a r a t i v e n o t e s: This species is distinguished from all its congeners by a conspicuously large (in relation to head) and posteriorly strongly produced pronotum and by the male primary and secondary sexual characters (tubercles on tergites III, IV, and VII; shape of aedeagus). It additionally differs from the geographically close C. grandicollis by darker coloration, larger eyes, the shapes of antennomeres IV-X, dilated maxillary palpomeres III, and granulose punctation of the elytra.
D i s t r i b u t i o n a n d n a t u r a l h i s t o r y: The type locality is situated near Tengchong in the Gaoligong Shan, Northwest Yunnan, China (Map 1). The holotype was sifted from litter in a degraded deciduous forest at an altitude of 2350 m.
description: Published as part of Assing, Volker, 2018, Six new species of Chinecallicerus from China, with a new synonymy (Coleoptera: Staphylinidae: Aleocharinae: Geostibini), pp. 47-63 in Linzer biologische Beiträge 50 (1) on pages 61-62, DOI: 10.5281/zenodo.3985251